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

[Theodore Chen]

No, if you have a solid pedal then you got what you needed.  I don't have a pressure bleeder, either, and have not had trouble flushing my brakes on any car.

By the way, if you are trying to find out why the pistons aren't retracting, loosen the fittings at the master cylinder.  That will tell you whether the problem lies at the master cylinder or downstream.  Opening the bleeder at the caliper only tells you whether the problem is hydraulic or due to caliper pistons sticking.

-Teddy




________________________________
From: Jim Fleischer <jim at almgt.com>
To: Ian Duff <iduff at comcast.net>
Cc: Scarlist <s-car-list at audifans.com>
Sent: Wednesday, April 22, 2009 9:41:27 AM
Subject: Re: [s-cars] Front Brake calipers not releasing.....Master Cylinder?

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
>>>
>>>
>>>
>>
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>
>
> 

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