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Old 08-17-2011, 01:28 PM   #9
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Join Date: Mar 2010
Location: KCMO
Posts: 1,696
My Ride: M35A2
I know on some thermostats, they have a "fail-safe" built in. Where when it reaches a certain temp, a peice within the thermostat melts and allows it to fully open. Once this occurs they will no longer close and must be replaced.

Does anybody know if our BMW thermostats are like that? I've replaced mine, but never looked at it that closely.
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