Quote:

Exhaust header studs.

Thank you all for reponses.

I have cleaned threads thoroughly, will tighten only to a few ft-lbs (strong hand tight) with the double nut and use the Permatex 300, wait 48 hours befor coolant refill, and hope for better seal.



You should change you title of your post then.

I think exhaust studs should be snugged in or even tightened with plenty of sealer, maybe a hi temp sealer?,IMO.

Head studs are a different story...