Jeep XJ Cherokee overheating
I have a 2000 Jeep Cherokee (XJ) 4.0 with
156K miles. It enjoys overheating at stop
lights only. It is more likely to overheat with
the AC running, but it will eventually
overheat with the AC off if it idles without
airflow for too long. It has never overheated
while moving. One day, it got so hot that it
cracked the radiator which led to me
swapping every part in the system. So far,
Ive changed the radiator, upper and lower
hoses, thermostat (185°), thermostat
housing, waterpump, and fan clutch. Ann
new coolant and burped the system but its
still overheating. There is no oil in the
coolant, no coolant in the oil, and no blue or
white smoke coming from the exhaust
(pretty sure heads/gaskets are fine). So
what gives? Am I missing something.
Thermostat tests pass as well.
Flush cooling system with Prestone Radiator and Cooling System flush. Sounds like there is some blockage in the engines cooling system passages.
I'll give that a try. I've thought about the posibility of blocked engine cooling passages, but then dismissed the idea as the engine does/will cool when driving. Seems that an engine would never maintain a cool/normal temp without cooling passages.
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