Question about 1998 Chevrolet Lumina

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Runs hot and over heats - 1998 Chevrolet Lumina

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The problem could be caused due to any of the following reasons You might need to look at all these things step by step , to go to the root of the problem
1. Check the thermostat for the problems.
2. Check the entire cooling system for any leaks( check pipes from the raditor )
3. While the car is idle , switch on thhe Ac and see if both the fans come on . After a while one fan should stop.
4. A clogged raditor may also cause the problme with overheating.
5. Last it could be a blown gasket.


Posted on Sep 06, 2010

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Check Fans, turn on a/c and see if the fan or fans come on while vehicle is running. If they come on then that is not your problem. Check temperature with infrared thermometer at thermostat housing and at lower radiator hose. If both readings are near the same temp possible Thermostat problem. Do a block test or compression test to make sure a blown head gasket does not exist or cracked cylinder head or engine block. The the hoses have pressure squeeze them should be firm at operating temperature. Is your coolant full. Does it boil back out of the reservoir if so possible thermostat or head gasket problem. If the coolant was changed recently system may need bled. May have partially plugged Radiator. Flush maybe.

Posted on Sep 06, 2010


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