I have a problem with the front brakes on my 5ktq.

[Andrew Lundy]

Your master cylinder is bad.  It's not releasing the pressure after you take
your foot of the brake.  When master cylinders go bad there are two(main)
failure modes:

1)  You can't build up enough pressure when the brake is applied.  (or can't
hold the pressure for long)

2)  They don't properly release the pressure when the brake is released!!

You have the second one...I just had the first one on my car('90 80Q).  It's
really a pretty common for older master cylinders.  Replace your master
cylinder and you'll be as good as new!!!

Good Luck
---
Andrew Lundy
fast928 at prodigy.net
90 80Q
91 90
95 90Q


----- Original Message -----
From: "Jörgen Karlsson" <jurg at pp.sbbs.se>
To: "Audi Quattro List" <quattro at audifans.com>
Sent: Sunday, November 05, 2000 5:51 AM
Subject: I have a problem with the front brakes on my 5ktq.



When the engine compartment temperature is high the brakes will not releast
properly, when this happens the brakes will of corse be very hot and the
pads and discs expand even further. Yesterday I had to stumble in to a gas
station at full throttle and full boost to keep the speed abouve 30! After
letting the underhood temp cool down for half an hour the brakes worked as
usuall. I have tried to leave the bonnet closed at these times, then it
takes a very long time before the brakes work again, I guess that the ABS
unit is causing the problems... Any other ideas?


Since I have had to disable the ABS earlier because of its less then optimal
performance on bumpy roads I can just as well do away with the entire ABS
system. Has anyone done this while keeping the same master cylinder? Where
is the brake assist connected?

Thanks in advance,

Jörgen Karlsson
Gothenburg, Sweden