I have an 03 TJ 4.0L engine. on the trail sometimes even in traffic when i have the AC on the my temp starts to go up. it does not do this without the AC on. any ideas on where to start at? usually i just kill the AC and temp goes back to 210. but i live in hawaii and i like to wheel with the AC on :)
TJ overheating with AC on
Dec 30, 2005
4 Replies
kodiakid did pass the time by typing:
I would suspect your radiator passages might be blocked or do you have a large winch or lights blocking flow? Could also be a fan clutch failing
i do have a winch on the front but it did this before the winch went on.
kodiakid did pass the time by typing:
Next up, check the fan clutch.
To check a viscous fan, turn off the engine after it has reached operating temperature and rotate the fan manually, and you should feel resistance. If it spins freely then the clutch is dead and needs to be replaced.
Another possibility is a sticking thermostat but usually that causes overheat all the time.
Also, check your coolant condition. Coasty
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