>      The lesson to be learned here. Use anit-sieze
> compound on the threads, to prevent this problem again.
> WARNING: Do not get this compound on the sensor
> tip, for it will be damaged.

Good idea.  Also, after you have your local VW garage to the O2 for
the first time (after you busted your knuckle or the strained the
metal on the cat) and have them do it, go home and pull the sucker
out again and put the anti-seize compound on.  Don't wait until it's
time to do it again or it'll be frozen again.

I found that my local VW garage (bless their little hearts; they
understand waterboxers) torqued it on there pretty good.  Did the
above removal and anti-seize treatment, so now I'm fairly certain I
can do it myself the next time with an O2 sensor from Ron (shameless
plug :-).

-Karl

'87 Vanagon GL Weekender "Beverley"; Trexlertown, PA
http://www.enter.net/~bloss/vw/
VW shop list: http://www.enter.net/~bloss/vw/vwshops