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#1
11-29-2006, 03:17 AM
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Fan Clutch??
hey guys.
Time for me to find another problem to fix on my 91 c1500 4.3L, automatic, no a/c What are the signs of a failed or failing fan clutch? Also, if it's bad can it cause any other damage to the engine or water pump area? How do I test the fan clutch to make sure it's not bad? I heard that they should spin free, but mine has a lot of tension on it, it moves just a bit when I try to spin it. (it moves both ways) Also, I know there are some specifics about making sure the I know the rear axle ratio (how do I find that info) to buy the correct part and also making sure it's a reverse rotation style (how is that determined) and the mounting distances from the clutch hub to water pump and fan blade to clutch distances..I did not think it would be this heady. thanks in advance. 
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#2
11-29-2006, 11:03 AM
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Re: Fan Clutch??
Usually a bad fan clutch will get noisy, the fan could freewheel. You could grab a fan blade and if the clutch is bad, the fan will wobble in the front/rear plane. A bad fan clutch can very well take out the water pump.
__________________
1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1! 2005 Crown Vic P71 - former AZ DPS - 4.6 liters of pure creamy slothness! 1967 El Camino L79/M20 old school asphalt raper Remember - a government that is strong enough to give you everything you need, is also strong enough to take everything you have.
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#3
11-30-2006, 12:24 AM
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Re: Fan Clutch??
after some research i answered my own question. A reverse direction fan clutch is one that has the water pump driven by the serp belt via the smooth side of the belt.
When warm there should be tension on the fan and little to no spin. When cold, it should spin no more than three turns at most..if that.
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#4
11-30-2006, 12:39 AM
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Re: Fan Clutch??
Quote:
__________________
If it ain't broke.......screw with it till it is.  Even at a Mensa convention,
Someone's the dumbest person in the room.
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#5
11-30-2006, 08:01 PM
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Re: Fan Clutch??
Quote:
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#6
12-02-2006, 12:18 PM
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Re: Fan Clutch??
yes youonly grab it with the engine not running lmao
it should have real good resistance, especially when its hot, if not then its toast, common issue with these and it will most lilely over heat, and that would be at low speeds and sitting idling, when the fan is most needed good luck
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