# It was very dirty down there because of my undercoating, but it was finally done. No more rotten egg smell. Thanks guys. n/m

Posted by Will (93 4dsc) on July 13, 2003 at 17:27:07: In Reply to: Replace EGO Sensor at NOT or cold? posted by Will on July 12, 2003 at 21:56:48: : I hope to hear from someone who's done the oxygen sensor before. I was told that you should replace it when the car's at operating temperature when it's easier to remove. However, just like spark plugs, I am under the impression that if I do it while the car's warm, that when it cools, the metal that contracts will tighten around the sensor and mess up the threads. Can anyone clarify for me? Thanks in advance. Replys:

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: : I hope to hear from someone who's done the oxygen sensor before. I was told that you should replace it when the car's at operating temperature when it's easier to remove. However, just like spark plugs, I am under the impression that if I do it while the car's warm, that when it cools, the metal that contracts will tighten around the sensor and mess up the threads. Can anyone clarify for me? Thanks in advance. :