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What is a core plug used for?

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Answered 2010-09-30 11:44:07
plugnever heard of one maybe you mean freeze plug it pops out when it freezes so the block don't crack.

A core plug (freeze plug) is used to seal the holes around the block that were required to remove the casting sand when the block was made. The idea that the plugs will prevent a cracked block if the coolant freezes does not work.

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