TD42 - All Variants Aussie Water Thermostats

[MB]

G’day NP.com.au!
In regards the seemingly only marketed OEM 76C water thermostat for TD42’s has anybody trialled higher or lower aftermarket settings?
My nuffy understandings are most global diesel engines in general prefer between low 80’s to high 80’s stock vehicular recommendations?
EDIT: Been searching for way too long now trying to find Nissan’s advised operating old donk temps to no avail :-(



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[0-TJ-0]

Just spit'balling here MB but very rarely does mine sit as low as 76degC anyway. I guess if you let it warm up at idle it does but otherwise even with light use it's hovering around 80C.. well that's mine at least. Perhaps they set them a bit lower knowing the running temp would actually be a bit higher anyway? Or perhaps mine is in need of some work haha.

[MB]

That definitely sounds like it mate!
We’ve had such a cold icy winter down here and with our wagons new OEM radiator cruising holds the 76C no worries on the flat.
Would be nice to get that extra pep in the heater this time of year and run it at its true operating temp over winters if anybody kindly knows?



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[mudski]

Yeah I get this issue with mine too. It runs too bloody cold in the winter, and the heater struggles to work. But in the summer the darn thing will boil and even the sight of a hill.
Just had a quick look MB 82c is the highest stat I can see.
https://www.ebay.com.au/itm/DAYCO-Thermostat-Gasket-For-Nissan-Patrol-GQ-Y60-4-2L-TD42-1987-1997-Temp-82/233228390306?hash=item364d7ecfa2:g:mmoAAOSw1B1c2-ZM

[MB]

Thanks Mark mate!
Have seen aftermarket TD42 slightly higher again thermostats somewhere advertised online a while ago too IIRC.
I’m currently trying to search what Nissan in other colder countries like the UK and especially Russia keep on their OEM shelves.
For my 6.5Chev finally found the military yanky manual was 88C and once removed the Aussie installed 75C back to its OEM 88C set was the best thing I ever did, winter and summer.
Absolutely bamboozled that I cannot find Nissan’s officially documented min~max water temp ranges for these donks?


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[tryan277]

from the Patrol Manual
79189
I have installed the genuine thermo and it is now more stable in holding a temp of around 80 degrees. The thermostat that was in it was some dubious aftermarket one and temps would vary, particularly downhill runs.
I probably need to replace the water pump as "hard" climbs see a rise in temp I'm not comfortable with.


Cheers Trevor

[mudski]

Ok another quick search. OEM part number 21200-51D02 is 82c.
As for Tridon part numbers.TT228-180 is 82 deg and TT228-195 is 91 deg

[MB]

Bloody Legends, thankyou heaps!
I’ll try and track down one of each OEM, 82C & 88C, appreciate your efforts[emoji106][emoji106]


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[jff45]

I've run the Tridon 76 degree for the last 4 years and temps rarely hit 80 pottering around (I'm 74) or hwy running.
I did a run to Lorella Springs in May loaded to 3.5t and towing 2.7t and it was easy to get over 100 into a slight headwind if I pushed it a bit. On one long climb I got it to 115 with EGTs at 450.
Average running temps during that trip were in the low 90s most of the time but easy to get higher if you try to maintain 100 or so with that weight.

It was a really good workout and I swear it has never run better since that trip. This is a 140+ rwkw TD42T factory turbo running a modded 11mm and a P4x4 18G.
I run the stock water pump (JPC on the list) but with a G35 fan and over-oiled hub. 52mm 3 core all ally rad.

[MB]

Thanks JFF45 mate!
Since finally replacing the 17YO radiator with a new OEM last summer we haven’t been able to get it over 100C even under the most demanding 40+ambient temperature conditions too.
Admittedly it is 95% stock power and 100% stock cooling system, including the plastic air dam underneath.
Main issue here for us in frigid temps this winter has been getting the heater hotter as it sits cruising flat at exactly 76C and I believe it should be healthier running too up in the mid 80’sish.

EDIT: Meant to say only a mere 5% maybe 10% above stock power due to 3” exhaust and a whisker more fuel done.


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[jff45]

Might be worth looking into an adjustable blind in front of the rad. They were very common with older diesels in Europe in Winter.

[MB]

For sure mate, even heard of blokes shoving a sheet of corflute down in front of their radiators when harsh sleets incoming.
Still keen on trialling the TS not opening until mid to high 80’s to keep toasty onboard :-) [emoji106]



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[MB]

First lucky warm winter afternoon test of the season. Circa 17C ambient temps, towing a half decent 2,000kg box trailer @100kmph helping move house a few highway hours each way.
I know we need an intercooler desperately but it took a deliberate 5th gear uphill pedal flogging at say 10 degree slope over a few kms stretch with heavy headwinds to achieve a horrible 550 exhaust gas temps and to increase water temps to 88C.
(Passenger pics below)
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/112.jpg
Coasting back down the other side of the rise the OEM 76.5C finally shuts down at its manufactued 5C below found.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/113.jpg
To me that’s a 17C fluctuation up and down rises that shouldn’t be recommended by Nissan Australia for us colder folk down here?

EDIT: Shouldn’t have said recommended, only seemingly readily available at all dealerships and affiliated mechanical stockists?


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[MB]

FWIW: Left the old girl idling now at stockish 750rpm whilst moving hay around for an hour or so, good old stock diesels need pedal load :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/114.jpg


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[Reddave]

What’s the rest of the cooling system like?

I use a genuine thermostat in mine, had a genuine hub and fan which I swapped out for a UFI upgraded one, temps seemed more stable with the original fan.

In saying that I haven’t seen above 90 but don’t tow, with the old setup I didn’t see above 85. Normal temps with both setups are around 80-85, heater works awesome, can have the AC flat out on a hot day and not worry about it.

Tune might have something to do with it as well?

[MB]

Thanks Dave mate!
I believe everything is working as it should, just the wrong thermostat for around here?
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/120.jpg


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[jff45]

I believe we're expecting a high of 28 up here in Morayfield today :)

My 18 year old heater core blew on the way back from Lorella Springs in June and I haven't bothered to replace it yet, mainly because of the work involved. I just have a hose bridging outlet direct to return in the meantime and foresee it staying that way until next year at least..

[MB]

Just awoke to a very helpful email off a mate in the UK helping out with my thermostat quandary :-)
It appears they can get the OEM TD42 82C thermostat off the shelf for approximately $48 AUD everyday of the week.
Hasn’t had any luck with the 88C although found that the TD27 lists the same 82C as the TD42 and there is available 88C ones for them that may fit?
Have kindly requested now OEM part numbers from his findings to see what stocks and specs our local dealerships might have on their magic puters around Australia hopefully.


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[MudRunnerTD]

I use the Trident 76c and it has been great mate.

[MB]

Still a relatively cheap winter exercise to trial up here in the hills for some warmth.

Old UK mate has kindly replied just now and I’ve got 3 x thermostats on order for collection tomorrow from Nissan-Lilydale.

21200-58G04 =76.5C
(Will keep this as a summer spare)

21200-05D02 = 82C
(As per Mudski & UK Mate)

21200-05D12 = 88C
(As per UK Mates idea, will need to confirm TD27 actual specs with verniers upon collection)



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[MB]

Well the good news is that all three appear to have identical dimensions including the TD27 88C according to the verniers.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/129.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/130.jpg
Only difference I can find under poor light is that both the 82C & 88C have the ‘Jiggle Pin’ and rubber gaskets whereas the 76.5C does not have either.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/131.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/132.jpg




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[mudski]

Nice work Mr MB. So whats your plan? Put the coldest stat in and see? Better get a few spare stat housing gaskets and be careful of the long bolt that runs through the top and lower housing. These are known for snapping. add some never seize nickel paste to the thread when putting it back in.

