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Someone explain to me how the fan clutch works...

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Old 07-30-2008, 09:54 AM
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Default Someone explain to me how the fan clutch works...
I put it back on and start the car and the fan isn't really spinning. The belt is turning the wheel fine, but the fan is only occasionally grabbing and turning much slower or not at all. I take the car for a drive and come back and the fan is turning full speed. Is this normal operation? I thought I had broke it, but now it's turning again?
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Old 07-30-2008, 10:07 AM
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Dummy version....As the fan gets hot, the "clutch" grabs harder onto the belt drive.
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Old 07-30-2008, 11:06 AM
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there's a fluid inside the aluminum finned bit that gets thicker when heated=makes it spin faster
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Old 07-30-2008, 11:09 AM
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Ok, so it's normal for it not to spin when you first start the car?
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Old 07-30-2008, 11:13 AM
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Default well I think it should spin a little but you should be able to stop it with your hand . . .
check it after it's hot and it should be very difficult to turn while not running . .
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Old 07-30-2008, 12:16 PM
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Default I would never attempt to stop *any* clutch fan on a car with my HAND!
Ouch!!!

Even if it's "supposed" to stop.... Not worth risking it!!
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Old 07-30-2008, 12:47 PM
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He didn't say his hand. He said "your hand" pointing the advice towards sidespar!! : )
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Old 07-30-2008, 01:01 PM
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Default spin it with hand while car is not running. you should be able to feel some resistance
if it feels spinning freely w/o resistance, it's shot.
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