[s-cars] Sticky Big Red
Jerry Scott
jerryscott at wispertel.net
Tue Jun 8 11:16:38 PDT 2010
I have found that some non OE, after-market pad do not have the correct
dimensions for the steel back plate. This can cause the pad to jam in the
caliper. I think that you will find that the OE Porsche pads will not have
this problem.
Jerry
----- Original Message -----
From: "Theodore Chen" <tedebearp at yahoo.com>
To: "Abe Berman" <yellowcuda at gmail.com>
Cc: "Keith Franchetti" <skidfranc at gmail.com>; <trgreen at comcast.net>;
<s-car-list at audifans.com>
Sent: Tuesday, June 08, 2010 12:05 PM
Subject: Re: [s-cars] Sticky Big Red
> Sorry, I meant pin, not bolt.
>
> Are you talking about 993 turbo calipers or 996 turbo calipers (people
> seem to call both of them "Big Red")? The 993 turbo calipers don't have
> the pin, just a huge clip.
>
> For the 996 turbo calipers:
> http://www.heumann.com/bigred/index.html
>
> In any event, I've never had trouble changing the pads - just pull them
> straight out.
>
> From what you described, it sounds like the pads are not sliding freely in
> the caliper. Check the pad guides carefully to make sure they are smooth
> and clean, and check the pads where they contact the guides.
>
>
>
>
> ________________________________
> From: Abe Berman <yellowcuda at gmail.com>
> To: Theodore Chen <tedebearp at yahoo.com>
> Cc: trgreen at comcast.net; s-car-list at audifans.com; Keith Franchetti
> <skidfranc at gmail.com>
> Sent: Tue, June 8, 2010 10:43:36 AM
> Subject: Re: [s-cars] Sticky Big Red
>
>
> Teddy,
>
> This is the procedure that I found yesterday:
>
> http://p-car.com/diy/brakepads/
>
> I did not see a retaining bolt on my calipers, could that bolt be only on
> the 996 calipers?
>
> a
>
>
> On Tue, Jun 8, 2010 at 1:07 PM, Theodore Chen <tedebearp at yahoo.com> wrote:
>
> 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
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>
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>>
>>
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