E46Fanatics - View Single Post - Confession. I never changed the water pump and thermostat.
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Old 09-05-2017, 08:22 PM   #22
Registered User
Join Date: Mar 2014
Location: MN
Posts: 172
My Ride: 2005 325xi
Depending on where you live, I suggest applying WDE46's RTV fix to your new thermostat before installing it.

Read WDE46's link here: https://forum.e46fanatics.com/showthr...hermostat+leak

I'm in Minnesota, and whether I just had a run of not-so-good Wahler T-stats, or perhaps the cold weather going to hot, I cannot say. I replaced my already replaced-by-me Wahler T-stat two times in less than one year because of small, but noticeable leaks at the thermistor sensor. When the third one sprang the leak I was motivated enough to read all the threads and saw WDE46's. My newest T-stat has now been in about 3500 miles and is bone dry with no dried coolant residues. I saved the last T-stat that leaked, since I now know how to make it right.

Thanks, WDE46 !


Last edited by Mariner05; 09-05-2017 at 08:23 PM.
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