NG engine exhaust manifold/downpipe trouble

[jlagnese at massed.net]

Continue to remove the remaining ones. I replaced
several studs on my 16V Scirocco which is a similar
exhaust setup. It much better to have fresh studs
rather than the partially rusted 21 year old
originals.
---- Original message ----

  Date: Thu, 10 Sep 2009 13:47:00 -0400
  From: radek at istar.ca
  Subject: NG engine exhaust manifold/downpipe
  trouble
  To: quattro at audifans.com
  >Hi Guys;
  >
  >When removing the engine from my son's 1988 90Q
  for a clutch change, I
  >attempted to separate the exhaust manifold from
  the downpipe using an
  >impact wrench. The result is one pulled-out stud
  (the nut wouldn't
  >budge) and another mangled nut. These things are
  rusted in place
  >solid, like welded. I didn't touch the two
  remaining nuts and got the
  >engine out with the downpipe in place, lowering
  the subframe.
  >
  >Now I'm facing a choice: do I remove the two
  remaining nuts (or pull
  >out the studs) and replace everything properly
  (four new studs, nuts
  >and a gasket), or should I just fix the two
  problem spots? If the
  >latter, how to put in the new stud and make sure
  it doesn't come out
  >the next time? Red Lock-tite? That should make
  the bond permanent
  >but will it withstand the heat?
  >
  >I will appreciate any suggestions on how to
  handle the
  >manifold/downpipe problem, as well as what else
  to attend to, while
  >the engine is out. For example, is it worth
  replacing transmission
  >mounts?
  >
  >For new, the list includes new clutch, release
  bearing, guide, pilot
  >bearing and master/slave cylinders, and new
  engine mounts.
  >Thanks.
  >
  >Radek.
  >
  >
  >_______________________________________________
  >quattro mailing list
  >http://www.audifans.com/mailman/listinfo/quattro
  >http://www.audifans.com/kb/List_information