Question about 1992 Chevrolet K1500

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Low coolant truck does not over heat,but it looses coolant, about a quart a week. checked for leaks cant find any. Also checked oil for traces of coolant/broken valve gasket but couldn't find any coolant, oil seems fine? any ideas?

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  • Roberta Smith
    Roberta Smith May 11, 2010

    what colour is the exhaust ?

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If you don't have all of the test equipment handy there are other choices. It is probably a steam leak that will only show up with a combination of heat and pressure. Get a peice of heavy twine or thin wire. Tie the fan so that the clutch cannot engage. This will allow the radiator to heat up much faster. After the engine has ran for a while check the pressure build up on the top radiator hose (check for tightness). Now your nose and eyes are your best diagnostic equipment. Be careful to not let your engine get overheated.

Posted on Feb 07, 2009

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Hi
No 1, replace the rad cap.
You also need to have the cooling system leak tested, for carbon monoxide ingress, the tester fluid will change color, indicating possible leaking head gasket.
The cooling system needs pressure testing, with a test pump.
This will normally show up a leak.
Check under carpets, for heater matrix leak.
Good Luck !

Don´t forget to give a fixYa rating Please !

John.

Posted on Feb 04, 2009

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