[cadillac512]

The trouble with thread sealers is that they are typically made to seal tapered threads (pipe threads). What is needed on a straight thread (like a stud going to water) is a sealer that "sets up" or "cures". I like to use a good brand of RTV silicone on the threads and lightly snug the studs into the block. The threads on studs and block must be scrupulously clean and bone dry when installing,and a few hours without water on the back sides to cure. They never leak,and come out easily next time.
Alternately, loctite blue (242) can be used as well. It will be a bit harder to remove next time but will seal well.



Terry