I have a 93 4.0 jeep cherokee that is starting to overheat again now that the cold weather is moving away. This has been a constant problem for years now. I have changed the water pump, radiator, fan clutch, electric fan, and thermostat. All in attempts to stop the overheating. It is holding radiator fluid still and has through the winter. All my fluid levels are good. Any time i leave the truck running without moving for over 10 minutes it starts to overheat. electric fan works and comes on with the a.c. Any ideas?

~Dustin

 

Does the gauge go into the red or what? Did you ever burp all of the air out of the cooling system...if you made all of those changes without burping, you may have some major air pocket issues.

 

does the electric fan come on with the ac off,is the clutch fan any good,

 

Verify operation of both fans (including the wiring and control electronics like relays) and also did you replace the radiator cap? $5.00 new.

 

Our chereokee's do get a little warm. What temp. is your xj getting up too.

 

x2 on the radiator cap

 

it holds a little under 210 normally. if i am sitting for a min or if i'm driving a lot or if its hot outside it will sit at 210. Then if i turn the engine off is when it realy gets hot. i can turn the engine off and then turn the key back on and it will get near the red. I don't think the electric fan is coming on without the ac on. I need to check that relay. The radiator and cap are new. Thank you all for your replies