Hello there. Im new to the site and bin looking around quite a bit and im very impressed with the info on here.
Im am having a hell of a time getting the o2 sensor out of the cat pipe on my 99 gran prix GT. it is stuck and when i mean stuck I mean I broke my o2 sensor socket and then busted a pipe wrench in half trying to get it out after my regular deep well rounded it off. Im running out of sensor to work with. AND PATIENCE! Any Ideas? Im thinking of drilling a new hole and welding a nut onto the pipe and just installing the new one next to the original one. how much of the bottom of the sensor needs to be exposed to exhaust fumes? Thanks for any help you all might be able to give.