Pierburg Pump, Brakes, etc., etc.

[Ben Swann]

Any can, RF is typical.  Heat, stop and go and AC make it happen.

Replace the MC - BTDT many times.

Ben 
benswann at comcast.net
83 urq, /[][] =oooo= [][]\ alpine and Inga

'90 Coupe Quattro (==\ oooo /==) ES2 Conversion

91 200qa20v, [ =!\=oooo=/!= ] avant and sedan


-----Original Message-----
From: John S. Lagnese [mailto:jlagnese at massed.net] 
Sent: Monday, May 08, 2006 10:14 PM
To: benswann at comcast.net; 'Alex Kowalski'
Cc: quattro at audifans.com; benswann at comcast.net
Subject: Re: Pierburg Pump, Brakes, etc., etc.

Does this mean all brakes lock up or could just one, such as my RF brake.
John
----- Original Message ----- 
From: "Ben Swann" <benswann at comcast.net>
To: "'Alex Kowalski'" <hypereutectic1 at gmail.com>
Cc: <quattro at audifans.com>; <benswann at comcast.net>
Sent: Sunday, May 07, 2006 11:05 PM
Subject: Pierburg Pump, Brakes, etc., etc.


> Alex,
>
>
>
> You'll have no problem with the Pierburg pump.  As good as the Bosch OEM
> one.
>
>
>
> Yes - that is the master cylinder causing the problem you describe. 
> Don't
> procrastinate, replace it and be done with it.  Purge all that old fluid 
> out
> of the system.
>
>
>
> Ben
>
> benswann at comcast.net
>
> 83 urq, /[][] =oooo= [][]\ alpine and Inga
>
> '90 Coupe Quattro (==\ oooo /==) ES2 Conversion
>
> 91 200qa20v, [ =!\=oooo=/!= ] avant and sedan
>
> [Date: Sat, 6 May 2006 16:28:06 -0400
>
> From: "Alex Kowalski" <hypereutectic1 at gmail.com>
>
> Subject: Pierburg Pump, Brakes, etc., etc.
>
> To: quattro at audifans.com
>
> Message-ID:
>
>      <1030738a0605061328s1ed36e1fvb76918d866dd7513 at mail.gmail.com>
>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>
> Hi everyone,
>
>
>
> Since I'm the disreputable character who got everyone started on the
> Pierburg pump craze (apparently) I can only say that I haven't had the
> chance yet to install mine in the '87 5KCSTQ because of other issues.  As
> soon as I get it in there with a new filter I will let everyone know 
> exactly
> how it works.
>
>
>
> Since the weather has warmed up here, and I did my rear suspension and 
> brake
> calipers, and replaced my old, decrepit bomb with Dave Kase's wonderful
> remanufactured one (highly recommended -- installation was as much of a 
> snap
> as you get with these cars) I have also discovered to my endless
> consternation that I also have the infamous "brakes dragging when 
> everything
> is hot" syndrome.
>
>
>
> I've taken the car out for several spirited rides since doing the work on
> the rear end and the bomb, and one of the results was to get everything on
> the car nice and toasty.  And with the warmer weather, this means that the
> radiator cooling fan was doing its normal job, pumping hot, hot heat right
> at the brake master cylinder.  Which in the warmer weather is now causing
> the brakes to drag.  There are several posts in the archives about this.
>
>
>
> I tested it in a similar manner, and with another (wierder) method:  first

> I
> loosened the lines and got the fluid flow and the brake release to
> demonstrate to myself that yes, in fact, the brake system was being
> pressurized when it was hot.  Then I got a couple of those gel-pac cold
> compresses, got everything hot again, waited for the brakes to stick, and
> then wrapped the MC in freezing cold gel.  Voila!  After a few minutes the
> brakes came loose (with the engine still running!) so I am 99 44/100% sure
> the master cylinder is shot, too.  Not letting hot fluid back into the
> reservoir, perhaps.  In any case, it beats the price of replacing the 
> servo.
>
>
>
> I should have known.  The Audi Gods always get their tithe.
>
>
>
> I'll do the M/C along with the Pierburg and give everyone a full report.
>
>
>
> Cheers,
>
> Alex Kowalski
>
> '87 5KCSTQ -- Mostly done
>
> '86 5KCSTQ -- Supposedly the "project" car.  ROTFL.]
>
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
> ---
> Watch this space for ads :)
>