Hey guys my wifes WJ is starting to overheat on us. It only seems to do it when the AC is on and we are sitting still. She makes many deliveries a week and while making a delivery she usually lets the car run to keep it cool. She's only ever out of the car for 5 minutes max. I changed the Radiator cap and also made sure the fan is working (not sure if properly but it does run) Anything else I can check before going to the stealership. Would the T-Stat have anything to do with it. Twice now it has overheated and once was yesterday and it wasn't even that hot out..
Thanks for all inputs in advance
Overheating WJ
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If the thermostat is not opening the engine will over heat. You might remove the thermostat and through it in some boiling water to see if it opens up.
I imagine you checked your fluid level?
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Yeah I checked the fluids. When it overheats it actually overfills the overflow and then runs out the overflow tube. I don't know if that helps at all.
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Did you recently change the fluid or something? I'm wondering if you have an air bubble trapped in the system.
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you said that it got hot when you ran the a/c system. that jeep should have 2 fan systems. 1 is mechanical and the other is electric. the electric one comes on when you run the a/c system. check to see if that is coming on . if not then you might need to check a fan control relay or replace the whole fan. let me know if not. i will ask one of the jeep techs at my work and let you know for sure....
fred
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