Then you are facing bigger troubles soon. We don't even have an
electric fan in ours, just the clutch fan and it takes 4 hours of heavy
low range off roading in plus 100 deg temps to make our red light come
on.

And at the age of the OP's Jeep, the clutch on the fan is sure suspect.

To test it, he can heat up the engine and have someone shut it down
while he watches the fan. If the fan keeps on spinning hot, it is
dead. When hot it should stop almost instantly.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Paw wrote:
>
> Just to chime in - this is what was wrong last time when mine started to
> overhear - electric fan was shot and wasn't kicking in...
>
> Paul
>
> "Drifter" > wrote in message
> ...
> > On Tue, 3 May 2005 21:44:50 -0400, "dcollivier"
> > > wrote:
> >
> >>90 Cherokee 4.0L back on road after winter, it now overheats. I changed
> >>the thermostat and refilled. Still overheats. I thought that maybe it
> >>could be an air lock or something, but after playing with the system I
> >>can't
> >>seem to get it any better. I tried burping the system by cracking the
> >>hoses
> >>open one at a time and allowing some air out but it did not seem to help.
> >>It does not seem like there is any flow in the upper hose at all, but
> >>there
> >>is coolant in it. Any other check for a waterpump before I throw parts at
> >>it. There is no leaking fluid anywhere in the system, the shaft on the
> >>pump
> >>also feels fine. Any help would be appreciated. Dave.
> >
> > Do you have a 2'nd electric fan? Is it kicking on at all?
> > also did you check for actual flow of fluid? I have seen an old water
> > pump that looked fine from the outside but the vanes were pretty much
> > corroded right down to stumps and it really wasn't moving any water.
> >
> >
> > Drifter
> > "I've been here, I've been there..."