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Re: 98 lumina oxygen sensor post cat removal
You can spray penetrant, like PB Blaster to the threads, several times on a cold exhaust.....give it some time, like an hour.....then start car and get to normal operating temp......shut off.....use a flex head breaker bar(with pipe if necessary) on an O2 sensor socket......work it back and forth....
Should come out.....but it may damage the threads......they are the same thread as a spark plug......so you may need a spark plug chaser.....
As Shurkey said, it's possible the threads could be damaged., so that a thread chaser doesn't help.....
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