I'm trying to take off the manifold bolts on an old Chevy 350 (the ones that connect the manifold to the header). I got 4 out of the 6 bolts out, but 2 are extremely struck and rounded due to all the rust. I actually broke my 14mm socket trying to remove it with a breaker bar. Now, after trying so many times, the bolts are rounded so much that I can put a 13mm wrench on, and it too will slip sometimes.
So what do I do now? I can't drive the vehicle to a shop because of a bad exhaust leak, so I don't have many options other than to solve this problem myself. PB blaster seems to be ineffective (although I have been applying more everyday), since the threads are very deep and the bolts are rusted on extremely tight.
Would I have to cut off the bolt head, take the manifold off, then worry about the stud later? What would be the cheapest way to cut the head off? (I don't have grinders or power tools...unless those are the only ways)
Just wondering what you guys think is the next step for me. Space is limited around the bolts... thanks