If the nuts are good enough a get a wrench to grab the hard part is over.
The trick is to use an oxy-acetylene torch, small carburizing (low oxygen)
flame and you want to quickly get the nut cherry red without getting the
stud to match. The nut will then come off. The challenge will be to do this
without setting the rust bust crap on fire. 

Dennis
  

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David Marshall
Sent: Monday, February 08, 2010 6:46 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Best method for remove seized exhaust nuts?

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