87 Prelude runs too hot in heavy traffic

Discussion in 'Prelude' started by TallGuyCA, Sep 7, 2003.

  1. TallGuyCA

    TallGuyCA Guest


    I am new to this group and this question may have been asked before.

    My'87 prelude SI runs great but in heavy stop and go traffic the water
    temperature goes way up at 80% and then the fan engages and cools it down to
    50% levels. In normal driving it is stable at 30% of the gage.

    This has been happening for couple of years and I am wondering what could be
    wrong. In the past the hottest the engine got was at the 50%. My mechanic
    friend said that it is the fan switch. I had it replaced and the problem

    Is there a thermostat that needs to be replaced? Could it be a sensor
    somewhere else that is broken? I just replaced the vacuum next to the
    distributor and oxygen sensor during a smog check.

    The car has 190,000 miles on the odometer and I have been the sole owner of
    the car.

    Thanks for your help in advance.
    TallGuyCA, Sep 7, 2003
  2. TallGuyCA

    N.E.Ohio Bob Guest

    I hope you have replaced the water pump at least once, if not, the
    impeller may be worn. If the thermostat is original, try a new one
    (Honda). Be sure the radiator is clean, and all the fins are still
    strong. Proper antifreeze strength is important also. (50/50) bob
    N.E.Ohio Bob, Sep 7, 2003
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