Well-
I tried pretty much everything to get the old O2 sensor out in order to replace it...(heating/penetrating oils/time/ breaker bars). Nothing has worked. Then, the last time I attempted to crank on it the O2 sensor finally broke free, but unfortunately left its threads in the crossover. Does this happen often to other folks? What has everyone done to fix this? Anything? I really don't have the coin to be purchasing a spec 1 exhaust right now......
1. Maybe put a torch to the bung and atempt to use an easy out?
2. Try purchasing a good crossover pipe with a good hole, then break other exhaust bolts getting it out?
3. Weld it closed, and have a new bung welded in ( which would require it to be out of the car )?
4. Try to get at it with a pick/chisel and hammer and break it out?
Help!