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Old 02-03-2013, 09:08 PM   #58
WDE46
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Join Date: Sep 2012
Location: Old Greg's Cavern
Posts: 9,389
My Ride: 2004 330Ci OBM
Quote:
Originally Posted by Bimmer_Addict View Post
Overheats at idle, any normal reader would read it if codes are stored and I have plastic housing thermostat
It's probably your fan.

Quote:
Originally Posted by lcoleman View Post
If it cools down while driving, you need a new fan clutch (if an auto).
That would be more likely a stuck open thermostat. The car should never get too cool. You can drive 90 mph in 10F weather on the interstate, your temp should be 93-95C. In other words too much air flow won't make the car run cool. Too much water flow makes it run cool.

Last edited by WDE46; 02-03-2013 at 09:09 PM.
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