2000 A6 2.7T brake squeal

[Grant Lenahan]

Before I got to the end of your post I was planning to suggest a  
backing material - either one that sits there like an adhesive pad,  
or a spray on. Dislaimer- so far I dont use them nor need them. But  
many do.

Grant
On Apr 19, 2008, at 10:07 PM, kf21857 at comcast.net wrote:

> I have been away from this list for a while so this is my first  
> post in several years.  Not that I don't like you guys, but nothing  
> has broken that I couldn't figure out with the help of my trusty  
> Bentley manual.
>
> Last summer I finally took the plunge and traded up from my 90Q20V  
> to a clean 2000 A6 2.7T with 6 speed manual.  Except for the usual  
> problems with window lift cable attachments, failing instrument  
> cluster display and oil dripping on the right turbo, it has been  
> very enjoyable.  Recently I noticed that the front brake pads were  
> getting thin so I decided it was time for a brake job.  These are  
> the heavy duty brakes with 4 pads per caliper, same as on the  
> Allroad and (I think) S4.  The rotors had been replaced the last  
> time the brakes were done and had never been turned so they cleaned  
> up nicely and are still well within limits.  Everything went back  
> together with no problem and I installed a set of pads from  
> Blaufergnugen ("Hi-Performance Street Brake Pads, Low Dust, No  
> Squeal").  The problem is that they squeal like crazy, not under  
> hard braking but just as the car is about to stop rolling.   
> Actually more of a deafening screech that causes people in nearby  
> cars to turn around to se
> e what is happening.  Sometimes I resort to using the hand brake to  
> bring the car to a complete stop.
>
> I have taken the pads out twice and sanded them to remove the  
> glaze.  Once they warm up after a couple of miles and a few stops,  
> the squeal comes right back.  Because of the locating pins, there  
> is only one way the pads will go into the calipers so no question  
> of things being assembled correctly.  I even tightened up the metal  
> fingers that hold the pads in place, thinking that maybe one of the  
> pads was chattering.  I did notice that the Bentley refers to  
> removing protective foil from the backing plates and that the old  
> pads seem to have the remains of some kind of black goop that  
> apparently stuck them to the pistons.  The new pads didn't have  
> this.  Could this be my problem?  Has anybody else encountered  
> this?  I have done quite a few brake jobs on various Audis over the  
> years and I am not a novice at this but this has me baffled.   
> Should I just bag it and try a different set of pads?
> thanks,
> Dave
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