[MB]

Cheers Mudski mate, will do all [emoji106][emoji106]


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[jff45]

I'm wondering why 76 degrees isn't enough to warm inside the car, especially if the air is recirculating as well. You can't hold your hand in 76 degree water.
The warm up period to reach that temp will be exactly the same regardless of thermostat rating.

[mudski]

I'm wondering why 76 degrees isn't enough to warm inside the car, especially if the air is recirculating as well. You can't hold your hand in 76 degree water.
The warm up period to reach that temp will be exactly the same regardless of thermostat rating.

Not sure. In my case, in the cold weather it will struggle to reach 76c. Unless I drive for hours on end to get the heat soak into the block. I took a day run up the snow a few weekends back and on the hill climbs it would just reach 75c, on the down hill it went as low as 40c. But during the summer, or even on a nice 25-30c day, doing the same up hill run I would see north of 100c without even pushing it.
If I was smart enough to make up some sort of louvered panel system for the front of the radiator to restrict air flow that would be ideal for the colder months here.

[jff45]

Do you agree that, if it struggles to reach 76, a higher rated thermostat logically won't make it reach 76 any faster?

[mudski]

Do you agree that, if it struggles to reach 76, a higher rated thermostat logically won't make it reach 76 any faster?

If its struggling to reach 76c yeah I agree. Putting a higher rated stat in will just mean the water wont circulate until it reaches it spec'd opening temp. But in TD42 land. Who knows. It may help, it may not.

Just thinking more about it. Maybe, MB's heater core might be partially blocked too, there for restricting water flow through it.

[jff45]

Just thinking more about it. Maybe, MB's heater core might be partially blocked too, there for restricting water flow through it.

Or the flap not correctly directing airflow through it.. I was thinking similar things when I wondered why 76 wouldn’t be warm enough.

[MB]

The heaters centainly not cold sorry gents and just a few weeks ago cleaned the external heater core only too. Just know in my Chev that switching from 75C to 88C made the heater insanely nice jumping back in the cab from say icy paddock work.
It is my belief too that old diesel donks seem to prefer running hotter than 76.5C coasting along at best I’m experiencing this winter.
Our 8.3 work Cummins sits all day on 85C and so too I believe our Louisville tipper.


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[nipagu7]

mudski maybe you have a thermostat that is stuck open , so that in winter the coolant is circulating too fast and cooling the motor down and in summer if the coolant circulates to fast it cannot shed heat quick enough as it moves through the radiator to fast ( although this usually only happens when the thermostat is completely removed ) . mb do you have a cabin pollen filter , just thinking it might be blocked , you might still have reasonable air flow as there might be a bypass around the filter and possibly the heater core , its been a while but when i fitted my cabin pollen filter i think i remember that air was able to flow under it . so basically you might not be getting enough air flow thru the heater core to heat the cabin .

[rusty_nail]

mudski maybe you have a thermostat that is stuck open , so that in winter the coolant is circulating too fast and cooling the motor down and in summer if the coolant circulates to fast it cannot shed heat quick enough as it moves through the radiator to fast ( although this usually only happens when the thermostat is completely removed ) . mb do you have a cabin pollen filter , just thinking it might be blocked , you might still have reasonable air flow as there might be a bypass around the filter and possibly the heater core , its been a while but when i fitted my cabin pollen filter i think i remember that air was able to flow under it . so basically you might not be getting enough air flow thru the heater core to heat the cabin .His Gu doesn't have a pollen filter, I can confirm this as I helped inspect his heater box as a/C drain was blocked. I believe in Australia some on the y61 patrols were never released with pollen filters...

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[nipagu7]

yeah my 2011 gu didnt have a pollen filter so i just bought one and cut the slot out where it goes and it just slides into position . there have been posts about it in the past as others had done it as well . i just thought it might be a posibility as to why mb's heater dosent work ,and on that , how did the heater core look . others in the past have have said that theirs have blocked up and they have cleaned them , some by removing them completely from the car and some whilst it is still in the car although i can't recall how.

[mudski]

mudski maybe you have a thermostat that is stuck open , so that in winter the coolant is circulating too fast and cooling the motor down and in summer if the coolant circulates to fast it cannot shed heat quick enough as it moves through the radiator to fast ( although this usually only happens when the thermostat is completely removed ) . mb do you have a cabin pollen filter , just thinking it might be blocked , you might still have reasonable air flow as there might be a bypass around the filter and possibly the heater core , its been a while but when i fitted my cabin pollen filter i think i remember that air was able to flow under it . so basically you might not be getting enough air flow thru the heater core to heat the cabin .

Nah Ive tried four different brand stats. Same result. currently using a Tridon Hi flow one as it seems to cool faster is the warmer months.

[mudski]

The heaters centainly not cold sorry gents and just a few weeks ago cleaned the external heater core only too. Just know in my Chev that switching from 75C to 88C made the heater insanely nice jumping back in the cab from say icy paddock work.
It is my belief too that old diesel donks seem to prefer running hotter than 76.5C coasting along at best I’m experiencing this winter.
Our 8.3 work Cummins sits all day on 85C and so too I believe our Louisville tipper.


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I will be interesting to see the results if you decide to change it.

[MB]

Back home now to Family GU Land. Certainly was cold Acco 8.3L swagging western goldfields last nights -2C. Coupe clear stars morning dunny dumping buckets froze a 5mm crust :-)
Appears we’re jumping back up into double digit ambient temps finally back here but will still find time next week to muck around with the TD27 88C as first test [emoji106]
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/139.jpg











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[MB]

A quick pot test on the TD27 88C.
(21200-05D12)
Interesting results, isn’t fully open until 98C and fully closed again until 83C.
Was expecting the 83C shutdown (5C below setting) but 97-98C until full open is right up there Russia :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/146.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/147.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/148.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/149.jpg
On the way back down now to 83C fully closed again.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/150.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/151.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/152.jpg


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[MB]

Installed results are in now for the TD27 88C thermostat folks.
A quick snippet below of ambient temps again for not confusing here hot climate TD42 owners.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/153.jpg
Most noticeable was letting it idle for 1 hour after being installed.
It sits exactly on 88C whereas prior would winter idle at 60C as per my previous posts pictures.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/154.jpg
Coasting down big hills here the lowest it would get was 86C whereas previously it could get as low as 56C found.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/155.jpg
Giving it an absolute flogging at horrible 550EGT’s up our biggest hills the highest I could get it was 94C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/156.jpg
Basically cruises along at 100kmph flatish highways at these ambient temps hovering between 88C <>90C depending on pedal load and recovers incredibly quick to 88C.
Heater is insanely good now and I swear this old truck has more responsive power than before up here in this fresh mountain air [emoji106][emoji106]





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[MB]

FWIW: Tested the removed tropical 76.5C thermostat earlier whilst letting the new 88C get up to idle temperature.

Ever so slowly started opening at 77C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/157.jpg
By 84C still had a long way to go.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/158.jpg
Appeared at its max open by 91C
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/159.jpg
Cooling down was still a long way open at 71C
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/160.jpg
Didn’t really look fully shut until sub 68C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/161.jpg

I do have a new spare summer 76.5C that I will test to see its results for comparison ASAP.


