Question about 1991 Jeep Cherokee Limited

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Overheating jeep cherokee 1991

My jeep cherokee1991 runs hot about 240and with ac on runs about 260. i have replaced waterpump, thermostat,head gasket,rad cap,fan clutch, radiator.stills run hot.i had a 5 speed in there but had it turned into a automatic.new trans,they replaced the wiring harness and the ecu could this have anything to do with it running hot.anybody have this problem please help.thanks danno

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Sounds like you have a airlock or air in the system. i had the same problem. there is two hoses that run along the value cover. undo the top one and plug it with a screw driver or something. then the other hose the one that runs to your water pump you need to install a T on it that you can attach a garden hose too. turn the hose on full blast. the water should come shooting on the engine where you disconnecting the hose. let the hose run for about 15mins or so. i jumped on the bumber a bit to shake the jeep. just to make sure all the air comes out. the point of this is that this is the highest point on the engine. so the water should force any air out. jeeps are bad for this any air in the system really messes things up. the transmission thing has nothing to do with this. good luck

Posted on Jun 06, 2009

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