 Cooling flaps, Is this thermostat good |
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| Ron914 |
 Mar 17 2026, 03:40 PM
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Member  Group: Members Posts: 488 Joined: 19-April 22 From: Huntington Beach,Ca Member No.: 26,487 Region Association: Southern California 
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In searching for reasons my car seems to be running too hot of oil temperature I investigated the thermostat /flap system . @Superhawk996 @emerygt350
The thermostat seems good so I will connect it up to the flaps and test . I have a question about the return spring on the flaps , it seems to take a fair amount of force to push it down(closing flaps) than I would expect . Does this seem normal ? I am concerned this amount of force will expand the thermostat before I get it hot . I pulled the thermostat and tested it with a heat gun , relaxed or cold it measured 38.29mm and after heating it expanded to 48.73mm    |
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| SirAndy |
Mar 17 2026, 07:42 PM
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Resident German Group: Admin Posts: 42,462 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
I doubt the thermostat is your problem. They're supposed to fail in the full cooling position and only pull the flaps if they're working.
If you disconnect the thermostat wire, the flaps will go to the "full cooling" position. Then continue your trouble shooting. (IMG:style_emoticons/default/popcorn[1].gif) |
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Posts in this topic
Ron914 Cooling flaps Mar 17 2026, 03:40 PM
L-Jet914 Here is the spec the thermostat bellows should be ... Mar 17 2026, 06:35 PM Superhawk996 Honestly I would leave the thermostat out of the m... Mar 17 2026, 07:28 PM
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