quick cherokee question

[Dave Haggard]

Have a friend with a jeep cherokee - it keeps overheating - they have replaced the thermostat and the water pump and it didnt help - does this mean that the radiator is bad?

 

[J-Thompson]

Have a friend with a jeep cherokee - it keeps overheating - they have replaced the thermostat and the water pump and it didnt help - does this mean that the radiator is bad?

Radiator plugged with mud?
fan clutch good?
is the inside the radiator clean?
hoses good? (the inside can some time collapse ,do both hoses get hot)

 

[ptsb5a]

Is the rad cap holding pressure. If it doesn't allow the cooling system to pressurize the boiling point of the coolant will be much lower. If it boils then it cannot easily transfer heat from the motor to the coolant and then transfer heat from the coolant to the rad.

 

[tjkj2002]

Sounds like a air bubble still in the system,XJ's with the 4.0 are the worst trying to bleed the cooling system.

 

[LibertyTC]

x2 on air bubbles and new rad cap.Has this jeep ever been flushed properly?
Does this Cherokee have the heater core hoses coming out of the firewall?
Best way to flush it is with a reverse flush kit if possible.
Amazing how much crud is in the overall system, block/cores/overflow bottle after years of work.