[Schurkey]

Originally Posted by F ROCK

x2 on the KW. I used the version in the can.. Follow instructions to a T.
Works real well.

Beware cans that have been "on the shelf" too long. All the fiberous stuff ends up as a lump in the bottom of the can.

Might want to dump the contents of the can--including the lump at the bottom--in a yard-sale blender to chew-up the "lump".

I used KW to seal-up a welding pinhole in my Olds 455 heads. Had a urine-stream leak from a previous repair.

Took over an hour of running to fully-seal that leak, not the "20 minutes" like it said on the can of KW. However, it's been sealed for a decade.

When you drain out the sealer and water after the block has quit leaking, be sure to remove the block drains as well as the radiator drain, so you remove as much as possible of the sealant.

Originally Posted by STEELCITYFIREBIRD

the question that would always be in my mind is are their any other cracks that were missed.

Yup.