I recently had the master cylinder replaced on
my '89 100 and was told that the pressure accumulator was bad. I have
noticed for several months the brake light activating for several seconds after
braking. Based on these data, I obtained a replacement accumulator
(matching Audi p/n as original, newer style with O-rings instead of crush
washers) from DADS recycling and attempted the job myself. I followed the
procedure detailed at: http://20v.org/brakprob.htm#bomb and
now find that the brake light stays on all the time, braking force is greatly
decreased (heavy pedal force required for basic stopping) and steering
side-to-side is also difficult (I am avoiding driving it until I know what may
Although approx. 1 liter of pentosin (green 7.1
type) was recovered between emptying the reservoir and disconnecting the hose
from the front of the accumulator, only approx. 0.25 liter was sucked back in
during 8 or 9 minutes instead of the typical 5 minutes of idling during the
refill process. That was the first clue that something was wrong. I
performed five cycles of lock-to-lock steering for self-bleeding and noticed the
pentosin level drop but still used nowhere near the 0.5 to 1.0 liter estimated
in the instructions. I see no evidence of leaks and am trying to figure
out where I messed up.
1) I didn't follow the correct
2) bad replacement
3) other ideas?
I would appreciate any ideas!!!