We show you how to do your own engine block repair on our own cracked 351 Cleveland, with help from Josh Sprinkle of Miller Electric.

A machinist fixes a massive crack in an old cast iron engine block with a drill, a handful of bolts, and a tube of red loc-tite.

By the time you notice a severe engine block crack, it will usually require a full replacement. Here are the signs and symptoms to look out for beforehand.