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[MB]

Just ran the pot test on a brand new OEM tropical 76.5C.
Nearly identical movement on the rising temperatures as per above although quite interesting that it was at full shut again at 74C unlike the old one at 68C shut!
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/168.jpg
Just goes to show I guess there’s more to thermostats than being black and white issues like full open or shut stuck!
Quite the 6C variance in closing times found here :-(


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[MB]

FWIW: Just ran a final pot test on the TD42 OEM 82C. Dare I say this one might end up being my southern regions winter & summer all rounder choice hopefully[emoji106][emoji106]

Seemed to start opening a whisker late at 84C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/169.jpg
Half open by 88C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/170.jpg
Full open by 92C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/171.jpg
On its way down half open by 80C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/172.jpg
Full closed by 77C again as apparently should be OEM 5C below manufactured opening set temps I believe?
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/173.jpg


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[MB]

One last final check on the old truck currently running the (TD27 88C thermostat) idling away outside tonight with the heater on full tilt and the A/C running with its fan cooling all.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/174.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/175.jpg



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[MB]

Idling with A/C fan off now after 10 mins and its playing 89C <> 87C ping pong :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/176.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/177.jpg



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[MB]

Information Overload:
1st Gear Low Range Test Up/Down Hills
(5kmph @ 2,500rpm each way)

92C up
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/178.jpg

90C down
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/179.jpg

Does seem to be running power wise healthy although as before reckon the 82C Aussie manual spec TS might be the perfect happy medium for us down colder south here?





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[MB]

from the Patrol Manual
79189
.........
..........Cheers Trevor

Trevor Mate tryan277 [emoji106]
Thank you kindly, your top efforts here have helped our family greatly in this quest for warmth [emoji106][emoji106]


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[MB]

To put it in perspective our needs down here :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/180.jpg
Cold steel rolls feeding Mrs MB’s bank managers!
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/181.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/182.jpg
Old mate Blue Del warm waiting back in the truck for Dad to sting his fingers on the heater vents finally [emoji106][emoji106]
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/183.jpg


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[MB]

[QUOTE=mudski;789623]If its struggling to reach 76c yeah I agree. Putting a higher rated stat in will just mean the water wont circulate until it reaches it spec'd opening temp. But in TD42 land. Who knows. It may help, it may not.

......QUOTE]



mudski Mate! I’m too struggling now to fully comprehend why our OEM & Aftermarket tropical 76.5 TS’s both experienced cold winter big downhill runs of 40C for you and experienced also once as low as 56C for me.
Having found now the OEM 76.5C was the only one out of all three OEM’s bought without a ‘Jiggle Pin’ installed is this possibly the issue?
I did notice how incredibly heaps of coolant pissed out (only gravity pressure) of the empty pin hole when popping the housing off for swapping and makes me wonder how many litres per minute are flowing through our radiators down cold highway fast hills even when the 76.5C thermostat is fully closed?
How much flow does a ‘Jiggle Air Pin’ actually hinder in its hole, maybe 50%?
Is your 76.5C aftermarket possibly missing a ‘JP’ too mate?


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[mudski]

[QUOTE=mudski;789623]If its struggling to reach 76c yeah I agree. Putting a higher rated stat in will just mean the water wont circulate until it reaches it spec'd opening temp. But in TD42 land. Who knows. It may help, it may not.

......QUOTE]



mudski Mate! I’m too struggling now to fully comprehend why our OEM & Aftermarket tropical 76.5 TS’s both experienced cold winter big downhill runs of 40C for you and experienced also once as low as 56C for me.
Having found now the OEM 76.5C was the only one out of all three OEM’s bought without a ‘Jiggle Pin’ installed is this possibly the issue?
I did notice how incredibly heaps of coolant pissed out (only gravity pressure) of the empty pin hole when popping the housing off for swapping and makes me wonder how many litres per minute are flowing through our radiators down cold highway fast hills even when the 76.5C thermostat is fully closed?
How much flow does a ‘Jiggle Air Pin’ actually hinder in its hole, maybe 50%?
Is your 76.5C aftermarket possibly missing a ‘JP’ too mate?


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I have the Tridon Hi flow stat in and from memory, it doesn't have the pin hole and/ or the pin.

[MB]

McGoogle a pic of them to double check mate? What’s its code again?


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[mudski]

McGoogle a pic of them to double check mate? What’s its code again?


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This one...
https://www.ebay.com.au/itm/TRIDON-HIGH-FLOW-THERMOSTAT-Y61-Y60-GU-PATROL-TD42-INC-TURBO-DIESEL-99-07/322640818962?hash=item4b1ee43312:g:~hkAAOxy0uZR07V S
Upon closer inspection, I think I can see it, in the centre part of the stat....

[MB]

Certainly does look like it too thanks mate!
If I was a betting man I’d say that’s our cold winter downhill highway issues for sure!
Just looking at the Jiggle Pin here on the OEM 82C & 88C and its tapered to fit very snug under pressure, may only let a very small amount through to our radiators I’d say.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/189.jpg



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[mudski]

I think that is there only to relieve some flow pressure in the rad when the stat is shut. I think. Lol.


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[MB]

Only logical explanation I can see now mate is that a significant amount of coolant does go through that hole witnessed myself and not even under pressure.
All I can say is that the Jiggle Pin on the 88C I’ve just installed must be working as I roll down hills at 86C now instead of 56C before.
That surely has nothing to do with the differing opening temps of either?





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[MB]

For the greater good mudski Old Mate!
Can you please drop in a $45 OEM 82C before our winters almost out now.
(21200-05D02)
I’ll be keeping the TD27 88C in for as long as possible to see what may happen as we approach 30+ ambients again, flip flops awaiting in storage:-)


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[mudski]

It will have to wait unfortunately Mark, as the Patrol is now a daily for the wife as her Mazda 6 is not going. Last thing I want to happen is make the Patrol out of action, I'd be really in the bad books then.

[MB]

Max 30mins full bleed changeover after hours I nuffy promise mate!
Cringing myself thinking of such a beaut TD running 40C then back right up again, can’t be too good brother!!



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[mudski]

Max 30mins full bleed changeover after hours I nuffy promise mate!
Cringing myself thinking of such a beaut TD running 40C then back right up again, can’t be too good brother!!



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Yeah I know. But, unfortunately priorities in life at the moment mean the Patrol see's no love. I have a Red ship box Mazda sitting in the garage i am supposed to fix, but feck knows what I'm even doing with that. Lol. I tried burning it but as we know, shit doesn't burn, so I failed there.

[MB]

What’s a low km TD42Ti donk worth these days mate?
Fark load more than any Zoom Zoom I says :-)


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[MB]

I’m truly shocked now, just back from a north west highway run and cracked the magic 600km for exactly 80L burnt. (13.3L/100km)
I don’t believe this old dinosaur family wagon ever did that even back when it was bog stock with only the factory alloy bar (2,500kg Tare).
Its now got a stupid amount of steel bolted on front/back/sides/top (3,000kg Tare).
Performance wise it honestly feels like its got say an extra 1/2 gear up those dreadful rises near Diggers Rest and Sunbury.
Full mixture today of 80/90/100/110kmph with engine temps 88/89/90/91C.
One more tank fill up and this new OEM TD27 88C thermostat has truly paid for its self folks[emoji106][emoji106]

EDIT: Todays peak ambient temperature pic below for my summer time reference safe storage :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/205.jpg


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[MB]

Half burnt diesel stench has fully gone!
IMHO now these great donks need stabilised much higher temperatures than ever taught before, aim for stabilised 89.99999C averages maybe....?




