in the case of nuts on studs,
I just heat the nut with a oxy-acetylene torch until it's red hot - that
usually works just fine.

----- Original Message -----
From: "David Marshall" <mailinglist@FASTFORWARD.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, February 08, 2010 3:46 PM
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