Well, I've had some experience with this. First off, DO NOT try to pull it out with a screw extractor. I had a head break off of one of my y-pipe bolts this spring. I knew it wasn't seiezed in the engine block, (it was siezed on the y-pipe) so I yanked the y-pipe off and proceeded to drill into the bolt. I then put a screw extractor in there thinking it would simply screw out with this, I was dead wrong. The remains of the bolt didn't want to turn this time, and broke the screw extractor inside of it. Since this was made of HARDENDED steel, it took me TWO MONTHS to eventually drill, grind, swear, whatnot all the way through it. Once I finally got it out, I just decided to re-tap the hole with the next larger thread size. I was in a rush though. You may want to try a heli-coil or a thread restorer kit (never used either one though). In any case, you are going to need to drill out the bolts in the engine block. Good luck. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960 --- 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