Re: 86 4kcsq rear brakes.

[Frank de Kat <fdekat@sentex.net>]

At 06:02 PM 23/07/99 -0400, you wrote:

>Well, I finally heard the grinding noise meaning the end of my rear brakes. 
> I disassembled the brakes and discovered only one bad pad, and a stuck 
>guide pin.  I turned the rotors, and fixed the guide pins.  Now the 
>problem:  I was anticipating cutting a Sealy cube in half (already had one 
>from previous vehicles) but saw a worn out hole in the center of the caiper 
>piston.  I remembered from a post a couple of days ago that a 12 mm inside 
>hex socket was required.  So I picked one up when I went to get the brake 
>pads.  It seems like it wants to fit, but just turns inside the hole 
>without spinning the piston.  

I suspect that Audi 'optimistically' figured the piston would stay forever
in the clean and shiny shape they are in the shop manuals...
Then reality hits! 
Either someone has buggered the 12mm hole, or it's full of dirt, or failing
that, it's still to stiff to turn the piston. 

I just used vise grips ("Gasp" says the readers!) very carefully on the
very end of the piston. The tiny bit that sticks out past the rubber boot.
I see no problem with this (If done carefully) as that part of the piston
acts on the hydraulic seal. 
It worked for me! Your sucess may vary...

Regards,



Frank de Kat 
fdekat@sentex.net   
Dundas, Ontario, Canada

http://www.sentex.net/~fdekat
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