sealing · FF-0111

Why does the big-bore head gasket leak on this engine?

With the gasket laid on the block, Ed compares its small circulation hole with the much larger water hole in the head. He says the gasket leaks there, that another spot has only a few thousandths to seal on, and that the gasket should be around .125 smaller.

Expert

Ed Smith

Evidence

expert attributed

Component

head gasket, water holes, and cylinder head

Applicable scope

1940 24-stud Ford Flathead V8 bored .125 over with original heads and a big-bore head gasket