These probably weren't cross threaded from the factory. Generally, these come out like that due to the heat cycling. At the dealer, I would always heat the bung with a torch or inductive heater until red hot and sometimes even then (<10%), they would strip the threads on the way out. You've got to be sure to run a tap through the bung to clear out any rough spots before reinstalling in the oem pipe.
Both O2 sensors crossthreaded from factory
I was working on installing an atp downpipe and it was really the second worst thing I've ever done while working on a car took me 5 fucking hours to remove the stock downpipe. I digress neither of the two o2 sensors wanted to come loose and I eventually coaxed them by tightening a little the loosening more and on both the threads were badly damaged. My car only has 30k miles and the sensors have never been removed prior. Can I warranty the sensors with ford? Also I need two o2 sensors so if anyone has some let me know.
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