[s-cars] Rear Calipers

Fri Sep 5 12:53:24 PDT 2008

Not a bad idea.  That will get rid of that dirty fluid!

Kase

Mtgadbois at aol.com wrote:
> Gents,
>  
> What I do when the brake pistons do not want to fully retract is to  open the 
> bleeder screw.  I do this for fronts and rears.  BTW, I use  the Harbor 
> Freight tool - picked it up for $30.
>  
> Mark near Chicago
>  
> Prior messages:
> Date: Fri, 5 Sep 2008 12:57:12 +0000
> From: "Wylie Bean"  <theringmeister at triad.rr.com>
> Subject: Re: [s-cars] Rear  Calipers
> To: "W. Bean" <theringmeister at triad.rr.com>,
> s-car-list-bounces at audifans.com,     "Jack Walker"
> <jack at walkerperformancegroup.com>
> Cc: urq at audifans.com,  S-CAR-List at audifans.com
> Message-ID:
> <405872466-1220619443-cardhu_decombobulator_blackberry.rim.net-248610419- at bxe1
> 53.bisx.prod.on.blackberry>
>
> Content-Type: text/plain; charset="utf-8"
>
> Jack forgive me for  not having had the effects of my coffee kick in yet.  I 
> misread part of  your post. You said the tool broke, not the center pin of the 
> caliper. At that  point i'd definitely remove the piston and see what's going 
> on. If the boot  was/is torn and there's dirt or rust in there then it may be 
> frozen in place and  indeed be time for the giant parts heap in the sky. 
>
> Sorry for the  confusion. 
>
> Wylie Bean
> 90 cq
> 91 90q20v
> 92 UrS4
> 01  allroad
>
> -----Original Message-----
> From: "W. Bean"  <theringmeister at triad.rr.com>
>
> Date: Fri, 5 Sep 2008 8:29:24 
> To:  Jack Walker<jack at walkerperformancegroup.com>
> Cc:  <urq at audifans.com>; <S-CAR-List at audifans.com>
> Subject: Re:  [s-cars] Rear Calipers
>
>
> Jack,
> If you're using the correct type of  tool to retract the caliper piston and 
> it won't go back, then I'd suggest  removing the piston altogether and checking 
> the inner face of the caliper and  the face of the piston for rust or 
> degradation.  Somewhere I read (Bentley  maybe, or was it the insert with the caliper 
> boots?  who knows, anyway)  that if there's is either, then the caliper 
> should be replaced.  I rebuilt  my cq rear calipers last year with new boots for 
> the piston and guide pins, and  re-greased the assemblies and it was not that 
> difficult.  Removing the  piston simply means rotating it counter-clockwise such 
> that it unscrews itself  from that center shaft.  If you bent the shaft was 
> it a result of trying to  push the piston back in without turning it at the 
> same time?  The $35 brake  caliper retraction tool that Harbor Freight sells has 
> paid for itself 10 times  over.  The little pin was sheared off and eventually 
> came out of mine after  about 5 brake jobs, but that was easily fixed ($2 and 
> a small amount of  dremel/filing) and it's probably better than new now, and 
> it's been used another  5 or 6 times since.
>
> ---- Jack Walker  <jack at walkerperformancegroup.com> wrote: 
>   
>> I?m in the position of  placing the Ur S4/6 rear calipers/rotors as an
>>     
> upgrade to my 83 UrQ. I?ve  read with interest the rebuild notes published on
> one of the lists for rear  calipers, although I can?t remember exactly where
> it is right now. At what  point should I consider the calipers written off,
> as unserviceable and buy  something new or already rebuilt? Which was the
> recommendation of a shop I  took them too to have them wound back?which they
> wouldn?t do?not that I fault  them for not doing it!
>
>
>
> I don?t have any of the tools to properly  do the caliper rebuild, but am not
> opposed to getting them, a guy can always  have more tools..; ^) 
>
>
>
> But, I?ve tried to wind back the calipers  with a wind back tool and it bent
> the metal rod that?s supposed to twist the  piston as it is compressed and
> wound back into the caliper body. So I must be  doing something wrong? I?ve
> got like 4 of the rear calipers as parts to mess  around with and they all
> seem to have the same problem, so it?s got to be  me!
>
>
>
>
>
> Jack  Walker
>
> HYPERLINK
> "mailto:jack at walkerperformancegroup.com"jack at walkerperformancegroup.com
>
>
>
>
>
>
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> --
> Wylie  Bean
> TheRingmeister at triad.rr.com
> 90 cq
> 91 90q20v sport
> 92 UrS4
> 01  allroad
>
>
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