David,

I haven't had the occasion to have a problem like this on my van - or
even to try and remove an exhaust nut on a WBX - but in my aircraft
mechanic days, when this kind of problem arose, a nut splitter was used.
If that doesn't work - try soaking the nut and stud for 24 hours with
Marvels Mystery Oil - the actual oil - not that top-overhaul-stuff.
Then, apply the 200 tap principle using a socket that will fit over the
stud, but rest the shoulder of the socket against the face of the nut.
Then try and remove with a proper fitting socket. If it does not loosen
up - repeat with 200 more taps. If that doesn't do the trick, grind the
nut down carefully  on one flat, then try to turn the nut.  The grinding
down should weaken the metal sufficiently for it to stretch just enough
to break loose. If all that fails - grind the nut off with expectation
to replace the stud.

John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com

David Marshall wrote:
> I am trying to replace the turbo on my Syncro TriStar.  It it held on
> to the manifold with three 13mm nuts, these nuts go on to studs which go
> into the manifold.  I really don't want to break the studs.  I
> can put enough pressure on the socket where I know if I go much further
> the stud will break.
>
> Three days of penetrating oil
> "3-IN-ONE 'High Performance Penetrant'" and no with luck other
> than my garage stinks.
>
> I've tried the tighten a bit and
> then loosen which seems to work with allen bolts and light tapping with
> the impact gun... they're still in place.
>
> What should I do
> next?
>
> David Marshall
> VW Adventure Driver and BMW
> Adventure Rider
>
> HasenWerk
> http://www.hasenwerk.ca
>
>
>