Frozen rusted bolts... removal

I am in Pa. trailer it here my son will get them out. Or take it to a weld shop near you familiar with this process. He takes them out with his fingers once free even if broken flush. Tig welding them and then blowing cold air on the stud or bolt loosens them right up. He usually tig welds nuts on them.

I always would drill and extract them until he showed me this method. I can't tell you how many he does every week. Every head that comes here usually needs a couple taken out. He can get in the tightest places where you can get a drill in. Don't use a torch if the head is on the motor. and we never heat aluminum to remove a stud or bolt.

You don't want to heat the head to expand the head. You want to heat the bolt then shrink it. Remember some studs go into the water jacket . Ruin the threads and good luck sealing the new stud. Our zip is 18038.