There are plenty of instances where perfectly good—and often rare—cast iron cylinder head and engine block castings are scrapped due to the presence of a hairline crack in an external surface. Often ...

A cylinder head, especially an aluminum one, seldom fails on its own. Typically, there's another matter to contend with. Undoubtedly, the most frequent cause of cylinder-head cracking is an overheated ...

Add Yahoo as a preferred source to see more of our stories on Google. Cylinder heads get a lot of credit when it comes to engine power. Here at Jalopnik, we've touted the Chevy double hump heads' ...