Re: LEAKING BRAKE PROPORTIONING VALVE - 1986 4KQ

[Daniel Jones <captaudi@ma.ultranet.com>]

	I believe that any of the common vendors mentioned on the list will have
the regulator.  The parts connection,  Blaufergnugen etc.  This is a common
problem on the 4000q and I don't know of many cars that have the factory
one in place.  When mine started leaking I bought it from a place called
"Rapid Parts" in N.Y. They shipped it UPS I had it in 2 days total bill
including shipping was $91.00,  this was two years ago but I assume prices
are probably close today.  If I remember right I had to supply them with a
Audi part#.  I believe this was 803-612-303.  Good luck,  and NO!! do not
try to repair it,  the one system you should never skimp on or "Mickey
Mouse" are the brakes.


Daniel Jones 86 4kcsq 258k and going strong.

At 09:19 PM 8/18/98 -0300, you wrote:
>The proportioning valve on my '86 4000 Quattro leaks brake fluid from a
>recess at the front of the casting.  (Some call it a pressure regulator too
>I believe, but in any event I'm referring to the casting that mounts
>directly beneath the master cylinder).  This "recess" is a hex shaped
>indentation with a small cylinder shaped protrusion inside, which is where
>the fluid appears to come from.  This is more of an inconvenience than
>anything since the brakes continue to work fine.  Since the dealer wants
>$303 Cdn (gasp!) for a new valve, I'm wondering if it would not be possible
>to simply plug the recess from which the fluid is weeping.  By "plug" I mean
>for example filling this recess with a sealant such as silicone (or whatever
>product might be compatible with brake fluid).  I realize this would be
>somewhat of a "band-aid" approach, but  I'm trying to keep the old girl on
>the road as economically as possible and I don't want to spend over $300 on
>a part if I don't have to.
>
>In case the overwhelming response from the list if "Oh my gawd don't plug
>that hole fool"!, I'd also appreciate any advice on vendors that might offer
>a better price and any "do it yourself" advice you might have for replacing
>it .  Thank you.
>
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