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Take the radiator cap off. Start the engine and watch for bubbles. This is a quick check. If you want a better check use a compression tester. Check all of the cylinders. They should all be similiar. If one or two are low you probably have a blown gasket. There are other causes for low compression, but they will all require opening the engine to fix. ANSWER Is your coolant temp gauge reading different readings like hi then low and back? Is there any white smoke coming from the exhaust? Is your engine running rough like 1 cylinder is missing?

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You can also borrow a tester at Autozone to test for blown head gasket. I believe it tests for exhaust gases in your coolant.

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โˆ™ 2007-12-12 14:08:35
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Q: How do you know if the head gaskets are blown in a 1997 Tahoe?
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