My old beater '92 Ranger is so close to hitting the half-million-mile mark (currently at 490,000) that I owe it to the old girl to get the exhaust back to a tolerable noise level.
The y-pipe coming of the exhaust manifold is toast. And there was no way to remove the bolts holding this y-pipe to the manifold, they were there 19yrs in a northern climate with lots of road salt, tough winters, and never in a garage.
So I had to chisel, cut, and grind off the bolts (or studs?) holding that y-pipe onto the manifold. With 19yrs and countless heat/cool cycles- man, those things were TOUGH. So now I'm getting ready to take on the dreaded task of drilling out the remaining portions of the left in the maniolds so I can bolt on a new y-pipe.
My question- is there any way to 'soften' these incredibly tough bolts before attempting to drill them out? All I have is a MAP gas torch (and propane), but wondering if heating them until red color and then letting them cool will soften them up a bit?
Or any other advice for this undesirable job?