Question about 2000 Buick Century

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My 2000 Buick Century keeps overheating. We've changed the thermostat and radiator. Any other suggestions

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I hope it's just the radiator cap... It should be a 14# (14 psi - 14 pounds of pressure) cap ... The valve in the cap may be broken/closed and create a high pressure in the colling system. High pressure means high temperature.
If so, you can temporarily "loosen" the cap and it will run cooler (no pressure). Of course, replace the cap.

The ignition timing could be at fault; perhaps just a leaky vacuum hose, but that would light up the "Check Engine Light".

It could also mean a blown head gasket. If the gasket gets worse, you will see white smoke and excess water drops out the tailpipe. The oil dipstick will have a milky substance on it (water and oil mixed), and the engine will start running noticeably rough ( not just slighhtly rough).

Hope this helps!



Posted on Sep 10, 2009

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If thermostat is new and you correctly filled radiator by filling while running and let level drop so all fluid goes into block and then fill up radiator again, then you either have faulty temp sensor or plugged exhaust.

Posted on Sep 10, 2009

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