My current o2 sensor has been on for 80,000 miles so i am trying to
replace it.  Yesterday I put liquid wrench on it and wd-40.  It turned
about 1/10 and won't go past that point.  There is play, I can move
tighten and loosen it within that 1/10 turn, but how to get it past that
point?  I've been using a crescent wrench, but now I think I'll go get a
fixed-size wrench.  Someone suggested heating up the area with a small
torch.  There seems to be some promise since there is a little play.

Thanks,

Les
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