Question about 1991 Jeep Wrangler

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My jeep is overheating on the freeway over 50 mph. but isnt around town or on the trail. i have changed the water pump thermastat fan cluch and coolant flush. the senser is working properly .please help

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Sounds like you have a heat transfer problem. First, on a 91, it's likely that the inside of your radiator is partially obstructed with calcium, rust or both. I know that you flushed it but often the flush will go around the obstruction and will only clean the parts that are already flowing (does little good). Rust does not dissolve easily using over the counter flushes and flushing in the vehicle often leaves debris in the tank which will get right back into the core as soon as you start the engine up again. sometimes it can be commercially cleaned, other times you need to just replace it. Air flow can also be impaired...check that the a/c condenser and the face of the radiator between it and the condenser are clean and not packed with bugs, leaves or other debris.

Posted on Oct 02, 2010

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