[Vwdiesel] Re: Continuing brake Problems

[crusader]

Chris and everone else,

Thanks again for all you help.  The proportioning valve was leaking air.
Got a new one from vwparts.com for $68.  she's running great now.

Regards,

Kerry

----- Original Message -----
From: "Chris Boyer" <boyer at cts.com>
To: "crusader" <crusader at nccw.net>; <vwdiesel at vwfans.com>
Sent: Monday, January 06, 2003 10:37 PM
Subject: Continuing brake Problems


> Hi, Kerry....if you're bleeding the brakes and every time you get air,
that
> means
> there is air leaking into the system.  Unless your proportioning valve has
a
> leak, I doubt it's defective.
>
> Before you spend your money on a proportioning valve, replace that rear
wheel
> cylinder which bubbles upon bleeding, and give it another shot.   I think
I
> spent
> about $6-$12 for a wheel cylinder last time I bought one.
>
> If your mechanic is sure it's the proportioning valve, let him buy it and
> put it in.
> Pay him if it works.  Ask him to explain how a bad proportioning valve
causes
> air bubbles in the fluid.  Please send me his response; I'd love to know.
>
> If you're damned sold on replacing the proportioning valve, and don't want
to
> spend the money for a factory unit, get one from Wilwood.  You'll need to
> adjust
> it, but you can manually adjust the pressure differential between the
front
> and rear
> brakes.  Make sure the proportioning valve you are replacing doesn't have
a
> delay valve built in.  The delay valve keeps the front brakes from
applying
> until
> the rears have about 150psi line pressure.  The 150psi gives the rear
> brakes a chance
> to overcome return spring pressure so they apply at the same time as the
> front brakes,
> which do not have return spring pressure to overcome.
>
>
> Let me know what you find if you get a chance.  I think you're overlooking
> something
> really simple, but deceptive.  You'll get it.
>
> Regards,
>
> Chris Boyer
>
>
> At 07:13 PM 1/6/03 -0500, crusader wrote:
> >After much frustration, I broke down and took to car to my local mechanic
> >who also believes that it is the proportioning valve.  He also added that
it
> >is pricey.
> >
> >Does anyone know of a used one for sale?
> >
> >Thanks,
> >
> >Kerry
> >----- Original Message -----
> >From: "Chris Boyer" <boyer at cts.com>
> >To: "Nate Wall" <nwall at opei.org>; "crusader" <crusader at nccw.net>
> >Cc: <vwdiesel at audifans.com>
> >Sent: Monday, December 30, 2002 2:11 PM
> >Subject: Re: [Vwdiesel] Continuing brake Problems
> >
> >
> > > I had a bad rear wheel cylinder on an A1 and it just wouldn't bleed.
It
> > > didn't leak
> > > in the pressure mode, but it sucked in air when it retracted.  I bled
the
> > > damn thing
> > > for hours until I talked to a buddy who suggested replacing it.  Cured
it.
> > >
> > > Regards,
> > >
> > > Chris Boyer
> > > San Diego
> > >
> > > At 10:59 AM 12/30/02 -0500, Nate Wall wrote:
> > > >What type of VW? The A-2 Jettas have a load-sensing proportioning
valve
> > > >next to the rear axle beam that sometimes leaks fluid.
> > > >
> > > >--Nate
> > > >
> > > >crusader wrote:
> > > >
> > > > > This is a multi-part message in MIME format.
> > > > > --
> > > > > [ Picked text/plain from multipart/alternative ]
> > > > > Thanks to all of you who responded to my question last week about
my
> > > > failing master cylinder.  I replaced it and bled all 4 wheels.
However,
> > > > on the rear driver side, the line bubbled and foamed no matter how
much
> >I
> > > > bled.  After noticing that I had good "pedal" I gave up.
> > > > >
> > > > > Now, four days later, my pedal started to sink and after two more
days
> > > > I was back to pumping 3-4 times before I got any braking action.
The
> > > > difference now, is that after I pump it up, the pedal does not sink
as
> >before.
> > > > >
> > > > > I just bled that back wheel again and I continue to get foaming
fluid
> > > > out of the wheel cylinder.  Can the wheel cylinder be the problem?
> > > > >
> > > > > Thanks again,
> > > > >
> > > > > Kerry
> > > > > --
> > > > >
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> >
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