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Head Gaskets and Valve Covers
Grand Am SE
Late Model 1979-New Ford Mustangs

What happens if an head gasket is blown out?


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Answered 2006-12-27 15:23:26

There are several possibilities, but most common is that pressurized exhaust gas is vented into the coolant chamber around the engine. That causes the engine coolant to blow out through the vent and the engine will continuously overheat. Other possibilities are: coolant can blow into the crankcase, pressurized exhaust gas can blow between two adjacent cylinders, significantly reducing power and economy. Head gasket failure is almost always caused by engine overheating.

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