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Engine will possibly overheat, coolant will mix with the oil, and eventually destroy the engine. You must replace a cracked head gasket.

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Q: What happens if the head gasket is cracked?
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What happens if water went into exhaust pipe of truck?

blown head gasket or cracked block blown head gasket or cracked block


How do you repair a blown head gasket or cracked head?

A blown gasket can be repaired by replacing the gasket...if you are talking about the head gasket, then you have to remove the cylinder head from the engine block and replace the gasket that is inbetween them. Cracked heads generally have to be replaced because they are made of aluminum which cannot be repaired permanently once it is cracked.


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