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Old 02-01-2013, 11:35 AM
jdauria jdauria is offline
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Location: Arlington, VA / NY
Join Date: Oct 2012
Posts: 721
Mein Auto: E39 ///M5
Originally Posted by jtwrights View Post
Coolant level is fine and I may have been unclear with the ambient temperature: it's been around 20 degrees F and when it goes below that temperature is when I'm having the problem.

And to reiterate, the engine is over cooling, NOT over heating; at least according to the temperature gauge in my car. My gut says thermostat but I just don't know enough to be sure.

Any ideas on cost to replace a thermostat? Is this a DIY project for a fairly handy (but generally car ignorant) person?
Thanks for clarification, just sounds like the thermostat is stuck open.

But I feel like if your going to replace that part, you might as well do the entire cooling system because once one starts to fail the others will inevitably follow
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