[s-cars] S4/S6 brakes

Sun May 16 18:42:03 EDT 2004

Rear brakes need to adjust the relative position of the e-brake cam.
Think about it, if things didn't adjust in the caliper, as the pads wore
down you would have to pull the P-brake handle higher and high until it
would no longer engage the parking brake.

It really seems that winter salt (and the other crap they use) really gets
at the rear calipers. If you find that the pedal is nice and happy like
after you reset (by changing the pads) the clearance of the rear brakes, my
guess is that the pistons are hanging up in the calipers. My car is showing
signs of this again, so I may be in there to clean and reset things.

Mark
----- Original Message ----- 
From: "Bill Clancy" <clancybill at yahoo.com>
To: "Mark Strangways" <strangconst at rogers.com>
Sent: Sunday, May 16, 2004 6:33 PM
Subject: Re: [s-cars] S4/S6 brakes

> well... I am totally lost.
>
> I thought disc brakes do not have the adjustment problem.   I know about
> drum brakes but disc?
> yes, it's true -- I never hit the brakes in reverse.  I use the
> engine/clutch to get me moving forward.
>
> can this really be the problem?
>
> ----- Original Message ----- 
> From: "Mark Strangways" <strangconst at rogers.com>
> To: "Bill Clancy" <clancybill at yahoo.com>; <s-car-list at audifans.com>
> Sent: Sunday, May 16, 2004 3:17 PM
> Subject: Re: [s-cars] S4/S6 brakes
>
>
> > Bill, do you use the parking brake ?
> > Do you use the brakes while in reverse...?
> > Many people back out of the driveway, but never really use the brakes to
> > stop before going forward. Myself included.
> >
> > What I am getting at is that the rear brakes are not adjusting
themselves
> > properly. Part of the car's poor brake feel is from the rear pads being
> too
> > far away from the disc. Too prove this to myself, one day for shits and
> gins
> > I plugged the master cylinder's rear brake circuit. You would not
believe
> > how hard the pedal was. This was with my 996 TT over 993 rings, but none
> the
> > less it felt much firmer than same config but with the rear brake
circuit
> > active.
> >
> > Try to look at the spring return on the parking brake at each caliper,
> > verify that they are free and return to the stop on the caliper...
> > Go into the car and apply modest pull on the parking brake lever and
then
> > apply the brakes.. do this a few times. Do not reef the darn time, as
you
> > may break the cable, now there is a pain the arse to change.
> > Ad some lube to the seal area of the caliper, but be selective as to
what
> U
> > use, you don't want to create a sticky mess there. It will just trap
dirt.
> >
> > Mark
> > ----- Original Message ----- 
> > From: "Bill Clancy" <clancybill at yahoo.com>
> > To: "Bill Clancy" <clancybill at yahoo.com>; "Ian Duff" <iduff at rcn.com>;
> > <s-car-list at audifans.com>
> > Sent: Sunday, May 16, 2004 4:53 PM
> > Subject: Re: [s-cars] S4/S6 brakes
> >
> >
> > > After hitting send....
> > >
> > > What do you think about what I wrote regarding the rear pads?  If I
> > replace
> > > them, the brakes feel great but only for a week.   Why is that?
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Bill Clancy" <clancybill at yahoo.com>
> > > To: "Ian Duff" <iduff at rcn.com>; <s-car-list at audifans.com>
> > > Sent: Sunday, May 16, 2004 1:48 PM
> > > Subject: Re: [s-cars] S4/S6 brakes
> > >
> > >
> > > > thanks for the info.
> > > >
> > > > I'll get to work on it and see if I can improve the feel and
stopping
> > > power.
> > > >
> > > > thanks, I'll let you know if I am successful.
> > > > -Bill
> > > >
> > > > ----- Original Message ----- 
> > > > From: "Ian Duff" <iduff at rcn.com>
> > > > To: "'Bill Clancy'" <clancybill at yahoo.com>;
<s-car-list at audifans.com>
> > > > Sent: Sunday, May 16, 2004 1:40 PM
> > > > Subject: RE: [s-cars] S4/S6 brakes
> > > >
> > > >
> > > > Ooh, another thought just after hitting "Send": The rubber brake
lines
> > > might
> > > > be bubbled and ready to let go. Your symptoms are similar to
symptoms
> I
> > > had
> > > > with air in the lines, and to symptoms another time just before I
> burst
> > a
> > > > rear line. Please be sure to check the rubber lines both visually
and
> by
> > > > feel to be sure there are no hernias on the brake lines.
> > > > -Ian Duff.
> > > > -----Original Message-----
> > > > From: Ian Duff [mailto:iduff at rcn.com]
> > > > Sent: Sunday, 16 May, 2004 4:36 PM
> > > > To: 'Bill Clancy'; 's-car-list at audifans.com'
> > > > Subject: RE: [s-cars] S4/S6 brakes
> > > >
> > > >
> > > > Sounds like maybe some air in the lines. Pressure bleed out all the
> > stuff
> > > in
> > > > there, replacing it with something good like ATE or Motul. By
> replacing
> > by
> > > > pressure bleed, you'll be pretty sure it's not the fluid, and it
won't
> > > hurt
> > > > to have all new fluid in there, to boot. HTH -Ian
Duff. -----Original
> > > > Message-----
> > > > From: s-car-list-bounces at audifans.com
> > > > [mailto:s-car-list-bounces at audifans.com] On Behalf Of Bill Clancy
> > > > Sent: Sunday, 16 May, 2004 2:11 PM
> > > > To: s-car-list at audifans.com
> > > > Subject: [s-cars] S4/S6 brakes
> > > >
> > > >
> > > >
> > > > OK... I promise not to rant about the bad brakes.   But I would like
> > some
> > > > help.
> > > >
> > > > I think my car has unusually bad brakes.   I am not looking for
brakes
> > for
> > > > the race track.  I just want ordinary brakes like I find in any
> average
> > > car.
> > > >
> > > > Here are the symtoms.
> > > > Pedal feels muddy
> > > > There seems to be a slight delay when applying the brakes
> (occasionally
> > > > almost causing me to rear someone) It takes extra pedal pressure to
> stop
> > > the
> > > > car
> > > >
> > > > but...
> > > > If I slam on the brakes, the anti-lock works (if needed) and the car
> > will
> > > > stop just as well as any other car..using medium pedal pressure.
> > > >
> > > > Other data points:
> > > > Changing the front pads with new ones makes almost no difference at
> all.
> > > > Changing the rear pads will give me back great brakes, but only for
a
> > week
> > > > or so while they wear in.   Then I am left with shitty brakes again.
> > > >
> > > > I almost feel like the master cylinder is defective.   maybe it
> engages
> > > the
> > > > rear first and wears them out, leaving me with glazed rear pads.
> > > >
> > > > Do any of the symptoms above sound familiar?   Is this what others
> > > > complained about leading to bigger calipers and rotors?
> > > >
> > > >
> > > >
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