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Old 05-10-2010, 12:25 AM
JohnM. JohnM. is offline
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Join Date: Dec 2007
Location: NorCal
Posts: 1,332
Quote:
Originally Posted by Ivanerrol View Post
Even at extreme ambient air temperatures the system should keep the engine temperature at or less than 110 degrees - not up in the red. This is why I suggest a coolant circulation problem.
His car was only barely touching the red after sitting, idling in traffic for a long time. No mention of overheating while driving. The aux fan also did not kick on at 105 as it should have. A very worn fan clutch will definitely affect the small amount of air the engine fan is able to produce at idle.

I know that just sitting in the drive through food lane, my car will shoot up to 100C within 5 minutes of idling. If it's anywhere above 80F ambient, it will hit 105C. Then the aux fans will kick in full force. But if I had a weak fan clutch, and no aux fans, I could see it hitting 115 easily.
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