318 exhaust manifold bolts and nuts....

firefighter1 said

I ran into a problem. One of the studs that I need to use in order to hang the exhaust manifolds is stripped. When I tried to take it off using vice grips, it seems to be frozen in there. I tried spraying some wrench off in there, but it did nothing. Ay suggestions? I don't want to brake the stud off in the head otherwise I think I'll be screwed!

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The two stud's on the end's of the head, are in the head with a stud w/a nut,
is because those are in the water passage's. The bolt size is 5/16x18 coarse thread, in all hole's. Just make sure you use some kind off good sealer, on the two end bolt's. Some on this site, say to use Permatex Copper RTV. As for trying to remove the stud, I would use some decent heat, but don't go overboard. I have also mig welded a nut on the stud to aid help in removing it. You may have to heat it more than once, just be careful to not destroy anything. Good luck.