Question about 2003 Jeep Wrangler

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Engine overheating at high rpms

My 2003 Jeep Wrangler (6 cylinder) overheats at at highway speeds. I've replace the fan clutch, the water pump, the serpentine belt, the thermostat, and most of the hoses. I've flushed the system and back flushed the system. Still, it overheats. My radiator doesn't leak.

I'm at a loss.

Posted by on

  • Richard Scordino May 11, 2010

    Did you remove the radiator when flushing? What did you use to flush? (there is a point coming but I need this info first)

  • Dar
    Dar May 11, 2010

    Does it actually overheat, or is the gauge telling you it is?

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  • Jeep Master
  • 412 Answers

Check the casting on your replacement water pump..4.0l engines require a reverse rotating water pump..may be causing your problem.

Posted on May 16, 2009

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Posted on Jan 02, 2017

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