I don't get what the confusion is...OEM fan and OEM clutch to OEM fan pulley with OEM radiator and OEM AC compressor (stock set up) that's everything involved here... The fact that it is hitting or rubbing is the issue obviously especially since it is back to "stock"

 

Sounds like someone put a "rebuilt" water pump on it. The rebuilder presses the mounting flange onto the shaft. If he doesn't get it in the right position the clutch and fan mounts wrong. Rebuilt clutches have the same problem.
Measure the exposed shaft lengths, then compare with new ones.

KEY WORDS """"INSTANTLY OVERHEATS WHEN POINTING UPHILL.""'
An inadequate cooling system does not "OVERHEAT INSTANTLY"'"" then INSTANTLY cool off pointing downhill. Vehicle position makes no difference.
There's a leak somewhere sucking air in, causing the bubble.

A major cause of a leak - screw type clamps - factory uses constant tension clamps - they don't gather the hose to make a wrinkle.

 

^^^^^^^^^^^^^

It's hitting/rubbing because it's back to stock????????..........what????? They came from the factory/dealership hitting/rubbing???????? Don't think so. If it's hitting/rubbing, then it AIN'T back to stock.

 

I'd bet the pulley doesn't quite line up either.

Unless it's from the factory - it's "OEM TYPE."

The hose leak problem with screw type clamps -- sometimes if you loosen the clamp, twist the hose around so it's loose, then tighten the clamp as you keep twisting the hose to "normalize" the position and puckers, it will seal correctly. A touch of grease also helps.
We all hate the constant tension type clamps - a PITA and they often break, but they do a great job.

 

Ill ask him to check the water pump shaft, but I think I installed a new water pump a few months ago...ha ha I can't remember. anyways my point is I'm pretty sure it's not rebuilt. Ill still have him check. I was also thinking slow leak making air bubbles. I'll check all the clamps etc...

 

ok man seriously you're not adding anything supportive. You're just posting on here trying to make people sound dumb and ignorant when youre the one sounding dumb and ignorant....nowhere did I say it rubs BECAUSE it's stock. I said the issue is that its rubbing, especially because its back to stock meaning that since it's back to stock it SHOULDN'T be rubbing...Which would be an issue...shall I slow it down?

stop posting here. We've had enough ignorance and negativity and we AIN'T going to keep flogging a dead horse.

 

My interpretation was u were saying 180 degree opposites, no???? Sorry if I misinterpreted. Thought I had been trying to help since page 1 post 2 of this thread......guess not.

 

A new pump can have the flange pressed on in the wrong place too.
New - Autozone Chinese or new real OEM from a dealer? New doesn't mean it works.

I don't trust important things like pumps, sensors, suspension parts etc to cheapo parts stores.
You don't save money if you have to do it twice!

But maybe if I wanted a doggie doll with a wobbly head for the back window -- .


DJB can't be all bad - he likes dogs.

Posting just to post without valid information or experience is the same thing as spam. Little kids do that all the time.

 

*tiptoes in*

Not trying to be anything but a helper, or at the least a seeker of clarification, but isn't the stock clutch fan on an XJ mounted on it's own dedicated pulley? IIRC the XJ's water pump has it's own pulley, because mounting the mechanical fan on it would put it into the rad...

DJB - Could you take a few pictures of the fan and how it's interfering? Perhaps it's a simple case of the fan being too big. Again, I don't know all there is to these Jeeps, but didn't some years and some equipment packages have slightly different size fans? I could be wrong, but some folks have reported that their fan shrouds are anywhere from 16" to 17"... Of course, it could be a simple case of two folks measuring the same item from different points...

Is the A/C compressor original? Is the fan hitting the pulley? Also, when the fan 'hits' the compressor, is it a full-on solid 'whack!' or is it just kissing that sucker? I'm sorry if these questions have already been asked, or if I've gotten the pertinent facts wrong; I just woke up from a 28 hour insomnia binge, decided to peek on-line, and these questions popped into my head. (I blame Communists. Or aliens. We shall say nothing of Alien Commies... ) If the fan is just nicking the Compressor, perhaps it could be adjusted back a little bit. Perhaps the clutch pulley is wearing, and has 'walked' forward on the shaft a bit.

As for the incline/decline insta-heat...

Witchcraft.

You've been hexed.

Call a priest.

 

The fan, fan clutch, and pulley are all mounted on the flange pressed onto the pump's shaft. If the flange is even off by 1/4" it can make all kinds of clearance problems.

It's not a new problem, nor is it limited to Jeeps. I've had it happen on Fords, Chevy's - most everything.
For Chevys they even make short shaft pumps for hot rod clearance problems.

If it needs to be spaced out - forward a little - Jegs and other hi performance outfits have thin spacers to do it. It fits between the flange and the clutch back pushing it out a little. Easier than replacing the water pump.

Or you can make one easy enough. Avoid the temptation to use a stack of washers - they loosen up too fast. I've successfully used one thin washer a few times.

Pay attention to how the pulley lines up with the other pulleys - that's your critical measurement - even off by a little bit will cause the belt to flip off.

If everything else is original stock equipment, it has to be the pump flange creating the clearance issue.
No, there's no way to press the flange to the right position with it still on the pump. Yes, I've tried!

BTW - the better parts houses have the constant tension clamps - but you usually have to ask for them. They'll think you are nuts till you explain why!
Truck and tractor parts houses have what's called Barrel clamps, even better!

 

Guess our XJ is different......the only thing that bolts to the water pump is a pulley that the smooth side of the belt runs on. The rad fan bolts to the clutch and the clutch bolts to a idler pulley. The fan clutch assembly does not bolt to the water pump. Disregard the hose clamps.....those kind never work.