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      10-06-2022, 11:57 AM   #12
Helmsman
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Drives: 2011 AW E90 M3 ZCP
Join Date: Mar 2014
Location: Stockholm, Sweden

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Quote:
Originally Posted by LOWCAM View Post
that TSTAT spec helped me a lot!
I looked around more at the forum and I found that normal condition should get around 76C~82C all the time

I've seen lowest temp around 64~68 when driving
it never go up 76~78 while moving
70~74 was average when driving
and it goes straight up to 88~90 when standing still!
I think my TSTAT is stuck at half way open

would that be normal too?
I'll keep post what's going on!
Yep sounds like it may be busted. My acted in a similar way, took ages before it eventually came over 70-75C after been around 65C or so for too long. That changed right away with a new Tstat, goes yp to 78C quite swiftly (well still takes a good 10-15min but gets there). Well worth replacing it, fairly straight forward to DIY and give you some further insight in possible coolant leak.
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