1998 Chevrolet K1500 Logo

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Allan Watson
Allan Watson Posted on Nov 16, 2008
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Overheating on initial running of engine

When I first start my car and drive it will heat up to anywhere between 96 and 117 celcius after which it drops down to mid 80's and doesnt rise over 92 as it should, even on a 2 hour run. But I do not understand why the overheating at the beginning. Has had a new radiator 12 months ago, a new water pump 1 month ago and found that the thermostats were fitted the wrong way around and washed out the coolant bottle replaced the lid and fitted the thermostats in the correct way but still have the same problem. This vehicle has 2 thermostats next to each other.

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ccdhair

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  • Posted on Nov 16, 2008
ccdhair
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Replace thermostats.

  • ccdhair Nov 18, 2008

    I believe your thermostat is upside down and sticking. Ok, do this...drill a very small hole in the new thermostat so the coolant always has some circulation. This should solve your issues.

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milespeed

  • 599 Answers
  • Posted on Nov 16, 2008

SOURCE: my 1998 K2500 suburban overheats

sounds almost normal..albeit a lazy thermostat likely....when did you last flush and fill the radiator and replace the thermostat?...fan clutch and associated belts and hoses should be inspected at this time also

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The car steming is high which causes over heating

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