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Old 01-28-2013, 07:38 PM
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ZeGerman ZeGerman is online now
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 17,717
Mein Auto: 1998 BMW 328is
You really do not want to wait to fix this. By running your engine with a failed t-stat, it the engine takes far longer to reach operating temp, and struggles to stay there (if it ever gets there at all in Illinois in the winter). This causes it to run rich for a long time, which is not only bad for the environment (and your pocketbook - due to poor fuel economy), but is hard on the engine, oxygen sensors, and catalytic converters. I'd fix it.
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1998 BMW 328is Shooting Brake
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
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