Headbolt

[supereal]

The problem with "wet" head studs is often related to the use of a threading tap to clear the threads in the block, instead of a proper cleaning tap. Old cast iron is very fragile from years of hot/cold cycles, and the threads can be damaged. We use a good clearing tap to clean the block, and put sealer on the block end of the studs. New studs are a "must". As for Barr's Leaks, the "factory rebuilt" engines always included some, and seldom caused problems.