Thread: 82° thermostat? who's doing this and has it worked out for the long run?

Still running a low temp inline top hose thermostat mate. 4.6 V8 D2. Still works well but in Winter the heater isn't what it was

How much heat are you talking about? What makes you think it's any hotter than your TD dual cab? Do you have a proper temp gauge, or is it a perception thing? If you've only had the car a few weeks, have you had the cooling system checked?
For example, my son's TD42 Patrol generates far greater underbonnet temps than my TD5 Disco.... or so it seems. An accurate temp reading might surprise you. Or, of course, you may be right and it is hot. if it is there is possibly something wrong with it.

Originally Posted by Tins

How much heat are you talking about? What makes you think it's any hotter than your TD dual cab? Do you have a proper temp gauge, or is it a perception thing? If you've only had the car a few weeks, have you had the cooling system checked?
For example, my son's TD42 Patrol generates far greater underbonnet temps than my TD5 Disco.... or so it seems. An accurate temp reading might surprise you. Or, of course, you may be right and it is hot. if it is there is possibly something wrong with it.

Because i could touch the panels and bonnet on my dual cab without being burned. The ute also didn't take an hour to cool down afterwards. Yes i know you couldn't get any more of a polar opposite than a cast iron turbo diesel to an ally petrol v8. But just seems odd to me. No i haven't had a chance to get the cooling system inspected yet.

I have an obd2 wireless scanner coming so i can get an accurate read on the temp before i do change anything.

Will be flushing the coolant anyways this r&r.

I might add that the car does have a mostly full service history and the temp gauge never goes above half and comes up to temp fairly quick. It is high milage though at 270,000kms.

Originally Posted by shayne86

I might add that the car does have a mostly full service history and the temp gauge never goes above half and comes up to temp fairly quick. It is high milage though at 270,000kms.

It won't take you long to work out that the factory gauge is a hopeless liar and is not to be trusted. It is an idiot light at best. Fit a proper one ASAP.

Originally Posted by Tins

It won't take you long to work out that the factory gauge is a hopeless liar and is not to be trusted. It is an idiot light at best. Fit a proper one ASAP.

Yeah i have read that a lot

Originally Posted by shayne86

.... and the temp gauge never goes above half and comes up to temp fairly quick. ....

This means zero!
The OBDII scanner thing will show you actual temps.

My V8('00 model) temp gauge really only shows anything above half way once coolant temp is in the 115°C (IIRC .. maybe more!) temp range.
Mine had a huge cooling problem, which I thought I solved(but turned out to be a major block shattering issue).
So my experience with seriously overheating V8's dash gauges OBDII dongles and freebie software was eye opening.

My understanding of modern vehicles tho is that most coolant temp gauges work similarly .. they just show the 'unaware' that everything is fine, and once the problem has already happened, only then will the gauge alert this 'unwary' driver that there is a problem.
My brother had the same issue in his '00 Patrol(petrol) where the gauge only showed the coolant getting hot, AFTER the steam was billowing out the bonnet.

To date, only car I can recall that has an actual temperature gauge that shows actual temps ... in the dash cluster .. is the Peugeot 307 HDi.
My dad has one, and he's forever complaining that it goes up and down, up and down, he seems to think that when it goes up, it's overheating!

I go through this repetitive routine, pretty much, every week with him(he's old .. maybe suffering memory loss).

I used to see actual temps in the brothers(now gone) Iveco Stralis too. Cruising .. would show whatever cool normal temp, hard up a long hill, it'd heat a bit(as you'd expect) .. and coolant temps would rise .. gauge would show you this, viscous fan would start to roar.

But just to reassure you .. your "never goes above half" gauge means coolant temp could be between about 60(-ish) and 115(-ish) °C

The D2 V8 runs too hot. The cooler thermostat is kinder to the block. Cheers