Originally Posted by JmP6889928
Easy way to remove O2 sensor if you have a torch available. Heat the pipe red all around the sensor-not liquid red but just red and then hit it with cold water and quench it. It will come out very easily and won't damage the threads. If you use an impact, you could pull the threads out of the bung and then you're drilling, tapping, and helicoiling to repair it.
Just a torch to heat the metal helps. You don't have to get it red hot, and don't have to hit it with cold water. Just torch it a bit to heat it up, then wrench it off.