Re: LEAKING BRAKE PROPORTIONING VALVE - 1986 4KQ

[Wolff <wolff_b@ix.netcom.com>]

I got one from Linda at Carlesen for around $75 US. It might have been
less. I don't know if they will ship to Canada or not. Maybe Blau will?
or perhaps "the parts connection" will. In any case, trying to seal it
isn't going to work.
Wolff

Dean and Heather Sutherland 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.