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[0-TJ-0]

Curious about your results I did some Googleing and I just found a study that compared engine coolant temp to engine performance.. i didn't read the whole thing but flicked to the results and looks like from 60 to 90deg generally speaking fuel usage drops but emissions go up...

Might explain some things. I absolutely wouldn't be surprised if Nissan ran it a bit colder to drop those emissions down a notch.

The study looks very specific but i think it would be a reliable indicator of what you could expect.

I'd be keen to try a hotter stat but i don't know if it would get through summer... I've always wondered about this. I figure technically your cooling system should still be able to maintain 88deg with the same efficiency as it does 76deg.. so really in regards to overheating issues the temp of the stat shouldn't actually matter?

[rusty_nail]

That sounds about right mate, how many car manufacturers have you seen where emmisions get propped up at a cost to performance.

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[mudski]

I know with mine, until the engine reaches operating temp it will puff out a lot more black smoke than usual. My last snow trip past Marysville, the water temps got down as low as 45c on the downhill run and then along the flats out of there it was like puffing billy until the water temps got back up there. The weather is warming so I wont even bother with putting a hotter stat in. But then again, Im curious to see if a hotter stat will benefit or not during the warmer months.

[MB]

What is a TD42’s official operating temp Mark mate? That was one of my first queries I believe?


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[0-TJ-0]

I know with mine, until the engine reaches operating temp it will puff out a lot more black smoke than usual. My last snow trip past Marysville, the water temps got down as low as 45c on the downhill run and then along the flats out of there it was like puffing billy until the water temps got back up there. The weather is warming so I wont even bother with putting a hotter stat in. But then again, Im curious to see if a hotter stat will benefit or not during the warmer months.

This goes along with what I was thinking though.. surely even if you put a hotter stat in the cooling system will still work at the same efficiency.. i.e. you would have the same chance of overheating with a 76deg or 88deg stat.

Yes the water gets warmer in the engine.. but it also has more chance to cool in the radiator..

I've never tested this but it makes sense in my head.

[mudski]

What is a TD42’s official operating temp Mark mate? That was one of my first queries I believe?


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Water temp? What ever the stat is rated at would think.

This goes along with what I was thinking though.. surely even if you put a hotter stat in the cooling system will still work at the same efficiency.. i.e. you would have the same chance of overheating with a 76deg or 88deg stat.

Yes the water gets warmer in the engine.. but it also has more chance to cool in the radiator..

I've never tested this but it makes sense in my head.
Not so much of having more chance once the water cools to the stats range it will shut anyway. So a higher rated stat means it will shut earlier when trying to cool down, only cooling the water in the radiator and not the engine. IF the stat is shut that is. But by then its cool enough anyways.

confusing shite...

[MB]

I think I posted earlier that my 6.5Chev manual clears states its operating temp (water) as 88C and its max at 125C before catastrophic failure I guess:-) It also states other temps like oil etc...
I believe I have read unofficially somewhere that a TD42 max operating temp was something like 117C but buggered if I have been able to find Nissan’s operating temp?
I believe most tropical TD42 drivers with 76.5C thermostats find in reality they run full open and in the 80’s somewhere as a minimum and much higher under demanding conditions anyway?



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[mudski]

I think I posted earlier that my 6.5Chev manual clears states its operating temp (water) as 88C and its max at 125C before catastrophic failure I guess:-) It also states other temps like oil etc...
I believe I have read unofficially somewhere that a TD42 max operating temp was something like 117C but buggered if I have been able to find Nissan’s operating temp?
I believe most tropical TD42 drivers with 76.5C thermostats find in reality they run full open and in the 80’s somewhere as a minimum and much higher under demanding conditions anyway?



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Ah ok... Yeah without looking I think it is 117c is their danger level. I've had mine past that. Dragging the camper through the snowy mountains, crawling up massive inclines near Corryong in 44c temps. Wasn't fun.

[nipagu7]

my brother bought a diesel vw last year and it sits on 99-100 degrees and gets 5 lph . i think that the older cars engines being bigger and not as efficient put out more heat and keeping the engine temps low ( 76d ), in hot ambient temps would make the car more comfortable to ride in and help the air con do its job. i have a mate with a old xp falcon ( no air con ) and it got uncomfortably hot to ride in , so much so that he put insulation on the inside of the firewall and it helped quite noticeably

[MB]

Safe storage note here for oneself look back folks.
Ambient early spring nightfall temps here have happily risen quite a bit :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/09/23.jpg
A/C fan on demisting/cooling engine bay at idle for 30mins seems to have come up to 87-89C ping pong compared to frigid nights prior pictured before at 82C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/09/24.jpg
A/C fan off for a further 20mins and seems to ping pong between 88-89C.
http://www.nissanpatrol.com.au/forums/images/imported/2019/09/25.jpg
Gave it a good flogging this afternoon up our local test hill to reach 550EGT’s and scored 93-94C at best before coasting down the other side back to 87C amazingly quickly.





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[MB]

Finally some half decent weather down here earlier today to record some more TD27 88C winter thermostat findings in the old TD42Test.
https://uploads.tapatalk-cdn.com/20190920/a67959722710628b852525eb96618665.jpg
As per last highway runs record it appears to have now increased all numbers by approximately 1-2C.
So previous range of 80/90/100/110kmph with temps of 88/89/90/91C have today now jumped to 89/90/91/92C and a sneak into 93C at one short blip up and back.
Off highway/freeway gave it another top flogging 575EGT’s up our test hill and did manage to score 96C briefly.
Not too stressed at this stage as previous 88C TS pot tests showed full open wasn’t until 98C.
EDIT: Idle has now come up to 89C too IIRC



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[MB]

Diesel use may or may not have gone up a whisker just found, although approximately 25% of Friday’s test were start/stop traffic and some local highway bigger hills yesterday.
Fill up: 292kms for 42L to the brim. (14.38/100km)


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[Winnie]

What about this for something different MB? Have read lots of good things about using these in TD42s as they block the bypass hole which means the hot water doesn't circulate until the thermostat opens at a rated 82C.
https://www.4x4andcamping.com.au/products/dayco-dt79a-thermostat-suits-nissan-patrol-td42

[MB]

Thanks mate appreciated, did see on another Google forum them being used with good success it seemed. Have been very happy with the OEM 88 over the tail end of winter, may have to trial the OEM 82 I have ready in the back when it hits summer possibly.

EDIT: Apologies Chrisso mate, should have mentioned I’m now trying to OEM test everything first as a base point (including the bog stock plastic air dam underneath kept In situ etc...
Will be adding an intercooler to the old family faithful TD42T before years end too, just don’t want to skew results atm :-)

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[MB]

Just found I believe an OEM quirky behaviour on these ‘Jiggle Pin’ equiped 88 & 82 thermostats folks:
http://www.nissanpatrol.com.au/forums/images/imported/2019/09/139.jpg
A good quick water pump cavitation rev after say 30 minutes left alone and can only assume it is Jiggle seated again from stable 89C results found again for 30 minutes thereafter.
http://www.nissanpatrol.com.au/forums/images/imported/2019/09/140.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/09/141.jpg



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[Hodge]

Love your work good Marko ! While most are trying to stop the kettle from whistling , you're fueling the fire!! Haha [emoji1][emoji106]
I've subscribed!

