what size is the head stud threads etc for 24 stud v8 merc

[Richard Farrant]

Originally Posted by Lynn Eades

Before you helicoil your block, do some research on sealing the studs. I have read that it is a problem area in flathead v8s.
There is a guy in a Ford V8 forum that goes by the name of "rumbleseat". He has posted widely and is very knowledgeable.

Use one of the liquid PTFE pipe sealants, that will do the trick. Loctite one is good, been using it for years.