Oxygen Sensor Thread Chaser
Lisle Corporation offers its Oxygen Sensor Thread Chaser (12230).
It cleans threads in oxygen sensor holes. Use it with a 3/4” hex socket or a 3/8” square drive.
Size: M18x1.5 It also works on M18x1.5 spark plug threads. Important: Use anti-seize with this tool.
Lisle Corporation
http://www.lislecorp.com