Question about 1998 Chevrolet K1500

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My 1998 K2500 suburban overheats when you first start the vehicle and drive it will heat up to between 96 and 117 celcius after which it will drop to mid 80's and wont rise over 92 which is as it should be

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  • Allan Watson Nov 16, 2008

    Water pump was replaced 2 months ago, when they replaced water pump they flushed and replaced thermostats, which I found out last week that they fitted them the wrong way around so I fitted them the correct way and replaced coolant and coolant bottle cap. This is a pressure system and once it reaches that correct pressure it will drive all day and not go over 92 degrees. Hoses are under 1 yr old as is radiator as well

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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

Posted on Nov 16, 2008

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As we don't have major issues with engines running too cold in Au, you can do away with the thermostat. I don't remove them totally, you should always use a restricter plate(a thermostat with the valve part removed will do it) otherwise the water can circulate too fast and you actually lessen the cooling systems effectiveness. It is probable that the thermostat is faulty by the way it is behaving.

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