It heated fine til I worked on it. Just gotta work the air out I guess. Ran into the same issue with my S10.

 

 

Results, water pump. Thanks everyone for your help! Btw I just bought a '96 Cherokee so I'm going to be all over this forum

 

I'd put that pump in my "trophy pile" (with the pretzel connecting rod, the doughnut brake rotor, piston, cam & crank remnants ect...)

 

You're only allowed one 8 page 109 post overheating thread.LOL

 

Not bad for a first post, huh? At least you got to see a gnarly water pump

 

Unless I had just bought that XJ and doing bumper-2-bumper maintenance.......I would never have post that pump pic. That's no trophy in my book. How long has the gf had the XJ?

 

She's had it about five years. Yeah I should probably be embarrassed but the overheating wasn't a gradual thing. Besides who just pulls water pumps off for a routine check anyway?

 

No one pulls one off for a routine check......they pull it off/replace it when they want a reliable daily driver and don't know what kind of maintenance has been done on an 11 year old vehicle.

I realize raising the hood once a week won't allow an internal inspection of the water pump, but asking oneself how old this/that part is while the hood is up is always a good idea.

Time to get started on the '96.

 

not many people do, most pumps start leaking b4 this

 

Thanks fellas. I'm going to retire this thread now and get started on the '96. You've been a tremendous help.

 

I did wonder, crossed my mind, could an 01 with an 0331 head have a hairline crack that might let exhaust acidify the coolant? That pump does look a little "rare". Don't even know if exhaust IS acidic, just a thought.

I guess westikle, if you have a "TUPY" foundry mark inside, under the cap?, you have the revised head, and not the problematic 0331. (I guess one first sign of trouble there is gradual, mystery, coolant loss)

 

Wonder if the impeller blades were retrieved from the block? 4 of 5 were on this one.

 

What would the coolant look like if the water pump looked like it does?

 

Yea, had wondered about the same thing back in post 105

""Also a system with a pump like that, at one time must have been pretty ugly. Seems there is a chance the heater core might have ended up plugged up. ""

We all learned in that thread last fall that when the coolant is moving too fast it won't pick up heat!

Maybe someone read that, then removed the paddles to slow the coolant. Looks like the same guy worked on Djb's new jeep as well.