Quote:
Originally Posted by Assimilator1
Agreed with silicone lube for rubber seals, you shouldn't use mineral grease for them as it could cause them to swell.
Looks like I've got to change the T/stat on my M3 too, on a recent trip on mostly motorways and with a newly installed display gauge, it was showing coolant temp was only getting to ~60C! (ambient was ~5C). Oil temp wasn't quite getting to the ctr mark.
I'm getting the 2AF9 coolant temp code too.
I assume the 4 O-rings are for the 4 pipes connecting to the t/stat housing?
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From the OP's picture (red circled area), the four o-rings are all at the back of the housing. Those two rings pop out of the housing and there is an o-ring at each end (only two visible in the picture).