[s-cars] Sticky Big Red

[Theodore Chen]

Abe,you might want to try a web search to see if you can find pictures of the pad replacement procedure.  There's a retaining bolt on top of the caliper.  Remove this and the anti-rattle clip.  Then you should be able to grab the pads with pliers and pull them out.

On Mon Jun 7th, 2010 7:58 PM PDT Abe Berman wrote:

>Removed caliper this evening.  On the inside of LF rotor the pad seems to be
>only contacting the outer edge of the rotor surface, the inner surface is
>rough with some light rust.  The pads seem to be jammed into the caliper
>though and I couldn't easily figure out how to remove them.  I did not do
>the conversion, so I am unfamiliar with this caliper design and the online
>descriptions indicate that the pads should be easily removed.  Is there a
>trick that I am missing?
>
>On Mon, Jun 7, 2010 at 8:01 PM, Tom Green <trgreen at comcast.net> wrote:
>
>> Abe, I mean clean the brake dust and crud off the caliper so you can see
>> the condition of the dust boots.  You probably are going to have to remove
>> the pads but not the caliper.  If one is torn it is probably best to bite
>> the bullet then and have them rebuilt.  Your inspection of the lines, etc is
>> time well spent.
>>
>> That sounds like a shop you use regularly that checked the balance.
>>  Knowing the problem, I am sure they would also look for a leaky piston or
>> other possible causes.  The shop I use will tolerate my inspection while
>> they have the wheels off.
>>
>> I use Mintex red box and Hawk HPS for street pads.
>>
>> Tom '95 S6
>>          '95.5 S6 avant
>> Knoxville, TN
>>
>> On Jun 7, 2010, at 3:27 PM, Abe Berman wrote:
>>
>> Tom,
>>
>> Thanks for the tips.  I did not closely inspect them, no, my mechanic
>> actually did the balancing as I do not have access to a balancer.
>>
>> What constitutes an "exterior cleanup"?  I usually wipe down the caliper
>> exteriors and the surrounding with a rag and simple green when I change
>> winter and summer wheels.  I clean the rotors with brake cleaner should any
>> simple green get on them.  I do not however remove the caliper or rotor.  I
>> do inspect the lines and suspension components whilst down there.
>>
>> Any recommendations on pads and fluid from the group?  As far as
>> performance needs, this is a spirited daily driver only, no track use.
>>
>> Thanks,
>>
>> a
>>
>>
>> On Mon, Jun 7, 2010 at 2:31 PM, Tom Green <trgreen at comcast.net> wrote:
>>
>>>
>>>
>>>
>>> Did you have a chance to inspect the brakes while the wheels were being
>>> checked for
>>> balance?  You don't mention any intervening maintenance since the brakes
>>> were
>>> installed 5 yrs/30K miles ago.  It's certainly time for a fluid flush,
>>> exterior cleanup and
>>> inspection, and perhaps a pad change.  If they are one piece rotors,
>>> turning them to
>>> provide a new and true bedding surface for new pads is a good idea.  If
>>> the pads are
>>> worn 1/2 or more, the reposition of the piston may be all that is needed
>>> along with the
>>> new fluid, but if the pistons are out that far you might be advised to
>>> check behind the
>>> dust boot to make sure the pistons are clean and add a little plasti-lube
>>> to insure they
>>> retract smoothly when resetting for new pads.
>>>
>>> Then clean and inspect the brakes at least yearly and flush the fluid at
>>> least every two
>>> years.
>>>
>>>  Tom '95 S6
>>>          '95.5 S6 avant
>>> Knoxville, TN
>>>
>>>  -----Original Message-----
>>> Date: Mon, 7 Jun 2010 10:16:42 -0700
>>> From: Martin Kozaczek <mkozaczek at gmail.com>
>>> Subject: Re: [s-cars] Sticky Big Red
>>> To: Abe Berman <yellowcuda at gmail.com>
>>> Cc: s-car list <s-car-list at audifans.com>
>>>   Message-ID:
>>> <AANLkTilHqJpT3apSTxEfyJ0goZq8B9FwRMlw0kiQ_1Dp at mail.gmail.com>
>>> Content-Type: text/plain; charset=ISO-8859-1
>>>
>>> I've read that some have had luck with taking the caliper off (easier to
>>> work this way) removing the seal or boot whatever it's called, then
>>> cleaning
>>> out the piston bore with liberal amounts o WD40 or equivalent, clearing
>>> out
>>> with compressed air and reassembling.
>>>
>>> My calipers were new so I didn't bother, just sent them back.
>>>
>>> On Mon, Jun 7, 2010 at 10:01 AM, Abe Berman <yellowcuda at gmail.com> wrote:
>>>
>>> Thanks for sharing Martin.
>>>
>>>
>>> Hmm, guess I should check the archives.  I am hoping (read: praying) that
>>> I
>>>
>>> don't need to replace the caliper(s).
>>>
>>>
>>> On Mon, Jun 7, 2010 at 12:40 PM, Martin Kozaczek <mkozaczek at gmail.com
>>> >wrote:
>>>
>>>
>>>  This seems to be a common problem with the older style two piece
>>>
>>>  928GTS/993 big reds or blacks.  I had a brand new set that did it right
>>> from
>>>
>>>  day 1.
>>>
>>>
>>>  I tried everything and could not get it to go away, so I returned them
>>> and
>>>
>>>  temporarily replaced them with 996 C4 calipers while I wait for my 996TT
>>> big
>>>
>>>  reds.  Problem went away immediately when I put the 996 calipers on.
>>>
>>>
>>>   On Mon, Jun 7, 2010 at 9:27 AM, Abe Berman <yellowcuda at gmail.com>wrote:
>>>
>>>
>>>  Patient - 95.5 Avant mit Porsche "Big Red" front calipers
>>>
>>>
>>>  Has anyone had problems with sticky Porsche calipers?
>>>
>>>
>>>  I have been experiencing incidences of shuddering on the highway and
>>> feel
>>>
>>>  it
>>>
>>>  slightly (but intermittently) around town at lower speeds.  Checked
>>>
>>>  balance
>>>
>>>  on all 4 wheels and its fine.  Tires are new and have no external
>>>
>>>  defects.
>>>
>>>
>>>  I experienced this to a HEAVY degree whilst on the highway on Friday and
>>>
>>>  immediately pulled off at an exit.  Front Left wheel had serious heat
>>>
>>>  radiating off of it and a strong brake smell, all others were normal.
>>>
>>>
>>>  I did some reading and it seems like the correct procedure would be to
>>>
>>>  clean
>>>
>>>  and lubricate slide pins and flush brake fluid/bleed brakes to eliminate
>>>
>>>  possible gunk/moisture in lines.
>>>
>>>
>>>  The Big Reds were installed approximately 5 years/30k miles ago.
>>>
>>>
>>>  Thanks in advance for any thoughts.
>>>
>>>
>>>  Abe
>>>
>>>  Burlington, VT
>>>
>>>
>>>
>>
>>
>>
>_______________________________________________
>S-CAR-List mailing list
>http://audifans.com/mailman/listinfo/s-car-list
>http://www.audifans.com/kb/List_information