[s-cars] wastegates and tools

[Paul Krasusky]

This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.
--
[ Picked text/plain from multipart/alternative ]
Gee Bob, I TRIED to buy a few Snap On tools to do the wastegate job
properly, but was informed that YOU bought everything they could manufacture
for the next decade and there was none left!  Hey, don't knock my
ultra-poverty tool selection, it's all been free so far, my favorite kind of
tools.

ANYway, now that I'm back, I don't really feel much a difference in the
seat-o-pants (or is that seat-o-flame-suit, as I know I'll be slammed for
not posting empirical data?).  The pulsing shriek noise has been reduced,
but not eliminated.  Maybe the slightest gain in low end, but it's really
nothing very noticeable.  Worth the effort?  Dunno, it didn't appear to hurt
anything, so I guess it's worth it.

-Paul in need of real tools K.
CT
'95 //S6




From: "Bob Rossato" <bob.rossato at att.net>
To: <konecc at snet.net>, <s-car-list at audifans.com>
Subject: RE: [s-cars] MTM chip wastegate adjustment
Date: Tue, 13 Aug 2002 21:49:05 -0400

Rich,

A couple of weeks ago I gave Paul K. a hand doing this to his S6.  Neither
one of us had done this mod before so we were sort of flying blind being led
only by poor memories of old posts on how to do it.

First of all, it isn't really a plug that needs to be pulled out.  There is
a metal disc that covers the adjustment screw and you essentially need to
machine it away.

The adjustment screw has a 5mm or 6mm hex in it (Don't really know the size
as Paul didn't have any metric allen keys, and the english one that was
close enough wasn't marked so I'm guessing at the size.), and it is directly
under the disc so you don't want to drill any further than it takes to break
through the disc or you risk damaging the hex opening.  I would use the
biggest diameter drill bit that fits within the opening where the disc is.

We ended up using a 3/8" drill bit (limited by tool availability again) and
it was just barely big enough to leave an opening that allowed us to muscle
the allen key in (because you can't drill all the way through the disc the
angled tip of the drill results in an opening that is obviously smaller than
the drill bit diameter).  An end mill bit on a dremel might work better.

It was difficult to get the adjustment screw to turn, but I don't know if
that was due to loctite or just the fact that there was still some
interference from the disc.  I just kept twisting it back and forth and
eventually it started turning.

We ended up doing this with the cap removed but I don't see any reason why
you can't do it with the cap on.

I think this cured, or at least greatly minimized, the noise Paul was
getting (he also has the MTM chip) but we'll have to wait until he gets back
from vacation next week for a full report.

Bob