Pelican Parts Forums - Should I remove my O2 sensor with a hot exhaust?

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- - Should I remove my O2 sensor with a hot exhaust? (http://forums.pelicanparts.com/101-projects-discussion-forum-bmw-3-series/752735-should-i-remove-my-o2-sensor-hot-exhaust.html)

Hi guys, I just replaced my sensor & the old one unscrewed like a dream. Disclaimer; this worked for me, I take no responsibility for the advice. I drove the car for an hour & ensured that the exhaust was very hot. I prepared with eye protection & thick gloves, I then used a shifter to remove the old sensor, a light tug is all it took. Mind you I did try removing the sensor cold, but it wouldn't budge. So the trick which worked for me is to replace the sensor when exhaust is very hot, but protect yourself & be careful. Best of luck in your DIY

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: Replacing your 3-Series E30 Oxygen (Lambda) Sensor

Yes heat does make the metal softer and easier to remove. Avoid using rust penetrate sprays because they have silicone in them and this will damage the sensor element.

- Nick