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It depends on the gasket you are talking about and in some situations the position of the blow (leak) in the gasket. A head gasket on a car for example seals the space between the cylinders. or the space between the cylinders and the oil ports or the space between the cooling system and the cylinders. Should any of these Blow you can end up with water or oil inside the cylinder head which can ruin your motor. or if gasses are able to move from one cylinder to the other it will lead in irregular operation and a loss of power. In any case if it is blown it will need replacing. heads must always be tightened down with a torque wrench to stop it from cracking or becoming distorted.

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Q: What happens if you have a blown gasket?
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