Pierburg Pump, Brakes, etc., etc.

[John S. Lagnese]

I'll be trying the flex line tomorrow. After that I will try the MC. The 
caliper is good. I've inspected it, cleaned it and it moves very freely.
I'll be posting my results.
John
----- Original Message ----- 
From: "Joshua van Tol" <josh at spiny.com>
To: "quattro quattro list" <quattro at audifans.com>
Sent: Monday, May 08, 2006 11:25 PM
Subject: Re: Pierburg Pump, Brakes, etc., etc.


> Just a single locked brake is probably a bad flexible line, or
> possibly a bad caliper.
>
>
> On May 8, 2006, at 9:14 PM, John S. Lagnese wrote:
>
>> 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 :)
>>>
>>
>> _______________________________________________
>> quattro mailing list
>> quattro at audifans.com
>> http://www.audifans.com/mailman/listinfo/quattro
>> ---
>> Watch this space for ads :)
>
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
> ---
> Watch this space for ads :)
>