Maybe some blockage in the heater core preventing circulation?
Maybe... I'll try to flush just the heater core and see what happens.
Maybe some blockage in the heater core preventing circulation?
^^^^^^^What he said.. Worked on the Captains(Aaron) jeep. He went with the HEAVY duty rad on his from the dealer.Now we are changing back to the STOCK fan Set up and dropping the 3 Fan crap. He hasn't over heated on the road, but the 3 fans don't work in heavy loads as soft sand or long hill climbs on a 110 day out here.
GO all stock, your old rad could have needed to be serviced by a pro. The over the counter stuff to me is junk.
I was looking at some fan clutch problems earlier, seems to match your symptoms as well. I see you replaced it twice but you can do a simple test. Just get the car warmed up a little (not hot) then start it and see if you can stop the fan with a piece of rolled up newspaper. Then when engine is hot and coolant is boiling try the same test. Should be able to stop it when warm but not when hot.
Does that have plastic end-caps on it? I think a lot of people transition away from that to an all-metal radiator.
rockauto added mopar to their catalog a while back, should be cheaper than from the dealer
rockauto added mopar to their catalog a while back, should be cheaper than from the dealer
x2, That's where I got mine from.
This one is our new favorite in the Jeepspeed -
http://www.summitracing.com/parts/sum-382012/overview/year/1999/make/jeep/model/cherokee
It has two 3/4" tubes and overall core of 1.5". It cools better than anything else we have used, including the $500 custom aluminum units.
Just throwing that out as an option.