NG engine exhaust manifold/downpipe trouble

[Al s]

I would replace both the engine mounts and the transmission mount. Now is
the best time, the engine is out.

Al

-----Original Message-----
From: quattro-bounces at audifans.com
[mailto:quattro-bounces at audifans.com]On Behalf Of radek at istar.ca
Sent: Thursday, September 10, 2009 7:47 AM
To: quattro at audifans.com
Subject: NG engine exhaust manifold/downpipe trouble


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.


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