The Stovebolt Site Forums The Shop Area Engine Shop 45 Chev, 53 Chev cracked block

I have a little of the same concern as Carl, but it sure won't hurt to try and fix it. I doubt that the crank will drop out of the bottom of the engine. Cylinder wear might change a little, if there's misalignment, but older engines only had water jackets in the head, with the cylinder walls exposed to air. If the mechanical integrity of the block is compromised, the crack will likely open up and leak.