Originally Posted by
biggin
Thanks Mike, but I couldn't have explained myself properly. All three studs fell out of the under side of the manifold when up the bush. When replacing with new studs last night, I noticed the front one would not tighten as the thread in the manifold had stripped. I need to re-tap to a larger size, but don't want to go too big in case it weakens the body of the manifold, and not too small in case it strips again. I was thinking maybe 10mm. I not sure how much meat there is around the stud hole.