: 87 5000CS Proportioning Valve

[Mike Arman]

>
>Message: 9
>Date: Tue, 22 Jan 2002 16:05:30 -0800 (PST)
>From: Erik Gerrits <erik_gerrits at yahoo.com>
>Subject: 87 5000CS Proportioning Valve
>To: quattro at audifans.com
>
>I have done the search and read everything I could
>about the rear proportioning valve.  On my car the
>spring linkage is gone (rusted away I guess).  The
>rear brakes aren't working at all, I did take the
>calipers apart to make sure they work.  My question is
>what would happen if I removed the valve.  This should
>allow the car to have a 50-50 brake bias all the time,
>I think.  Also does anyone have any idea how much a
>new valve costs?
>Thanks,
>Erik
>Audi newbie, AWD Forever



U-pull-it junkyard part. $10, maybe - they have no idea what this is, or
what a new one costs.

To check if the replacement is OK, see if you can depress the little
spring-loaded buttons under the actuating lever. If they move easily and
equally (slight "click" if I remember correctly), the part is OK.

Bleeding the brakes will be a PITA, but at least you will have saved $190+,
and you'd still have to bleed the brakes with a new valve.

I do remember tying to take my old one apart (it had the same problem as
yours). It simply would NOT open up, and I had a great selection of various
implements of destruction available.

Best Regards,

Mike Arman

86 5KS, just like yours.