Coolant leak from manifold studs

[Robert Foreman]

Set every block stud in place with Loctite, then they won't leak. Plus you can remove them easily if need be.

[FrogPond]

This. Thread Sealant. Just seals them, doesn't lock them. Mike

[John Cornforth]

Hi

I had leaking manifold studs. Permatex thread sealer used. They no longer leak.

[iandecjak]

Have now removed the manifold and studs which were all replaced during recent rebuild. No real issues other than one stud came out along with the helicoil and one had a chewed thread for some reason.
So new studs, helicoil kit and Permatex (thread sealer I already had not high temperature) on order!
Will update once all fitted.................