Stiff Brake Pedal and Burning Smell on 87 5ktq

[Sheffield Corey]

Hi Bill,

Another thing that this stiff pedal can be a symtom of is a brake
master cylinder going "south". I had this problem on warm days and as
it got worse it would happen on cool days also. After about twenty
minutes of stop and go driving the brake pedal would start to get stiff
and the brakes would start to drag. One way I could tell there was a
problem is the boost gauge would start reading higher than normal and I
wasn't calling for boost. It would get worse and worse as I drove until
all the pent up pressure would suddenly release and the boost would go
back to normal, but the process would just start all over again. My
"bomb" was fine; I can still get over 30 pumps out of it. But after
question the gurus on the list and some of the Audi parts people I was
told that there was an 80% chance it was the master cylinder(cheap...
relatively) and a 20% chance it was the brake servo unit behind the
master cylinder. I was lucky; it was indeed the master cylinder. No
problem since replacing it. But talk about hot (mostly front) brakes
whenever I parked the car. And it had a tendency to warp the disks
slightly.

HTH,

Shef



=====
Sheffield Corey
Wickford, Rhode Island U.S.A.
'87 5KCSTQ
'87 XL600R
'66 Corvette Coupe
Quattro: The way to GO! when conditions say: "NO!!!"
But as a wise fellow once said: "4x0=2x0".

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