Hodge's new 4.2

[threedogs]

Thanks Mat. I know it's fine and temps are low, I'm just puzzled why its showing 70 max. I mean surely this thing runs in the high 80s especially day like today. Hope the ECU talk cable arrives soon so that I can compare the pair.

Mine takes a very long time for the temps to get to 85 maybe a 15 k drive,
Thats on the Ecu[talk the factory gauge shows less than half about 1/3rd after
3Ks.
Being a very hot day I would have thought 85-87 would be the norm.

[nissannewby]

Have a look in your owners manual. What does it say about operating temp and the factory gauge?

[Hodge]

Owners book doesn't mention specific temps. Only shows whats normal on the gauge and whats "oh shit" range.

[nissannewby]

So your right in the middle of the normal range? No problem that I can see. The problem with the factory gauge is it can take quite a variance in temperature before it starts to show its getting towards hot. By having the aftermarket one in there you can see what the temp is doing. Although it may read slightly low at normal temp you might see 90 degrees or even 100 degrees before the factory gauge moves. Now that you can see what the temps are doing you can alter your driving accordingly before it gets to high. With only the factory gauge by the time it moves it could be to late and you may need to stop to let it cool etc.

[Rocket55]

I took mine for a spin out to Bathurst and back yesterday, 250km each way up over the Great Dividing Range and basically it sat between 65-75 the whole way. Out near Lithgow on the back of the ranges there's a section that's 110km, so 110 I did straight up the hill in 5th at about 20 psi. EGT's were about 400 air temp about 25 and the VDO gauge made it to 80. If this is true I'm seriously happy as the hill was about 1km long. Coming home there is a couple of long up hill pulls, realatively steep, pre mods this had me back to 4th full throtle and dropping back to about 85-90km, so this time up I go in 5th at about 105km, accelerated beyond that a few times to pass cars, temps got up to around 80-85, air temp high 20's. PS: loving the power... Cruising down the hill saw temps around 60-65 quite often, occasionally going to 70. I've read lots of reports of these things running mid to high 90's just cruising along at 100-110, at these speeds on the flat I'm barely seeing 70. So I'm really stumped on whether the gauge is reading right or it's just running nice and cool. I fear the first is true, whilst secretely hoping for the second.

[threedogs]

I reckon Cuppa could add another temp for you.

[jff45]

Rod, in my opinion, either your gauge isn't reading correctly or there's an issue with your thermostat. If you have a 77 degree thermostat, for example, your temps shouldn't go below that once you're at operating temperature.
It's the thermostat's job to maintain temps, at least, at its rated temperature. When it can't, temps rise.

I have a new 77* Tridon thermostat, new Ebay alloy rad, new genuine water pump. My temps hover around 79-80 90% of the time.
As I've just installed the engine and haven't yet done 2000 kms with it, I'm watching my Ecutalk constantly. By far the most common temp I see when I glance at it is 79*.

[Hodge]

Cooler day this morning so my redarc gauge now read between 60-65°C. Compared to the other day when it was 40°C ambient and it maxed out at 70°C.

So, I Just tested the gauge/sensor in water, up against 3 different thermometers across 3 different temperature ranges.
They were all within 1°C of each other. The redarc gauge is accurate within to 0.5°C on average...

So, I'm happy that my engine maybe running that cool..... but puzzled, how the hell can my coolant no go above 70°C, on a 40°C day ..... Surely the cooling system of this thing cannot be that good. Even with thermostat fully open...

Now i'm really looking forward to my ECU talk arriving.

[threedogs]

What is the temp range of the thermostat you have in now??
That would be your starting point.
Also grab a thermo gun and point it to the top tank
see what that reads.
Thats what Norm from Aussie coolers did when I was having trouble with my conversion,
I have one here and very accurate IMO

http://www.ebay.com.au/itm/Neu-Origi...iYoaz-sRlo-u8Q

[jff45]

Cooler day this morning so my redarc gauge now read between 60-65°C. Compared to the other day when it was 40°C ambient and it maxed out at 70°C.

So, I Just tested the gauge/sensor in water, up against 3 different thermometers across 3 different temperature ranges.
They were all within 1°C of each other. The redarc gauge is accurate within to 0.5°C on average...

So, I'm happy that my engine maybe running that cool..... but puzzled, how the hell can my coolant no go above 70°C, on a 40°C day ..... Surely the cooling system of this thing cannot be that good. Even with thermostat fully open...

Now i'm really looking forward to my ECU talk arriving.

It sounds like your sensor isn't picking up the correct water temp.

If you have, for example, a 77 degree thermostat and it feels your temp at 60-65, it will start to close again to keep more water circulating in the block to bring the temps back up again.