I've read this post start to finish. I'm glad it's not only me that thought , sometimes when the temps are up she seems to sing better and feel smoother ... [emoji848].

For what it's worth ... I recall walking into Patrolapart when I bought a box of goodies for my cooling system makeover.
And after a brief conversation about the infamous dreaded long bolt in thermo housing , he asked why I went for the 76 thermostat. I disregarded his question with a dopey "cooler is better" mindset... Thinking of it now , he may have tried to sway me for a upper centigrade unit.

Mine cruises 78-80 most of the time and without load , always defaults to its 76C groove (idling) no matter what ambient temps are doing .

I really have to whip it good and proper to reach 90 or beyond , by which time egts are pushing the 500C spectrum , where I usually back off , and then temps once again fairly quickly reset to 76c range ...

I don't tow. So I don't know how it would behave in that scenario.


Just a sub-curious-question.
I wonder.
Would a thinner oil in winter and thicker in summer months play much part in this cooling game ?

http://www.nissanpatrol.com.au/forums/images/imported/2019/09/142.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2019/09/143.jpg

[nissannewby]

Around 92 degrees is the sweet spot for performance

[Touses]

Around 92 degrees is the sweet spot for performance

And there is the definitive answer. Thanks bloke, on song as always.

Like you Hodge I can't flog mine much past 80, even towing and prior to the tune it barely touched 82 and maxed 450egt. W2A IC I'm guessing.
Time to source the higher deg TS.

Big thanks to MB for his diligent research.

[MB]

Thanks Matty, really appreciated mate!
Most welcome Touses mate!



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[MB]

Touses mate, I think I’m thankfully ready to move ahead now and start looking at intercooler options for our old TD42T to try and heavy hauling tame factory Exhaust Gas Temperatures (EGT).
Just wondering what brand Water to Air (W2A) system you might be running please mate?
Have only briefly looked online at PWR, Plazmaman, Frozen Boost to date.
Hoping W2A might be a good option for us too down here in the frosty mountains.
Have decided now to keep the bonnet stock looking to draw less attention found recently to modifications so that rules out for us a Top Mount Intercooler (TMI) Air to Air (A2A).
Also thinking that a W2A front mounted full size slimline radiator might help incoming sleet and snow better than a half size Front Mounted Intercooler (FMI)(A2A) ?
Any advice appreciated thanks mate!







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[Touses]

MB I'm running a frozen boost type 10 (I think), water cooling is achieved by 2 10" craig davies strapped to a radiator thingy that I think is an evaporative unit from a tractor AC.
That lot is mounted under the tray along with a bosch water pump and fans and pump are switched from the dash. This to facilitate warming the great silver frog on chillyish QLD
winter mornings. Have a temp sender in filler on the IC itself, dash mounted gauge to monitor. With the unit working the gauge needle doesn't move.
Will endeavour to dig out the pics of the setup over the weekend. Did have to body lift by 1" to clear the IC/ plennum under the bonnet.
nissannewby is the go to man for the plennum if you go down that route. Keep in mind you've just done the hard yards on the TS research to get your unit to operating temp.
I'm convinced the W2A makes mine run too cold so will try higher rated TS.

[MB]

Awesome info, thanks very much mate!


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[MB]

Back home out of the old Acco now mate, apologies for the one liner reply earlier today.
Any pictures when time permits and findings on your new thermostat of choice 88/82C would be greatly appreciated [emoji106][emoji106]
I’ll hide the credit card away from my late night self until I kindly hear your W2A + TS success hopefully!


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[MB]

We just jumped across a few dozen hills onto the Western Ring Road for a 100kmph straight blast down to Werribee and back.
181km for 23.1L used (12.76L per 100km)
More or less water temps smack on 92C the whole way on the highway.
(100kmph @ 2,150rpm with 3.9 stock highway diffs powering 285/75r16 KM3 M/T’s @ 3,000kg GVM)
Really does appear that 92C is its “sweet spot” many thanks nissannewby mate!
http://www.nissanpatrol.com.au/forums/images/imported/2019/10/4.jpg




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[Cremulator]

So that was using the 88°c or 82°c thermostat @MB?

[MB]

The TD27 88C mate [emoji106][emoji106]


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[Hodge]

Good to hear the feedback MB !

I just done a round trip to mt dissa and tallarook and lugged the ol girl up the hume fwy hills good and proper and could not get her above 88. No way known. That was battling a reasonable headwind too heading north on a 76 thermo.

I think next chill season a higher thermo is in order.

[MB]

Most welcome Hodgey mate!

I was experiencing a few months ago IIRC a max of 88C exactly too with the 76.5 TS and our 2.0T tipper trailer on tow along a similar highway.
I was honestly sceptical about this 88C TS for summer time 35+ ambient temps but are somewhat hopeful now it might still actually work all year round?
I’m very glad that Mat has kindly mentioned 92C as a sweet spot and are a lot more relaxed now knowing since its pot test conducted that it doesn’t fully open until 98C.
In theory we still have a fair way to go and can’t wait for summer to hit properly down here as it has been a long cold slightly wetter winter for once thankfully!


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[Hodge]

Kind of sort of maybe possibly related to yours truly MB!
I stumbled upon a mechanic, engineer or whatever theyre called nowdays, having smoko at Newport railway maintenance yards down there this morning. I curiously asked why theres always Pacific National diesel-elecy units sitting there with high RPM, their gaskets being revved off just about any time you drive near there... Even though they're not tugging anything.
It's as if he read this thread, and his reply was on point!
They maintain a critical operating temperature of the engine, where the oil does it's job at its finest which creates a most efficient power level. Just like Mat mentioned, this "Sweet spot" ?!

Even when only "idling" it's more efficient for them to run it high to hold a temperature, because if it revs down below this temperature threshold , due to the size of the engine, revving it even higher to get back up to the efficient temperature just wastes time and fuel.

He also said, there is a minimum temp. they HAVE to reach and sit at before throttled up out of load. Otherwise it cant be RPM-ed higher.
Apparently from a cold start to reach this, sometimes they sit there for 60-90 minutes.

Would be nice to have 3000-ish HP in a TD like they do.... :D or 2200kW the generators create.

[MB]

Sounds like a plan, Cheers Hodgey mate!


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[MB]

Somewhat irrelevant to thermostats folks, big believer in stock designed positive/negative air pressure zones now.
Many a great sand driver folks hate these ‘Air Dams’ as they ‘rip off’ when reversing have read but do believe down here they are integral for our highway needs.

EDIT: Mrs MB’s near stocky dam :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/10/138.jpg

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[MB]

We gave the old family wagon another good float work out this afternoon hauling Mrs MB’s young Clydesdale Cross (650kgish) up up over and across to Mansfield flatter valley ways for training.
Redarc alarm EGT’s on the stock TD42T are absolutely annoyingly and we are deliberately dropping cogs to keep under 575C up hills although very happy water still will not currently break 95C with some 3C to go until fully open on the TD27 88C thermostat so far found good folks!





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[mudski]

Somewhat irrelevant to thermostats folks, big believer in stock designed positive/negative air pressure zones now.
Many a great sand driver folks hate these ‘Air Dams’ as they ‘rip off’ when reversing have read but do believe down here they are integral for our highway needs.

EDIT: Mrs MB’s near stocky dam :-)
http://www.nissanpatrol.com.au/forums/images/imported/2019/10/138.jpg

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I put that back on mine, did absolutely nothing to help the kettle from boiling.

