[s-cars] Hard brake pedal - but the light is off. thoughts?

[Fred Munro]

Jamie;

More than a few drops coming out of the servo with the engine running is too
much. How much fluid came out? Sounds like your servo may be leaking by and
not allowing pressure to build in the system. When my servo failed there was
a good flow passing through it, but it was totally blown.
A 2 year old bomb should be OK unless it was sitting on the shelf for 10
years before they sold it to you. What was the manufacture date on the bomb
packaging?

The light flashes when you stab the brakes because the pump can't supply
enough volume to satisfy the brake boost demand and you have no pressurized
fluid stored in the bomb. The car is dangerous to drive in this condition.
You don't want to run out of brake boost in a panic stop - the brakes just
go away.

HTH

Fred Munro
'97 S6


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of james McCarthy
Sent: July 1, 2007 11:33 PM
To: s-car-list at audifans.com
Subject: [s-cars] Hard brake pedal - but the light is off. thoughts?


Folks,

Returned to the s6 after a week away.
Very hard pedal feel. Softens slightly after running
for 10 seconds or so The "brake" light behaves
normally - on for start up and off after 15 seconds or
so.

When I stab the brakes the light flashes briefly -
this doesn't occur when I press it lightly.

So bomb?  The pedal becomes rock hard with just two
strokes in the bomb test.
But it's only 2 yrs old and if it is the bomb why
isn't the light on all the time and shouldn't I have
relativly normal braking when the car has been running
for several minutes?

The servo?
I disconnected the return line on the servo - no fluid
come out.
When I started it some fluid came out of the servo -
but how much is too much?

Pump is about 16 months old...

I'm tempted to do the bomb and a flush.

thoughts?
tia
-jamie





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