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 ...

How to repair a cracked engine block A cracked block is not necessarily the end of the engine. Ed’s diesel was saved by some careful stitchingu2028u2028 ...

Not to mention, a huge cast part is almost impossible to repair whereas the traditional folds of stamped metal can be fixed using traditional methods.