[MB]

We should definitely park our family wagons side by side together one day Mark mate. I’m wondering if there is possibly any slight set up differences on the ZD30 conversion TD’s or are they all same same radiators, cowlings, rubber and plastic bits everywhere etc....?


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[Winnie]

I reckon it's time to put an intercooler on the GU Markie

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[mudski]

We should definitely park our family wagons side by side together one day Mark mate. I’m wondering if there is possibly any slight set up differences on the ZD30 conversion TD’s or are they all same same radiators, cowlings, rubber and plastic bits everywhere etc....?


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Mines all TD under the hood mate. I made sure of this.

[mudski]

I reckon it's time to put an intercooler on the GU Markie

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Yeah definitely. Fairly low cost and we can make a weekend of it at your place for the install. :D

[MB]

Success....finally managed to just get the 88C thermostat to fully open up on our steppest test hill home bound.
http://www.nissanpatrol.com.au/forums/images/imported/2019/10/222.jpg
Our ambient temps have finally snuck a whisker over 30C and deliberately ran this test with A/C on flat out today.
http://www.nissanpatrol.com.au/forums/images/imported/2019/10/223.jpg
Coasting back down the other side she’s straight back to 89C so pretty happy with that.
http://www.nissanpatrol.com.au/forums/images/imported/2019/10/224.jpg
Bring on the hotter weather now as last summers max coolant temp was 98C too IIRC with the old 76.5C thermostat.
Here’s hoping that the factory blocked Jiggle Pins on these 82&88C thermostats although fantastic in winter hopefully don’t hinder over summer.


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[MB]

Haven’t driven the old family GU faithful truckster for a little while now as was away working with the GQ almost as much loved kettle up north until this warming last weeks home. Scored a 39C ambient GU temp test day yesterday for a blast up our home test hill still on the Russian 88C winter TS as installed before.
http://www.nissanpatrol.com.au/forums/images/imported/2019/12/136.jpg
Finally managed to sneak a new 2019 record of 99C on this hill top once eased off the peddle with heatsoak and it blipped up there for a fleeting full open few seconds before back to old 76.5C TS same same too max of 98C summer found for us last year on the brand new then OEM radiator.
http://www.nissanpatrol.com.au/forums/images/imported/2019/12/137.jpg
Best I can nuffy understand from findings now is that regardless of purchased OEM thermostat settings the summer time ‘max’ temps in this wagon don’t seem to alter although the rest of the years warmer and down to seriously colder ambient temps hug so so much closer to healthier running temps of 88C + I smell and find much betterer :-)
Really keen for anyone please to trial the OEM 82C (apparently Aussie manual spec) version to see if they can achieve similar‘stability’ instead of huge ‘fluctuations’ as what originally did scared me and these beloved donks we have!
IMHO now: “It’s all in our cooling systems overall health”
~MB :-)






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[Cremulator]

Haven’t driven the old family GU faithful truckster for a little while now as was away working with the GQ almost as much loved kettle up north until this warming last weeks home. Scored a 39C ambient GU temp test day yesterday for a blast up our home test hill still on the Russian 88C winter TS as installed before.
http://www.nissanpatrol.com.au/forums/images/imported/2019/12/136.jpg
Finally managed to sneak a new 2019 record of 99C on this hill top once eased off the peddle with heatsoak and it blipped up there for a fleeting full open few seconds before back to old 76.5C TS same same too max of 98C summer found for us last year on the brand new then OEM radiator.
http://www.nissanpatrol.com.au/forums/images/imported/2019/12/137.jpg
Best I can nuffy understand from findings now is that regardless of purchased OEM thermostat settings the summer time ‘max’ temps in this wagon don’t seem to alter although the rest of the years warmer and down to seriously colder ambient temps hug so so much closer to healthier running temps of 88C + I smell and find much betterer :-)
Really keen for anyone please to trial the OEM 82C (apparently Aussie manual spec) version to see if they can achieve similar‘stability’ instead of huge ‘fluctuations’ as what originally did scared me and these beloved donks we have!
IMHO now: “It’s all in our cooling systems overall health”
~MB :-)






Sent from my iPhone using TapatalkFunny you should mention someone else trialling a 82° thermostat @MB, I just picked one up from Nissan on Wednesday [emoji6][emoji106]http://www.nissanpatrol.com.au/forums/images/imported/2019/12/138.jpg
I was thinking of fitting it as we move out of summer though.

[MB]

Don’t be a pussy, stick it in now for comparison clarity Cremulator mate [emoji106][emoji106]


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[0-TJ-0]

Still got that 82deg MB ? I'll send you some $ and give it a run if you do.

[MB]

Sorry TJ, just installed it last week mate in a work GQ. Can’t really tell what it’s doing yet as the old ute only has an OEM gauge at the moment.


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[MudRunnerTD]

Interesting thread MB. Nice one mate. So just fitted the 79c with the quikaz fan and hub. In have also just fitted the redarc guage you have which will give me insight into the water temps. I will have to get to k now tgis engine all over again now as this is a game changer. I think it 8s going to do my head in for a while though.

[0-TJ-0]

Interesting thread MB. Nice one mate. So just fitted the 79c with the quikaz fan and hub. In have also just fitted the redarc guage you have which will give me insight into the water temps. I will have to get to k now tgis engine all over again now as this is a game changer. I think it 8s going to do my head in for a while though.

Is that the genuine 79deg stat your putting in or the dayco one from qikazz? I just ordered the dayco one from qikazz to give that a try. My temps aren't too bad most of the time just looking for a bit more stability and a scooch higher than the 74deg I saw it get down to on the down hill runs yesterday :/

[Winnie]

Is that the genuine 79deg stat your putting in or the dayco one from qikazz? I just ordered the dayco one from qikazz to give that a try. My temps aren't too bad most of the time just looking for a bit more stability and a scooch higher than the 74deg I saw it get down to on the down hill runs yesterday :/I've just put the Dayco t/stat in, as well as a new water pump, new radiator and the Qikazz fan/hub. Haven't driven on it yet, towing the van up to east Gippsland next weekend though so that will be a good test.

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[0-TJ-0]

I've just put the Dayco t/stat in, as well as a new water pump, new radiator and the Qikazz fan/hub. Haven't driven on it yet, towing the van up to east Gippsland next weekend though so that will be a good test.

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Let me know how it goes. I've just put the new hub and fan in and love it. Temp still slowly climbs on those big hills towing a 2 ton camper but much slower than it used to.. and drop it back to 3rd and than fan roars and temps drop. Brilliant. I'm happy with the overall cooling for now, I'd just like the default temps to be a bit higher and more stable, will stop me watching it so much haha.

[MudRunnerTD]

Is that the genuine 79deg stat your putting in or the dayco one from qikazz? I just ordered the dayco one from qikazz to give that a try. My temps aren't too bad most of the time just looking for a bit more stability and a scooch higher than the 74deg I saw it get down to on the down hill runs yesterday :/

The dayco from quikazz. Now need to re learn the car with an accurate temp guage.

