Brake master cylinder

[Kneale Brownson]

I could find no way to disassemble the brake MC on my 200q20v sedan 
short of hacksawing it.  Looked like the assembly exterior was formed 
around the internals in some sort of press.

On 12/1/2011 2:43 PM, jlagnese at massed.net wrote:
> I have one that was suffering from the brake freeze
> up. Its just been sitting in my garage for a couple
> of years.
>
> John
> ---- Original message ----
>
>    Date: Thu, 1 Dec 2011 10:17:50 -0500
>    From: "Jay Kempf"<jkempf at madriver.com>
>    Subject: RE: Brake master cylinder
>    To: "'Bernie Benz'"<b.benz at charter.net>
>    Cc: PeterBergin at aol.com, 200q20v at audifans.com
>    >
>    >Gotta find a used master cylinder to rebuild. The
>    only one I have found so
>    >far is in Germany. Got nothing to measure right
>    now without disabling the
>    >car.
>    >
>    >
>    >
>    >
>    >jfk
>    >
>    >
>    >-------------------------
>    >Jay Kempf
>    >jkempf at madriver.com
>    >802 272 5868
>    >
>    >
>    >
>    >  _____
>    >
>    >From: Bernie Benz [mailto:b.benz at charter.net]
>    >Sent: Thursday, December 01, 2011 10:15 AM
>    >To: jkempf at madriver.com
>    >Cc: PeterBergin at aol.com; auditony at gmail.com;
>    200q20v at audifans.com
>    >Subject: Re: Brake master cylinder
>    >
>    >
>    >So, just go do it! Talk won't do it.
>    >
>    >On Dec 1, 2011, at 6:14 AM, Jay Kempf wrote:
>    >
>    >
>    >Depends on what your tolerance is for cheap
>    chinese rebuilds. Anywhere from
>    >$100-150 for rebuilds and $300-$500 for supposed
>    new original parts.
>    >
>    >Seals are basically free and the only thing that
>    ever goes bad. I rebuild
>    >stuff all the time that supposedly you can't
>    rebuild. I trust my own work
>    >more than rebuilders. I rebuilt every hydrualic
>    unit and all of the CIS fuel
>    >injection stuff in my 928. The fuel distributor
>    was selling for something
>    >like $1100 new. I rebuilt it for a handful of
>    free orings from an autoparts
>    >store near where I live. Took an hour of
>    measuring.
>    >
>    >
>    >
>    >
>    >jfk
>    >
>    >
>    >-------------------------
>    >Jay Kempf
>    >jkempf at madriver.com
>    >802 272 5868
>    >
>    >
>    >
>    >  _____
>    >
>    >From: PeterBergin at aol.com
>    [mailto:PeterBergin at aol.com]
>    >Sent: Thursday, December 01, 2011 9:09 AM
>    >To: jkempf at madriver.com; auditony at gmail.com
>    >Cc: b.benz at charter.net; 200q20v at audifans.com
>    >Subject: Re: Brake master cylinder
>    >
>    >
>    >
>    >Hate to ask, but how much is a new one. I bought
>    one from a local auto
>    >parts store 12 years ago for an old 5000 avant
>    that preceded my 200 which
>    >preceded my S6.
>    >
>    >I was only $75
>    >
>    >Pete
>    >
>    >In a message dated 12/1/2011 8:05:44 A.M. Central
>    Standard Time,
>    >jkempf at madriver.com writes:
>    >
>    >
>    >That has not been my experience with 20 year old
>    seals. They turn to hard
>    >plastic and stop working like a seal eventually.
>    There are a few Dorman part
>    >numbers for kits for different bore diameters for
>    VWs of the same vintage. I
>    >just need a MC off the car. For me sourcing seals
>    is not a problem. I have
>    >been in the trenches in engineering for decades
>    so I know how to measure and
>    >find the right seal even if I don't have a part
>    number. So back to anyone
>    >got a dead one they would like to donate to the
>    experiment? Boils down to
>    >two lip seals normally in Nitrile Rubber for DOT
>    3/4.
>    >
>    >
>    >
>    >
>    >jfk
>    >
>    >
>    >-------------------------
>    >Jay Kempf
>    >jkempf at madriver.com
>    >802 272 5868
>    >
>    >
>    >
>    >  _____
>    >
>    >From: Tony Hoffman [mailto:auditony at gmail.com]
>    >Sent: Thursday, December 01, 2011 8:25 AM
>    >To: jkempf at madriver.com
>    >Cc: PeterBergin at aol.com; b.benz at charter.net;
>    200q20v at audifans.com
>    >Subject: Re: Brake master cylinder
>    >
>    >
>    >Jay,
>    >
>    >I'm one that agrees with Bernie on this. Take it
>    apart and clean everything,
>    >inspect closely. If the rubber is not torn, no
>    reason to replace it. It will
>    >seal well, not intermittently. If you can get a
>    rebuild kit, by all means
>    >replace everything if you wish. However, they are
>    not available for any of
>    >these older Audi's that I'm aware of, and
>    therefore a real PITA to source
>    >each little piece. So, I jsut dissassemble, clean
>    out all the gunk (which is
>    >what is giving you problems IME) and reassemble.
>    >
>    >Tony
>    >
>    >
>    >
>    >
>    >Jay, DFWAB!
>    >Your MC is probably OK if the pedal does not go
>    to the floor, however
>    >slowly.
>    >And one does not need rebuild kits for MC or
>    calipers unless a boot is torn
>    >and needs replacement.
>    >Just clean the parts well and reassemble.
>    >
>    >
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