find out the pitch of the thread on the o2 censor, and buy a chase threader, simular to a tap, it will chase the threads and your o2 cesor will go back in like new.Dont be tempted to use a tap as it will recut the threads and you will be worse off. Good luck

 

My first two were stuck on good as well even with the special socket and a wrench. ended up using a monkey/pipe wrench with fresh teeth and wow did that work great. wouldn't use it on anything I've got to put back in. chewed the thing up something fierce.

 

The open ended wrench is good, I didn't have one. I committed myself to it and cut the wires leaving the O2 sensor and slipped my closed wrench over. Worked beautifully, but there was no turning back.
The driver side front was the hardest to align for me as well. I bundled up the wires with a zip tie so I could spin it without the "tail" getting caught in everthing around there. Eventually got it, good luck all

 

Actually the passenger front one can be pulled out with the right size 22m deep socket. S&K tool company makes the perfect one that comes right out. just cut the wire and zip it out. on the others you may need an oxygen sensor tap. its not cheap but the tool guys have them. usually happens when you have to heat up the old one to get it out, and the threads come with it. you just have to cut the new threads, takes some time but it does work.

 

nice and sunny out...gong out in about an hour with a buddy and will report back. id wondered what size exactly the thing was. closest i could get was 7/8 which was the size of O2 sensor socket i bought. When the sensor is really stuck in there I've found that the special socket slips up and off with a lot force from an under vehicle angle. I'll be giving the open ended wrench another try today. thanks for all the replies guys.

 

Summary:

DO NOT DO THIS AT NIGHT OUTSIDE IN THE COLD WITH NUMB FINGERS!!!. the reason it felt cross threaded is because....drum roll.......IT IS the sensor is chewed......well $70 mistake....us damn amateurs......all done save that one and have the new one on order. thanks for all your help guys and have a happy holiday.

 

use a pick, you might be able to salvage the threads, external threads are alot easier to fix sometimes then internal, or if its just the first few threads, you can probably just pull them off and start lower in the threads to plug it, it should still seal fine with even half of em missing haha

 

they are all crossed like a damn "T" I did a number on them. thanks thought Kodiak. I'll have to save that for the next time haha

 

haha no problem... my ideas come from years of experience breaking simple **** and having to come up with ways on fixing it before bitting the bullet and buying new stuff to break again hahah.

my favorite and most used tools: pb blaster, pipe cleaners, hammer, duct tape, dremmel, magnetic pickup tool and a big set of picks and chissels hahaha