[ghford]

Now I'm in real trouble. Installing a new manifold gasket, I turned one of the brass nuts to remove and the stud twisted off about an eighth inch inside the block. Never a good thing but I thought I could center punch, drill and extract it. I had no luck with punching and good quality sharp new hard bits bounce off like a rubber ball. I had no idea just how hard a manifold stud could be. I wonder about trying some type of cone shaped tip of stone or steel on a high speed hand motor tool. A guy has a video out there where he welds a shaft on hitting it repeatedly to build up weld. I asked my welder who is very good and highly experienced and he doesn't want to touch it fearing block damage especially with the few threads at the start exposed. Any ideas?

Many thanks,

Greg