02-08-2017, 04:05 PM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,527
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Not Ranked
You should notice a big difference in how long the fan spins when you shut the engine off while still cold - and shut it down when it's good and warm. I don't remember the old rule of thumb exactly but it's something like the fan should stop within 1 to 2 revolutions of the engine stopping when hot. When cold it might spin for several seconds.
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