Tapping o2 sensor threads

[Gregor185]

Replacing my one o2 sensor and it's been out for a couple months and some rust developed so I want to clean up the threads. Does anyone know for sure what size I need? I measured and what I came up with was M18 x 1.50 but I want to be sure without screwing it up. Thanks

 

[96blak54]

Been awhile since ive meesed with o2 bungs, but im 99% positive you are right with 18x1.5

 

[lutter94]

I'm here for the other 1%. They are M18x1.5


http://www.oreillyauto.com/site/c/d...or+thread_-1_836&keyword=oxygen+sensor+thread