C-clamp to the calipers

[Kneale Brownson]

You need to push in on the rear caliper's piston somewhat while also 
turning it clockwise to reseat it in the cylinder.  Some of the pistons 
have a hex head depression to turn with a key or (if you can find one large 
enough) a socket with a hex bit in it.  Some rear pistons have notches on 
the circumference of the piston into which a tool can fit for doing the 
turning while pushing.  In the absence of either tool, you can turn the 
piston with a pair of water pump pliers (aka Channel Locks) gripping the 
edge of the piston.  It's important when using the pliers to be really 
careful to avoid tearing the rubber seal between the piston and the 
cylinder opening.


At 01:30 PM 08/10/2001 -0400, Beatty, Robert wrote:

>Mike,
>
>You didnt say if your car is quattro or not and im not sure if that makes a
>difference, but on the 200q the rear calipers have a 8mm (i think) allen or
>hex key in the center of the piston.  You have to turn the piston while
>compressing it.  Its a major pain in the ass sometimes.  I would suggest
>looking at the pistons on your rear calipers.  If there is a slot or a hole
>for a hex key in the center then turn them as you compress them.  The
>turning mechinism is to allow the car to adjust the emergency brakes for
>wear.
>
>Rob
>
>-----Original Message-----
>From: Michael Williams [mailto:MPWilli at accusort.com]
>Sent: Friday, August 10, 2001 1:18 PM
>To: quattro at audifans.com
>Subject: C-clamp to the calipers
>
>
>Hi guys
>When I was working on my front calipers awhile back I was trying to get the
>piston back into the caliper. A guy at an auto shop said to use a C-clamp to
>push it back in. Phil Payne said that was fine for the fronts but not for
>the rear calipers. What's the reason for that? The car in question is an
>89-100. Sorry Phil, I can't find your email to send this to you directly.
>Thanks
>Mike Williams