[MudRunnerTD]

Haven’t driven the old family GU faithful truckster for a little while now as was away working with the GQ almost as much loved kettle up north until this warming last weeks home. Scored a 39C ambient GU temp test day yesterday for a blast up our home test hill still on the Russian 88C winter TS as installed before.
http://www.nissanpatrol.com.au/forums/images/imported/2019/12/136.jpg
Finally managed to sneak a new 2019 record of 99C on this hill top once eased off the peddle with heatsoak and it blipped up there for a fleeting full open few seconds before back to old 76.5C TS same same too max of 98C summer found for us last year on the brand new then OEM radiator.
http://www.nissanpatrol.com.au/forums/images/imported/2019/12/137.jpg
Best I can nuffy understand from findings now is that regardless of purchased OEM thermostat settings the summer time ‘max’ temps in this wagon don’t seem to alter although the rest of the years warmer and down to seriously colder ambient temps hug so so much closer to healthier running temps of 88C + I smell and find much betterer :-)
Really keen for anyone please to trial the OEM 82C (apparently Aussie manual spec) version to see if they can achieve similar‘stability’ instead of huge ‘fluctuations’ as what originally did scared me and these beloved donks we have!
IMHO now: “It’s all in our cooling systems overall health”
~MB :-)






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Hey mate, you know how your a bloody rippa Bloke. Did you by chance fit the Black control box for your gauge is an easily accessible location? Yesterday during the install i accidentally closed the bloody drivers door while the loom was hanging out and destroyed the black plug that goes into the black box. damn it. Looking like it is not available and i need to make something work. I was at Gauge Works Geelong today hoping i could just buy a black plug and re-pin it but no joy. He said it may well be a common plug for the back of a stereo and suggesting i go to a wrecker and see if i can find something to suire and then re-pin it.

I really need a couple of photos of it to be honest. and also very important, i need a good photo of the pin layout so i can re-pin it. I think it is a 4 wire but 8 pin connection.

In fact anyone with a Redarc 3 way gauge like this i would appreciate any help you have. Will make a call to Redarc tomorrow but not sure they will help. Surely im not the first person to do this. To my astonishment the plug is made from a very brittle hard plastic rather than a Urethane Resin and has just disintegrated.

[Cremulator]

Is this what you need?
You can download the manual from their site: https://www.redarc.com.au/egt-boost-pressure-52mm-gauge-with-optional-temperature-display
Just underneath the price is the PDF.http://www.nissanpatrol.com.au/forums/images/imported/2020/02/93.jpg

[MudRunnerTD]

Is this what you need?
You can download the manual from their site: https://www.redarc.com.au/egt-boost-pressure-52mm-gauge-with-optional-temperature-display
Just underneath the price is the PDF.http://www.nissanpatrol.com.au/forums/images/imported/2020/02/93.jpgCheers mate. Yeah I have that manual in hard copy.

No no have fully SMASHED this plug damn it. Beyond recognition. All the pins are safe but now out of casing. I need a new plug blank then re pin it.

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/94.jpg




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[Cremulator]

Cheers mate. Yeah I have that manual in hard copy.

No no have fully SMASHED this plug damn it. Beyond recognition. All the pins are safe but now out of casing. I need a new plug blank then re pin it.

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/94.jpg




Sent from my SM-G977B using TapatalkAhh that plug. I was thinking one of the ones that went into the back of the gauge.
See what redarc say tomorrow, they've been great when I've dealt with them on the phone about warranty returns and picking their brains on wiring my temperature probe switch.
I'd be surprised if they didn't have a replacement plug they'd sell you. I'd assume it will be pricey though.
I'm gonna guess $16 [emoji6]

[MudRunnerTD]

Ahh that plug. I was thinking one of the ones that went into the back of the gauge.
See what redarc say tomorrow, they've been great when I've dealt with them on the phone about warranty returns and picking their brains on wiring my temperature probe switch.
I'd be surprised if they didn't have a replacement plug they'd sell you. I'd assume it will be pricey though.
I'm gonna guess $16 [emoji6]

Hahahaha!!! TAKE MY MONEY!!


$16 will be a Bloody Bargain mate!!! Better than $450 for a new gauge!!

[Cremulator]

Haha for sure ;)
Here you go MudRunnerTDhttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/95.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/96.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/97.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/98.jpg

[MudRunnerTD]

Ahh that plug. I was thinking one of the ones that went into the back of the gauge.
See what redarc say tomorrow, they've been great when I've dealt with them on the phone about warranty returns and picking their brains on wiring my temperature probe switch.
I'd be surprised if they didn't have a replacement plug they'd sell you. I'd assume it will be pricey though.
I'm gonna guess $16 [emoji6]

So i called Redarc directly today and they will sell me the Loom for this plug. Wait for it................................$16 It is in the Mail!!

[MudRunnerTD]

Haha for sure ;)
Here you go MudRunnerTDhttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/95.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/96.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/97.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/02/98.jpgWow. Thanks awesome.

So how smart was Luke at Geelong Gauge Works. Showed him the drawing in the manual and told him it was an 8 pin from memory. He went out to his shed and called me in a couple of minutes later and said does it look like that??? Common plug out the back of a stereo in a Holden barina and alike. Search the wreckers with a pair of side cutters

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/99.jpg

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/100.jpg

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/101.jpg

He did well. For $16 I will take a new Loom though. Thanks for your help.

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[Cremulator]

So i called Redarc directly today and they will sell me the Loom for this plug. Wait for it................................$16 It is in the Mail!!Classic. What a guess!!
[emoji23]
I based that estimation on the $50+ they charged me for an 1/4" stainless EGT bung.

[Cremulator]

Wow. Thanks awesome.

So how smart was Luke at Geelong Gauge Works. Showed him the drawing in the manual and told him it was an 8 pin from memory. He went out to his shed and called me in a couple of minutes later and said does it look like that??? Common plug out the back of a stereo in a Holden barina and alike. Search the wreckers with a pair of side cutters

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/99.jpg

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/100.jpg

http://www.nissanpatrol.com.au/forums/images/imported/2020/02/101.jpg

He did well. For $16 I will take a new Loom though. Thanks for your help.

Sent from my SM-G977B using TapatalkExcellent. Good to know it's a common plug & well done locating one at the wreckers [emoji106]

[Touses]

Quick update here.
Mechanic refused to swap out ts to 82 from hi flow 76 citing the load with the backpack aboard. Fair point.

So, on my annual Grumpyclaus run, Warwick, Tweed Heads etc from Childers, I reckoned to really test it, albeit running empty.
Away about midday, ambient temp here high 30's. Southwest to Yarraman and then directly west toward Toowomba. Temps never over 80. Egt's steady around 350.
Up the range from Yarraman at Thornville. Ambient temp 40+, flogging it all the way 110k plus.
Finally pushed it to 92 and egt's to 550. But seriously had to flog it, fuel gauge hated me.
Upshot, still thinking higher rated TS required.

MB can't find the pics of full intercooler setup, will grab the camera over the weekend.

[mudski]

Quick update here.
Mechanic refused to swap out ts to 82 from hi flow 76 citing the load with the backpack aboard. Fair point.

So, on my annual Grumpyclaus run, Warwick, Tweed Heads etc from Childers, I reckoned to really test it, albeit running empty.
Away about midday, ambient temp here high 30's. Southwest to Yarraman and then directly west toward Toowomba. Temps never over 80. Egt's steady around 350.
Up the range from Yarraman at Thornville. Ambient temp 40+, flogging it all the way 110k plus.
Finally pushed it to 92 and egt's to 550. But seriously had to flog it, fuel gauge hated me.
Upshot, still thinking higher rated TS required.

MB can't find the pics of full intercooler setup, will grab the camera over the weekend.

Fark if my egts got to 550 I would have seen 120c easily on water temps.


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[Touses]

Fark if my egts got to 550 I would have seen 120c easily on water temps.


