[urq] Easy subframe bushings replacement

[Bill Bennett]

Hey David, nothing wrong with a helicoil, I have repaired more than one
front crossmember mounting nut that would not hold the torque and turning
angle with no problem, without BUTCHERING needlessly the side of the frame
rail. I think you did the right thing, Bill
----- Original Message -----
From: "Schaible, David" <David.Schaible at jrspharma.com>
To: <Louis-Alain_Richard at computerhorizons.com>; <urq at audifans.com>;
<quattro at audifans.com>
Sent: Monday, October 25, 2004 6:12 AM
Subject: RE: [urq] Easy subframe bushings replacement


I posted on this for my 200 20v and got blasted by everyone when I said
I put in a "regular" bolt (what I meant was regular oem).....i waited
two days to get the oem bolt because of the proper shoulder height and
guaranteed proper hardness.....i was also blasted by misinformed
individuals because I used a helicoil insert rather than cut a big hole
in the frame as per audi's recommend procedure...........that repair job
still working well after major abuse.....if it were my car louis-alain,
I would order the oem bolts and swap them in when you get them, they
cost a lot for bolts, but really are small $$ in the big picture.




David Schaible




JRS Pharma LP
2981 Rte 22
Patterson, NY 12563
845.878.3414

ALL STATEMENTS IN THIS CORRESPONDENCE ARE CONFIDENTIAL UNLESS OTHERWISE
NOTED

-----Original Message-----
From: Louis-Alain_Richard at computerhorizons.com
[mailto:Louis-Alain_Richard at computerhorizons.com]
Sent: Wednesday, October 20, 2004 4:26 PM
To: urq at audifans.com; quattro at audifans.com
Subject: [urq] Easy subframe bushings replacement

Hi there,

I just installed the 4 OEM bushings on the rear subframe, and the job
was
even easier than last week's (front subframe).
Why?
Because I followed one listers suggestions: put the rubber bushings in
the
freezer for an hour. Installation was nearly effortless... but I can't
say
if it's more the freezer or because I am now a semi-pro of bushings
installation (I have done the 16 on my car...)!
Nonetheless, the harder the rubber, the easier it will slip in place,
with
less deformation of the "bulge".


However, I have some questions regarding the bolts and their torquing.

Since all the subframes bolts must be replaced (per Bentley), and my
dealer doesn't stock them, I went to my FLAPS and bought some M10X85
bolts.

Now, can somebody tell me if these bolts (grade 8.8) are correct for
this
application ?
What is the difference with the 8.9 grade we more usually see ?
Are the OEM bolts (N 905 569 02) special high strenght bolts ?

For the torquing:
Bentley says torque to 25 ft-lbs and then add a quarter turn more. I did

just that.
But even after that, I still feel that the bolts are "under torqued"...
It
was real easy to add that quarter turn. More, there is no provision for
securing the bolts in place (no Loctite, no lock washers, nothing...).

Am I paranoid ? Should I leave this all alone and don't worry about it
anymore?

Thanks in advance,

Louis-Alain
1983 Quattro, gliding over bumps now...
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