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Safe to use penetrating oil when removing O2 sensors?

  • Sure thing -

    Votes: 3 42.9%
  • No way!

    Votes: 1 14.3%
  • Won't make a difference

    Votes: 1 14.3%
  • Buy new sensors just to be on the safe side

    Votes: 2 28.6%
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640 Posts
Mixed results will probably be posted. Silicon based penetrating products will mess with the oxygen sensor if it soaks to the ceramic part. That said, I've had great success with a little PB Blaster pointed directly towards the threads. I've also had success removing them while the exhaust is hot, just be careful where your arms and hands touch.
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