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550 is the highest I've seen. Have had it to 500 prior, back pack on, fully provisioned and loooong uphill drag, temp no more than mid 80's.
Would put it down to the custom built rad', high flow ts and the W2A ic.

Really must bring my build thread up to date. Got lots of piccies on this 'puter, somewhere!!

[Cremulator]

I replaced my factory 76.5°c thermostat with the 82°c unit from Nissan.
I drained about 2L of coolant from the bottom of the radiator and that was enough to clear the thermostat housing.
http://www.nissanpatrol.com.au/forums/images/imported/2020/10/66.jpg
On removal of the old 76.5 it appeared to be damaged.
The bottom looked bent and there was a scuff/indent on the base.
http://www.nissanpatrol.com.au/forums/images/imported/2020/10/67.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/10/68.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/10/69.jpg
I'm not sure if it was having an effect on the temperatures.
Here it is in February this year on a day that was about 30°c, stationary, and it was sitting around 72°c.
http://www.nissanpatrol.com.au/forums/images/imported/2020/10/70.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2020/10/71.jpg
Old thermostat.
http://www.nissanpatrol.com.au/forums/images/imported/2020/10/72.jpg
New one.
http://www.nissanpatrol.com.au/forums/images/imported/2020/10/73.jpg
I'll see how the new 82c one goes over summer as the weather warms up here in Vic.

[MB]

Great to see you’re having a mythbusting crack too Crem Mate!
Really keen to hear your fuel economy picks up by some hopeful near 10% too running hotter they seem to love found too Brother [emoji106][emoji106]


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[Cremulator]

Yeh I'll be very interested to see how the fuel economy goes. I've just filled the tank too, so this will be good timing.

Interestingly I drove it today, unloaded, no passengers, almost no incline in the terrain and it got to 77°c pretty easily.
Short trip, but I'll test it more over the next few weeks.

[MB]

Something aint right there Crem Mate!
Too short of a trip agreed, leave it in your driveway for 20-30 say minutes idling and in theory it should hover as naturally close to installed 82C as planned?
Upon takeoff driving your accurate Redarc should see a spike higher until she opens a wee bit more before dropping to stabilise there on a few degrees higher hopefully [emoji106][emoji106]
I LIKEY 92C average in our TD42’s :-)


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[Cremulator]

I did have to shut it off before I was able to test of the temp got any higher as I arrived and couldn't let it idle, but I will certainly test that recommendation and see what it does MB [emoji106]

[Cremulator]

Here is an update of my experience in switching from a factory 76.5° thermostat to a 82° thermostat on my 2004 GU III TD42ti.
I've been logging the fuel consumption and keeping an eye on the operating/peak temperatures.
This is the last four full tanks of fuel before and after I changed thermostat:

With factory 76.5° thermostat
2020/03/05 – L/100km: 14.27 trip: 562km

2020/03/19 – L/100km: 13.54 trip: 618km

2020/05/27 – L/100km: 13.81 trip: 571km

2020/07/11 – L/100km: 13.16 trip: 608km

— 589.75km average

Installed 82° thermostat 15th Oct 2020
2020/10/06 – L/100km: 13.59 trip: 568km

2020/12/23 – L/100km: 13.74 trip: 536km

2021/01/22 – L/100km: 12.87 trip: 621km

2021/03/01 – L/100km: 12.69 trip: 648km

— 593.25km average

These have been general use around town as well as some trips away, but nothing more than 4 passengers and belongings without a roof rack.
So relatively light load on the vehicle.

Here are some temperature photos of the water temp and ambient temp with the 76.5° thermostat.
https://uploads.tapatalk-cdn.com/20210416/b999eeb7ab60f424b98d9134de31b488.jpghttps://uploads.tapatalk-cdn.com/20210416/cd5a0b9fc022adc8ac3309828aef5955.jpg
And the same once I switched to the 82° thermostat with a similar ambient temperature.
https://uploads.tapatalk-cdn.com/20210416/39a8b7821bd470f3adcb687d66f065da.jpghttps://uploads.tapatalk-cdn.com/20210416/efabbe51ec639e6587cc9c9cfa1e740d.jpg

[MB]

Job well done Ash Mate, Together we’ll all solve this 76.5 TC Tropicalals [emoji23] [emoji907]
Victorian winter approaching, bang in a UK/Russian OEM 88C and watch your clean system temps fluctuate stable between 88-96C with 92C average saving you almost 50km per OEM tank fill [emoji1696][emoji123][emoji106][emoji106]


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[Cremulator]

I am very tempted to do just that @MB.
Next on the cards is EGR block as I have that piece waiting.
I'll have to order a 88° thermostat from Nissan [emoji106]

[MB]

One step/reduction at a time ASH Mate!
Please don’t bastardise your GU Faithful Beauty [emoji3590][emoji106][emoji106]


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[Cremulator]

So you are saying don't do too much in one hit as that will basterdise it, or doing certain things will basterdise it?
[emoji848]http://www.nissanpatrol.com.au/forums/images/imported/2021/04/254.jpg

[MB]

One modification at a time Ash Mate, document findings, then go next steps with clarity of what is and isn’t working.
Have never found the need for the blanking plate although I think they’re only for the TD42Ti variants?


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[Cremulator]

Gotcha [emoji6] my thoughts exactly.
Yeh possibly it only really benifits the TD42Ti, but I'll throw it in, run a few thanks of fuel through it and see how the numbers stack up. Easily reversible if it's not helping [emoji106]

$6 for the blanking plate from eBay too [emoji108]

[MudRunnerTD]

Well the good news is that all three appear to have identical dimensions including the TD27 88C according to the verniers.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/129.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/130.jpg
Only difference I can find under poor light is that both the 82C & 88C have the ‘Jiggle Pin’ and rubber gaskets whereas the 76.5C does not have either.
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/131.jpg
http://www.nissanpatrol.com.au/forums/images/imported/2019/08/132.jpg




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So I tried to get an after market 88c thermostat last week and found a part number but would have to order it in. I though bugger that will go to Nissan and get a genuine.....

Just went to Werribee Nissan and gave him this part number. No Stock Anywhere in the Australian Network... I will check PaP and then consider an aftermarket I suppose. AB I will let you know of i find one!!!

[MudRunnerTD]

Ok PaP don't have anything with that part number and don't have anything with 88c for a TD. He had an 82c.

MB where did you get that 88c from mate?

[MB]

I’ll head down the line later this arvo and see if our Nissan has them hiding out back still Daz, it’s where I bought all 3 from for these tests above.


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[MB]

None on the shelf out back here either sorry Daz:

http://www.nissanpatrol.com.au/forums/images/imported/2022/08/1.jpg

I’ve ordered us 4 from Japan, ETA 4 weeks Mate:

http://www.nissanpatrol.com.au/forums/images/imported/2022/08/2.jpg


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[mudski]

Ok PaP don't have anything with that part number and don't have anything with 88c for a TD. He had an 82c.

MB where did you get that 88c from mate?

https://www.amayama.com/en/part/nissan/2120005d12
Wont get it as fast but its a bucket load cheaper.

[MB]

Oh well, after a due diligence pot test prior to installation one could piff the Genuine failure at Barry down the line….in person [emoji23]


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[MudRunnerTD]

https://www.amayama.com/en/part/nissan/2120005d12
Wont get it as fast but its a bucket load cheaper.

Cheers mate. All good. Deal is done and it's not sheep stations. Happy days.

[MB]

[emoji106][emoji106]