Hmmm, I don't believe mine is 1 inch, 13/16th is just too small and 7/8th is just too large, and that little bastard sure looks like it's welded on there, but I'll try and put a socket on it tonight. Thanks,
If you are dead set at getting it out, and are for sure replacing it, just cut the wire and use a std stocket (6 point, never use a 12 point on a 6 point hex). But honestly, few sensors are actually bad, a majority of them last a lifetime of the vehicle assuming it is kept in good tune and nothing poisons the sensor.
My 85 Cutlass I could use a box end wrench! It was in a great place, the socket was harder to use! Love that 1980 manifold off of a 260 Olds that I found. Who says 260's are worthless??!?!
Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
Re: O2 Sensor
Sometimes the sensor and area around it needs to be heated. Plumbing propane torches work well for this. If you get it to turn and then it locks up again wait for everything to cool and spray some WD-40 or similar into the gap where the threads are. Then screw it back IN. It should spin out after repeating this a few times. Beats tearing the threads out of the pipe.