Removing 02 sensor
 

No one talks about it but can you use PB Blaster to spray at base of old sensor to help loosen and remove? That stuff is amazing ! Thanks, Nick.

Whatever it takes. Those suckers can get seized pretty hard.

Spraying anything that contains silicone on an oxygen sensor will contaminate it. Check the ingredient list.

Same thing goes for dousing down the pipe to get some on the threads without cleaning everything up before screwing in the new sensor. The sensor actually compares oxygen in the exhaust to that in the air outside around the sensor, so the silicone can contaminate your new sensor rather quickly.

The usual method to eliminate seizing is to use the high temp anti-seize. But yes, sometimes they get stuck in place. Use a high quality crow foot socket made for oxygen sensors.

you cannot spray on the threads or the sensor itself ,it is inside the cat or pipe;-)

Ivan

drive it a little and when hot warm remove it

Ivan

I got a tough one out recently by heating the bung with a MAPP torch, use an open-end wrench on the sensor body, and then try to unscrew it by tapping on the wrench with a hammer.