UrS4 Strut pinch bolt size & Bira brake bracket interference

[dgraber460 at aol.com]

My reason for "qualifying" my remarks is evident.
My experience is with the URQ struts, and the ball joint for them is grooved in such a way that if the bolt is the correct diameter and present, the joint cannot come out. 
I have seen a 928 loose a BJ while moving and agree it is _not_ an area to try to substitute or save money.

Dennis 
Denver


-----Original Message-----
From: Fred Munro <munrof at sympatico.ca>
To: dgraber460 at aol.com; talleycm at gmail.com; quattro at audifans.com
Sent: Thu, Jun 3, 2010 7:09 am
Subject: RE: UrS4 Strut pinch bolt size & Bira brake bracket interference


There have been a couple UrS listers who have had the ball joint drop out
hile the car has been in motion - one that I recall was at highway speed on
n Interstate. This is guaranteed to ruin your entire day. From what I
ecall, in one case the improper bolt had been used. In the other case
omeone at the shop had pried open the slot in the strut housing to release
he old ball joint when they were changing the control arm. The tool marks
ere still in the slot. This deforms the strut housing and it will never
old the ball joint again - the strut housing has to be replaced.
his is not an area to fool around with if you don't know the engineering
easons for some of the design choices. The Bentley states an orientation
or that bolt and there is a reason for that. They don't mention orientation
or many other bolts. Retention of the bolt if the nut falls off is a good
uess, but just having the bolt in the hole won't keep the ball joint in
lace. If that bolt loosens off the ball joint will pop out. My guess would
e it has something to do with the way the clamping pressure is put on the
trut housing. In any case, I'd recommend using the correct new bolt and nut
ach time it is loosened and orient it per the Bentley.
hris, removing the BIRA bracket is a PITA, but I'll guarantee it will be
ore of a PITA if the ball joint drops out while you are driving the car!
JMHO
Fred Munro
97 S6
-----Original Message-----
rom: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
ehalf Of dgraber460 at aol.com
ent: June 2, 2010 11:25 PM
o: talleycm at gmail.com; quattro at audifans.com
ubject: Re: UrS4 Strut pinch bolt size & Bira brake bracket interference

y understanding (which is only hearsay, and my own assumptions) is that a
rade 8 would be more than sufficient, and easily sourced.
y other assumption is that it is head forward so that in the rare case the
ut vibrates off, the bolt will be more likely to stay in place.
nyone with the true engineering "facts", feel free to chime in.
Dennis 
enver

-----Original Message-----
rom: Chris Talley <talleycm at gmail.com>
o: quattro at audifans.com
ent: Wed, Jun 2, 2010 9:35 am
ubject: UrS4 Strut pinch bolt size & Bira brake bracket interference

ello All
s the strut/ball joint pinch bolt a off the shelf or a dealer only part.
ther way does someone have a spec or a part number.
 had to grind the head off to remove thebolt and strut, because the Bira
acket for the BBK prevent easy extraction,  the Bentley indicates that the
ad should point forward, with the brake bracket it the way that will be
possible without removal of the bracket which I am relunctant to do. Why
es the bolt need to be instalelled in this direction and will it be a bad
ea to install backwards to aid future removal.
IA,
hris
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