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Thread: TD42 - All Variants Aussie Water Thermostats

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    TD42 - All Variants Aussie Water Thermostats

    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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    Last edited by MB; 16th August 2019 at 11:04 PM.

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    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.
    2003 GU TD42 with a few extra ponies

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    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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    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-Th...oAAOSw1B1c2-ZM

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    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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    from the Patrol Manual
    patrol thermostat.jpg
    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

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    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
    Last edited by mudski; 17th August 2019 at 11:46 PM.

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


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    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.
    John

    2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body

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    TD42 - All Variants Aussie Water Thermostats

    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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    Last edited by MB; 18th August 2019 at 04:46 PM.

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