Joe,
I had the same problem. Mine came off with a little heat and a pipe
wrench. I was concerned about breaking the exhaust pipe, but it stood
up. The pipe wrench with a breaker bar worked for me. Good luck!

-Gregg
85 Westy, 199k

--
Gregg and Anna Carlen
webdesign@iafc.org
703-866-5136
_________________________________

Date:    Mon, 15 Jun 1998 21:58:44 -0400
From:    "Joe L." <jliasse@EMAIL.MSN.COM>
Subject: Can't get the %&#*!!! OFF!

    I am replacing the O2 sensor on my 83,5 Westy. The sensor is
origional
and, having been there for the last 15 years has appearently decided it
will
not come off without a fight.
   I have already tried the "conventional " methods (penetrating oil,
heating, etc) all have failed.  I have not yet forced the issue to the
point
where the flats on the griping surface have rounded off and don't really
care to put that much "beef" to it until I check in here. I had thought
of
hack sawing it flush with the pipe, drilling out the rest of the sensor
then
picking the remaining peices from the threads but this is a lot more
work
than I would like to do if there is a way I can avoid it.
    Anyone out there have a "secret family reciepie" for getting these
things off?