[s-cars] Frozen Guide Pin on Rear Caliper

[Stott Hare]

Grease/suction and the rubber weather boots are all that hold the pins in.
Once installed over a rotor, the rotor will limit the caliper motion
preventing the caliper from forcing the pins all the way out as it moves.

Working with the carrier separately, you should be able to insert/extract
the pins without effort.  Yours sound like they are well an truly corroded
in place.  Couple options, heat or soaking with lubrication.  If it's
spinning to some degree, then you can spin it and try tapping it our, or you
can try just tapping it out (think chisel on the pins shoulder).  Depending
on how hard it is to spin, you can insert a bolt into the pin until tight,
then spin the bolt with your ratchet (or air gun if you feel lucky).

Once the pin is out, clean the pin and bore, relube, and you should be ok.
I don't remember the bore diameter, but if you have an applicable size ream
or some such, you can use that to clean all the muck out.  Obviously you
don't want to be increasing the bore size or oblonging it etc.  Less violent
methods are the bore tools from various gun cleaning kits.  Replacement
pins/boots can be had from various sources apparently as well.

-Stott

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of Douglas Fifield
Sent: Thursday, August 13, 2009 3:36 PM
To: David Kase
Cc: Scarlist
Subject: Re: [s-cars] Frozen Guide Pin on Rear Caliper

What holds the guide pins in?  I can turn the "frozen" pin, but not
move it in or out.

On Thu, Aug 13, 2009 at 2:21 PM, David Kase<dkase at dorma-usa.com> wrote:
> Just BTDT
>
> 1)  Yes, but likely will not last long.  I cleaned the pin on a wire
> wheel and found it was pitted - not good.  I did put a nice coat of
> grease on it to use until I got a new one (that reminds me, I gotta get
> some pins!)  Don't forget to clean out the hole in the caliper real
> well.
>
> 2) I used penetrating oil, hammer, punch and a little heat (watch to not
> melt boot).  It takes a while but with some persistence, it will come
> off.
>
> 3) You can just replace the pins
>
> 4) ask Dave F. - dunno...
>
> Good luck,
> Kase
>
>
> -----Original Message-----
> From: s-car-list-bounces at audifans.com
> [mailto:s-car-list-bounces at audifans.com] On Behalf Of Douglas Fifield
> Sent: Thursday, August 13, 2009 3:14 PM
> To: Scarlist
> Subject: [s-cars] Frozen Guide Pin on Rear Caliper
>
> Gents -
>
> Whilst replacing pads on my 95.5 S6 Avant, I find one unworn pad and
> one down to the metal pad.  Oh oh.  Frozen guide pin.
>
> My questions are:
>
> 1) Can a frozen pin be rehabbed?
> 2) How does one extract the pin and boot?
> 3) If not fixable, where is the best place for a rebuilt carrier?
> 4) Is there a write-up somewhere that covers this?
>
> The Bentley didn't have anything on fixing frozen pins that I could
> find.
>
> TIA,
>
> Doug
>
> --
> Douglas in MN
> 95.5 Audi S//6 Avant
> 73 BMW R60/5 mit Toaster Tank
> _______________________________________________
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>



-- 
Douglas in MN
95.5 Audi S//6 Avant
73 BMW R60/5 mit Toaster Tank
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