You could try heating up the head and tapping it with a hammer to break it loose. Be prepared for it to break off and you will have to drill it out and probably put a thread insert into the block to repair the threads. This is not for the faint of heart as it is difficult to drill out a steel bolt in an aluminum block. You must stay centered in the bolt and not drift off into the softer aluminum. I have seen people drill and tap the bolt head and put a bolt into that to remove the bolt with a damaged head. In this case I don't think that is a good approach but welding a nut onto it may work. David Teitelbaum vin 10757 --- In dmcnews@xxxx, rorx2000@xxxx wrote: > Hello, everyone I need some ideas on how to fix this if possiable. > I wanted to change the o-rings on the coolant Y-pipe under the intake > manifold. One nut broke and the other's head is stripped really bad. > I can't get a socket or vise grips on it. anyone have any ideas that > may help. > > > Rory > Vin#3010