Clutch fan

[churky89]

If I spin the fan by hand should there be some resistance in the fan....JEEPs been sitting for a few days....have been having mild overheating probs....

[djblade311]

should be some resistance but resistance increases when its hot. Spin by hand when cool and then spin it when its been ran at normal operating temp

[Blaine B.]

Shouldn't be much resistance. my old clutch was bad and there was too much resistance when cold and perhaps not enough when really hot.....easy to replace though, about a 30.00 cost for the clutch....do it anyway, when's the last time it was done?

[Amplus]

I noticed my fan was spinning right when started cold (0*C). Didn't seem right to me since I've read about this clutch before. Is my clutch fooked? Winter is coming and would be nice for that thing to not spin while motor is warming up.

[RichP]

Anectodal, fan should roar for about 20 seconds on startup then quiet down once the oil in it redistributes.

[PolishX]

mine keeps turning on and off , like immediatly after start up and just keeps cycling like that .

[5-90]

1) Fan should show some resistance when the clutch is hot. Idling the engine for 10 minutes or so with the hood shut, or heating it up with a hair dryer or heat gun for a couple minutes should serve to get some resistance.

2) Fan clutches seem to last about four years in the XJ - I just change the damn thing every four years and I'm done with it. Why wait?

3) The fan clutch will tend to spin when you first start it up, due to the fluid settling in the bottom of the clutch at rest. This lasts 20-30 seconds, and the fan clutch should slip until it heats up again (although, it never "fully couples" - even at what could best be termed lockup, there's about a 20% reduction in speed from the hub to the fan. Viscous coupling, y'know...)

4) The fan clutch never fully "uncouples" either - inertia will transfer spin from the hub to the clutch - and the fan probably spins at anywhere from 10-80% of the hub speed, depending upon temperature.

5-90