Thread: Who is running a PEL500110 thermostat in their D2

most peculiar! What is the old orig thermostat temp? It should be the same 1 would think. Installing the right way round? (Silly question I know) Cold be a dud batch maybe but not likely. Is the rest of the system in good order? like hoses, radiator etc? Maybe the bypass hose?

Cheers Scott

The old original thermostat should be an 88Deg thermostat, while the one I put in is a 82deg thermostat. It should be giving me cooler running temps.

It is the right way round. I cant guarantee everything else is in good order, but the point is with the original thermostat it runs at 95 while with the new stat which should run cooler it runs at 102.

I am getting my temp measurements from scanguage. Not sure which sensor scanguage gets the water temp from.

I was hoping there was someone else out there that had installed this same thermostat. I guess I will have to go back to the original.

So the scangauge will be using temp input from the motor temp sender as the standard gauge uses. If the original thermo is an 88 and the new is 82 with the standard running a lower temp there is probly nothing wrong with your cooling system. With that reasoning the new 1 has to be either not opening at its rated temp or is not opening properly. The latter is my bet otherwise the temp would be a lot higher. 7 degrees is a fair bit of difference. I have not looked at 1 but is there a way of testing in a pot of hot water? Sorrry I am not able to offer more idea

Cheers Scott

Did you sort this out walker? I am about to order a new thermostat and am not sure if I should get this one or the normal one.

I sorted it out by putting the original thermostat back in. I did get the first one replaced for free but the 2nd one was exactly the same. I can't explain it. Either it was a bad batch or this is not the right thermostat for the D2 V8

Bummer! Is there anyone else out there who has used this successfully? I am about to put in an order for a bunch of parts from Rimmer Bros.

I am still happy with the PEM101020 -With Hard Spring (Designed for a V8 and used as a stopgap with K4 engines) that i put in at least 6 months ago.
The only difference is the spring tension (I think).

Originally Posted by walker

I sorted it out by putting the original thermostat back in. I did get the first one replaced for free but the 2nd one was exactly the same. I can't explain it. Either it was a bad batch or this is not the right thermostat for the D2 V8

I've been looking at replacing my thermostat and looked at getting the 'cooler running' PEL500110 but it seems that due to the lighter bypass spring at higher engine revs it is causing too much water to actually bypass the rad. Causing higher running temps. If you are doing alot of low engine speed work then it may allow cooler running.

PEM101020 might be a better option as it is an 82°C stat, but with a heavy bypass spring so should be better at higher engine speeds/water flow rates

But as I don't like being a guinea pig I'm just going to replace mine with the original PEM10990, as preventative maintenance.

Kelvin.

PS Mine is a TD5, not a V8 but part numbers are still the same for both engines.

PPS I can not be 100% sure that what I have said is actually correct