There is a deep slotted socket for O2 sensors available at your FLAPS to
remove it.  Put some heat on it, then try it, you will not hurt the cat.

-----Original Message-----
From: Dave L <k1cajun@PIPELINE.COM>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Monday, June 12, 2000 6:03 PM
Subject: Is it safe to saw through an o2 sensor ?

>I bought a replacement o2 sensor for my 89.  But I can't get the old
>one off - it's rusted on pretty good.  Tried using rust solvents with
>no success.  So my next step may be to saw through the sensor so the
>remaining stub is short enough for a 22mm socket on a breaker bar.
>The deepest socket I found is too short to fit over the intact unit.
>
>Thing is, I don't know what is inside the o2 sensor that makes it able
>to sense oxygen levels and I'm worried it might be some kind of cancer
>causing substance that I should not be creating clouds of.  Anyone
>know the answer ?  If it means saving my health, I'll just buy another
>catalytic converter.
>