Originally Posted by jr's3800
When you get the O2 sensor, look at the bottom for a dark grey or almost black coating that should be on the threads as the AC Delco O2'* come with an antisieze coating already applied to the threads.. I have never has any problem removing one that was already coated from the factory..
I use this stuff (Anti-Seize) all the time. Especially on exhaust components where I KNOW that one day, I'll be doing this job again. You're right, it does make it much easier to remove the bolts(or sensor) the next time.