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biffa75 · 7th May 2021, 00:19

Hi shuriken,

I also fitted a new thermostat in November last year (also from dmgrs).
I also found my thermostat to be operating around 80-82°c when driving and in stop start traffic to be around 85°c.

It should be the 90°c area.

Mine has been like this now for over 2,000 miles. I personally see it as a problem, but it can wait a little while before I spend that amount of money in the hope the part works as intended. To my knowledge it may just use slightly more fuel due to the cooler running temperature.(I'm also probably kidding myself here, but if it's running cooler, it's going to take a lot more for it to overheat).

As towards the leak, you say you have checked the serrated clips are pushed as far to the ends of that straight pipe as possible. Other than ensuring the mating faces on the block are perfectly clean. I could only assume it is a fault with the thermostat? Or a hose.

It could be a faulty thermostat, seeing how it opens too early, as does mine. It's possible there could be an hairline fracture in the plastic housing.

7th May 2021, 00:19	#7
biffa75 Trader Mk1 2004 tourer cdti + MK1 2003 Saloon CDT Join Date: Nov 2015 Location: west yorkshire Posts: 495 Thanks: 106 Thanked 91 Times in 57 Posts	Hi shuriken, I also fitted a new thermostat in November last year (also from dmgrs). I also found my thermostat to be operating around 80-82°c when driving and in stop start traffic to be around 85°c. It should be the 90°c area. Mine has been like this now for over 2,000 miles. I personally see it as a problem, but it can wait a little while before I spend that amount of money in the hope the part works as intended. To my knowledge it may just use slightly more fuel due to the cooler running temperature.(I'm also probably kidding myself here, but if it's running cooler, it's going to take a lot more for it to overheat). As towards the leak, you say you have checked the serrated clips are pushed as far to the ends of that straight pipe as possible. Other than ensuring the mating faces on the block are perfectly clean. I could only assume it is a fault with the thermostat? Or a hose. It could be a faulty thermostat, seeing how it opens too early, as does mine. It's possible there could be an hairline fracture in the plastic housing. Last edited by biffa75; 7th May 2021 at 00:22..