[s-cars] Front Brake calipers not releasing.....Master Cylinder?

Wed Apr 22 14:48:41 PDT 2009

The second time I bled, some very small bubbles were released, the third 
time was nothing but fluid out of all four corners.

Jim

----- Original Message ----- 
From: "Ian Duff" <iduff at comcast.net>
To: "Jim Fleischer" <jim at almgt.com>
Cc: "Scarlist" <s-car-list at audifans.com>
Sent: Wednesday, April 22, 2009 1:36 PM
Subject: Re: [s-cars] Front Brake calipers not releasing.....Master 
Cylinder?

> <conjecture>
> Plenty of pedal pressure could still exist with some air trapped in  the 
> lines, you'd just have to push the pedal a bit further to compress  the 
> air. If this is the case, you'd have a built-in spring keeping the  pads 
> against the rotors, as you describe.
> </conjecture>
>
> A better read would be the fluid coming out of the bleeder screws  during 
> bleeding. Was it COMPLETELY free of bubbles before you  tightened down the 
> bleeder screw?
>
> -Ian Duff.
>
> On 22 Apr, 2009, at 12:41, Jim Fleischer wrote:
>
>> Question.....if I've got plenty of pedal pressure from the bleeding 
>> methods tried thus far, is the Motive pressure bleeder really  necessary? 
>> Once again, the pistons are pressing well, just not  retracting, seems to 
>> be on all four corners.....
>>
>> Just curious before I spend another $54.95.....and wait for another  few 
>> days for delivery....
>>
>> Jim
>>
>>
>> ----- Original Message ----- From: "Ian Duff" <iduff at comcast.net>
>> To: "Jim Fleischer" <jim at almgt.com>
>> Cc: "Scarlist" <s-car-list at audifans.com>
>> Sent: Wednesday, April 22, 2009 10:30 AM
>> Subject: Re: [s-cars] Front Brake calipers not releasing.....Master 
>> Cylinder?
>>
>>
>>> Don't pass go, don't collect $200, do't try to bleed VAG brakes 
>>> without a Motive bleeder http://www.motiveproducts.com/. The tried- but- 
>>> true pump-hold-bleed doesn't work so well on these cars.
>>> -Ian Duff.
>>>
>>> On 22 Apr, 2009, at 12:25, Jim Fleischer wrote:
>>>
>>>> Hi Tom,
>>>>
>>>> I've got a buddy who concocted a pressure bleeder for his 
>>>> Volvos......used
>>>> it the first time I bled them, and seemed to work okay.  It was a 
>>>> little
>>>> frustrating to mess with, so I flushed the system the old- fashioned 
>>>> way the
>>>> second and third times and seemed to get a stronger bleed.  Pedal 
>>>> feel is
>>>> like it was before the ruptured rear line put this ball into motion.
>>>>
>>>> This is my first brake job on the "S" without adult supervision,  but 
>>>> I have
>>>> done them in the past on some Fords of years past......I've   spectated 
>>>> on a
>>>> couple of Audi brake jobs before.  I'm running VW/Audi DOT 4 fluid 
>>>> through
>>>> the system, as that is what was in there before.  I've gone with  all 
>>>> oem
>>>> lines, rotors and pads for the reason that if I screwed something   up, 
>>>> it
>>>> would be pretty obvious to me, or so I thought.
>>>>
>>>> When looking at the old pads, it looks like this may have been a 
>>>> problem for
>>>> some time, as there is some uneven wear in the pads on the right 
>>>> rear, and
>>>> front left.  There also had been some "hot spots" on the rotors 
>>>> (that's what
>>>> the machinist said.)  Maybe the MC had been acting up for awhile,   and 
>>>> until
>>>> I replaced everything, it was somewhat unnoticeable.
>>>>
>>>> Brake light does come on for between 20-30 seconds before it  shuts 
>>>> off, and
>>>> has done that for about a year.  That has not changed throughout  this
>>>> process.
>>>>
>>>> Thanks for the help everyone!
>>>>
>>>> Best regards,
>>>>
>>>> Jim Fleischer
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Tom Green" <trgreen at comcast.net>
>>>> To: "Scarlist" <s-car-list at audifans.com>; "Jim Fleischer" 
>>>> <jim at almgt.com
>>>> >
>>>> Sent: Wednesday, April 22, 2009 6:15 AM
>>>> Subject: Re: [s-cars] Front Brake calipers not releasing.....Master
>>>> Cylinder?
>>>>
>>>>
>>>>>>
>>>>> All symptoms point to the master cylinder, Jim.
>>>>>
>>>>> You did not mention how you were bleeding the brakes.  Do you  have a
>>>>> power bleeder now?  If so, what kind?
>>>>>
>>>>> I believe you are experienced at brake work, and fully  understand 
>>>>> this
>>>>> question,but have you verified that the correct fluid is in each 
>>>>> system?
>>>>>
>>>>> Tom
>>>>>
>>>>>> -----Original Message-----
>>>>>> Date: Tue, 21 Apr 2009 19:45:27 -0600
>>>>>> From: "Jim Fleischer" <jim at almgt.com>
>>>>>> Subject: Re: [s-cars] Front Brake calipers not  releasing.....Master
>>>>>> Cylinder?
>>>>>> To: "Lee Levitt" <lee at wheelman.com>
>>>>>> Cc: s-car-list at audifans.com
>>>>>> Message-ID: <DFA9E02A978D4817AE02080AE70742A0 at 421Capitol>
>>>>>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>>>>>> reply-type=response
>>>>>>
>>>>>> The part #'s matched up front and rear, and the shape of the  pads 
>>>>>> were
>>>>>> identical to what I took off.......they fit fine until the first 
>>>>>> brake
>>>>>> pedal
>>>>>> test.....then they just stay there.  I took the car out again  after
>>>>>> bleeding
>>>>>> the whole system, twice......after a very short drive, I  checked 
>>>>>> all the
>>>>>> corners and it looks like I've got issues at all four calipers,   as 
>>>>>> all
>>>>>> the
>>>>>> rotors were hot......the fronts are just making more noise than  the
>>>>>> rears.....hopefully the master cylinder will do the trick.
>>>>>>
>>>>>> thanks for the tip, though....
>>>>>>
>>>>>> Jim
>>>>>
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> S-CAR-List mailing list
>>>> S-CAR-List at audifans.com
>>>> http://audifans.com/mailman/listinfo/s-car-list
>>>
>>>
>>
>
>
> 