how does this happen

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[SIZE=1]This may sound stupid but I want to know what causes a head to get a crackin it .

posted by  archangle

Any condition which causes the cas oron or aluminum to exceed its stress limits will cause the head to crack or warp.

Improper bolt tightening procedures, severe overheating the car engine, inadequate coolant flow to one part of the head. Very rarely a manufacturing defect such as a porous casting or a crack formed during the casting /cooling process may happen but the manufacturer's QA programs limit this problem

posted by  tbaxleyjr

thanks for your help

posted by  archangle

..........

posted by  Wally

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