Asking for a bit of OT help please
What's making me nervous - and what's prompted me to solicit a few suggestions - is that the corners on the O2 sensor seem to be rounding off... (Just for the record, yes, I did check/confirm that I was using the correct socket, I suspect that part of the rounding started with a "slightly-too-large" open end wrench that I discarded when I realized what was happening.) I really, REALLY don't want to be reduced to grabbing it with a set of vise-grips set on 'kill'...
I'm going back out there now to give the O2 sensor a couple of fairly-light taps with a hammer to see if I can break some of the corrosion up, & allow the PB Blaster to wick into the threads a bit more deeply - but I'd sure appreciate getting any tips I could from anyone else who's fought the same issue...
Thanks in advance guys.
What's making me nervous - and what's prompted me to solicit a few suggestions - is that the corners on the O2 sensor seem to be rounding off... (Just for the record, yes, I did check/confirm that I was using the correct socket, I suspect that part of the rounding started with a "slightly-too-large" open end wrench that I discarded when I realized what was happening.) I really, REALLY don't want to be reduced to grabbing it with a set of vise-grips set on 'kill'...
I'm going back out there now to give the O2 sensor a couple of fairly-light taps with a hammer to see if I can break some of the corrosion up, & allow the PB Blaster to wick into the threads a bit more deeply - but I'd sure appreciate getting any tips I could from anyone else who's fought the same issue...
Thanks in advance guys.

Grab cooling spray or R134 or desk duster. Cool the sensor.
Tighten it with a 6 point wrench to loosen. Then loosen it out.
Grew up where salt was used . . .
Seriously NOT what I was hoping to hear - not least because I don't have a flame wrench... 
Are you suggesting to just heat that connection up?? If that's the case, I have a MAPP gas torch that would probably suffice...
Thanks for the reply Toddoky.
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Success was a combination of the "love taps" from the hammer, some extra time away from the project (thanks to a brief thunderstorm that convinced me to go inside for a little while) and the discovery of an extra-long breaker bar that I didn't recall having (part of the tools that I inherited from my dad). Once I got back to it, I gave it a go using the extra-long breaker bar, & was rewarded with the "CREAK" sound that everyone who's worked with rusted parts is familiar with.

Again, thanks for the tips guys, I'll write 'em down & keep them in my back pocket for the next time I need them!








