I've searched here, and there, and over the web and everyone says to do the same things to remedy the overheating issues.... well I've done all of them and its still overheating. As the title states, my 2000 4.0 is still overheating after I've changed every part in the cooling system. It only overheats at idle (stop lights, drive thru lines, etc...). It WILL overheat with AC turned off but takes a while, but it overheats within 5-10 mins with AC on at idle. While driving/moving, it maintains 210* (with or without AC on).
It started overheating at the beginning of the summer. Since then, I've replaced/done:
Radiator
Upper Radiator Hose
Lower Radiator Hose
Thermostat (195*)
Thermostat Housing
Coolant Temp Sensor
Water Pump
Hood Vents
Fan Clutch (First replaced with XJ fan clutch, then tried ZJ fan clutch which is currently installed now)
Radiator Cap
Flushed coolant (twice)
Checked for head/gasket leaks by certified mechanic (no oil in coolant, no coolant in my oil, no exhaust in my coolant, no coolant leaking into my exhaust, bore scoped every cylinder for traces of coolant, checked compression, leak checked coolant system, etc...)
Checked electric fan, (comes on around 218*ish) -- best I can tell from the temp gauge.
Checked for cracks/leaks in the overflow bottle.... none found.
All checks are good. Jeep runs great. I'm at a loss. The ONLY thing I haven't changed is heater core and heater core hoses.
Someone please help. I'm willing to try anything (including changing the stupid heater core if someone mentions it). I'm really debating getting rid of my Jeep if I cant get this problem solved.
It started overheating at the beginning of the summer. Since then, I've replaced/done:
Radiator
Upper Radiator Hose
Lower Radiator Hose
Thermostat (195*)
Thermostat Housing
Coolant Temp Sensor
Water Pump
Hood Vents
Fan Clutch (First replaced with XJ fan clutch, then tried ZJ fan clutch which is currently installed now)
Radiator Cap
Flushed coolant (twice)
Checked for head/gasket leaks by certified mechanic (no oil in coolant, no coolant in my oil, no exhaust in my coolant, no coolant leaking into my exhaust, bore scoped every cylinder for traces of coolant, checked compression, leak checked coolant system, etc...)
Checked electric fan, (comes on around 218*ish) -- best I can tell from the temp gauge.
Checked for cracks/leaks in the overflow bottle.... none found.
All checks are good. Jeep runs great. I'm at a loss. The ONLY thing I haven't changed is heater core and heater core hoses.
Someone please help. I'm willing to try anything (including changing the stupid heater core if someone mentions it). I'm really debating getting rid of my Jeep if I cant get this problem solved.