Generally ....you should own a dedicated O2 removal tool.,,usually a
special socket.
Check with a Tool Truck ...Snap-On, Mack, etc.
or go online.
I wouldn't dream of not having one.

and I've had to heat the boss where it's screwed,  in with a torch, many
times.
Scott

On 10/1/2015 6:37 AM, Dennis Jowell wrote:
> I just started to replace my O2 sensor on my 2.2 wbx. No,luck using my wrenches . Everything is rusted together. The catalytic converter is only about a year old. Is there a better way to remove the sensor? Should I use my touch to heat the sensor ? Any ideas would be great. I might get to Quebec yet just have to get this done.
>
> Regards,
> Dennis
>
> Dennis Jowell
> Scotch Hollow Farm
> Newbury, Vermont
>