Reply to "CMC Speedster running hot follow up"

Gordon NicholsMassachusetts 1993 CMC Supporting Member

Alternator pulley size: The pulley size affects how fast the fan spins versus engine RPM. YOUR pulley should be about 4-1/4" across the middle, lip to lip. Larger than that, the fan spins slower. Smaller than that, the fan spins faster.

While you're checking that, you should also check the diameter of the crankshaft pulley, as they are related. Mine is 6-3/4" to 6-7/8" lip-to-lip (it's dark down in there).

Your two should be similar or at least a similar ratio.

8/18/2111:41 AM

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