Thread: Who is running a PEL500110 thermostat in their D2

Is it running a bit cool for engine wear? Some say close to 100 c to get rid of moisture in the oil out and there are other considerations such as the proper operating temp for oil to best protect. I have considered a cooler set up but I would be surprised if a 4.6 is with its thicker walls is stressed at 84-87 typical water temps.

Cheers

it's one of those things that will never be proven. There is so much variation in build quality, that it's effectively "the luck of the draw".
Having read everything I can find on the subject, I'm trying to avoid being one of the ~80% with cracked blocks/slipped liners. The engine was not design in 1950/60 to run at 90-100C. LR weakened it by boring it out, weakened the mixture and increased the temps purely to reduce certain emissions at certain revs. After this cracked blocks/slipped lines was of epidemic proportions on both 4.0 and 4.6 engines.
There are "expert" opinions, that even though the 4.6 blocks were chosen for their slightly thicker walls, (assuming the guy checked the entire wall thickness on all 8 cylinders correctly on 1000's of blocks per week), that with the extra torque, they stay at a lower rev range under load, where the mixture is it's weakest, hence combustion temps are higher, contributing to the failure.


Anyway, it's all down to the individual, what they want to do and how lucky they feel.

Yep who would know. My 82 degree thermostat copped a work out today. 38 degrees outside and 67 degree intake temp. I gave it a hard time then idled it for a while and allowed temp to top out at 94. Later on heavy traffic at 39 degrees outside the coolant reached 95. AC going flat out at all times.

I reckon these temps are still sound. With the 4.0 running a stock stat it was 104-105 in the same conditions.

Cheers

I must have a high temp thermostat. My temps are between a lowest of 90c and mostly runs at 93-95c. Does go up to 102 quite often in hot weather and then drops back. Gets as high as 110c when idling sometimes in the heat.

So I think I will be doing D2Lee's mod and try to get the temps to a max of 90c by experimenting with different Tridon thermostats.

Cheers

Does the intake temp vary greatly?

So today when running up and down hills in 31 degree heat she sat on 84-87. That is my normal range when in the move around the burbs in the early 30 degree days. I reckon that is spot on temp for these engines. Given that Dexcool still does its job without boiling to at least 120.degrees the odd spike up to 94/95 idling with AC on on a really hot day close to 40 degrees is harmless in my view.

Cheers

I changed mine over to the PEL500110 on D2 v8 temperature range was originally around 95-99C, after swap it's 92-96.

Before that I swapped the original for standard, it went upto 98-102.
so then I went for the lower temp item. still thought it would have gone lower, as I can see some of the others are getting lower temps on this therm.

So there is variation in them for sure.

very happy with mine (yes I said it,,)
car telling me 40 outside Torque telling me 88deg at 100kph,
idleing for 6-7 minutes (left car on and aircon on for passenger Guiness) and it showed 90, 30secs later back to 88.

add late 30's and ocean humidity and its a good day to be at the Alex Surf Club!!!