Originally Posted by Spankdaddy
Ive got a sbc with hairline cracks in the lifter valley across each cylinder water jacket. These showed up when magnafluxed. They showed no signs of leakage when the motor was torn down. I hate to get rid of the block because it is out of my anniversary model corvette. Can this be repaired and how expensive is it?
This is pretty common, if you chased every crack in a casting you'd go nuts. If they're not leaking and you don't lean on the engine for lots of power all the time, just ignore them.