I wonder if anyone can help, at the weekend I went to fit a tubular manifold to my glanza, when I was undoing the manifold nuts to the cylinder head, I noticed the stud closest to the gearbox was just attached to a piece of the head what was broken off, it is not leaking oil or anything, just the exhaust is blowing there. Has anyone had this before and can this be welded? Any help will be much appreciated