if you can move your clutch fan when the engine is warm,(and off. lol) your clutch fan needs replaced. but you should be able to move it when it's cold.

that's how a clutch fan works. there is fluid in there so when it warms up, it gets solid. but it needs to slip when the engine is still cold and warming up. when you rev it up, the fan slips so it doesn't keep your coolant cold when it should be warming up. theoretically, if i worded it right.

 

I think that's fairly accurate description in normal terms... I'm not a professional mechanic but worked on cars/trucks/Jeeps for a long time.
When cold (and off)... if you get anywhere near a full rotation or if you get very little resistance when attempting to rotate the fan, that could be sign of it failing.. it should rotate a little bit. For example... when I give mine a flick... I watch which blade I start with, and it might rotate a 1/4 of a rotation before it stops. So not very far at all with average pressure to turn it with. If you flick it and it just spins fairly freely w/little resistance and good rotation... it's time for a new one.

 

For an XJ with a 4.0 I came across this one day:


Despite me never having any problems mine spun for awhile after shut down when hot.
So I replaced it anyway.

 

Man, I just ordered parts from RockAuto, I'll check mine today.

 

I had hoped this guy knew what he was talking about.
But it was on the internet so it has to be correct. LOL.

 

Of course... if it's on the internet... it must be true... lol
but either way a mechanical fan on an XJ spinning for 14 seconds AFTER the engine has been shut off is nuts.