M18 X 1.5 is the correct thread. Old Ford spark plugs! There isn't
enough depth for the Heli-Coil and the tool set in that size is pricey.
About the same as a new economy cat. When desperate, I get a nut and
weld it in place.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of jesse johnson
Sent: Wednesday, October 13, 2004 7:15 PM
To: vanagon@GERRY.VANAGON.COM
Subject: O2 sensor thread size? Helicoil kit part number?

Is the O2 sensor thread size M18 1.5? If so.. anyone know the helicoil
kit part number to tap this out and put new threads in?
thanks all,
jesse
89 carat