Question about 1995 Cadillac DeVille

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Overheating the coollent boils and is not leaking how can i fix this

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Sufficient coolant? Check the coolant reservoir first. Then, WITH THE ENGINE COOL, undo the radiator cap and check the coolant level in the radiator itself. Fill completely full as needed.

Any noises from the water pump? It may be failing, although a small leak is usually present and you say there's no leaks.

Remove the thermostat and check it by putting it in a pan of boiling water. Does it open like it should? If not, it needs to be replaced.

You CAN run an engine without a thermostat but it will warm up very slowly but that would be a good test to see of that stops the overheating.

Do you have a temp gauge in the dash? Or just a warning light? Do either indicate overheating. If they do, turn on the HEATER [not defroster] and see if the temp goes down or the light goes off. Your radiator may be partially clogged and the heater core will act as kind of a secondary radiator.

Posted on Feb 21, 2012

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