You might try "Break Free CLP", has worked well for me in the past,
for this and other "stuck" problems.

BTW, once you do get it out, you might want to get a 18 mm (I
"think" this is the correct size) sparkplug chaser, and clean up the
threads before installing the new OS2.
Howard

On 31 Oct 99, at 19:22, Todd Guttman wrote:

> Does anyone have any suggestions for removing a stubborn Oxygen sensor
> in an 85 Westy?  The previous owner noted that it is orignal equipment
> and now quite reluctant to leave its 'home' in the left exhaust pipe
> after 117k miles.  Liquid Wrench, WD-40 and moderate amounts of
> 'brutane' have failed me.

hfleming@moosebird.com    Alexandria, VA   hfleming@moosebird.com
99 EuroVan MV - 97 Cabrio - 85 Vanagon - 84 Westy
84 Vanagon GL (spare parts that turned into a project)