[s-cars] Rear calipers

[Peter Schulz]

Second what Paul said, I've had new and "rebuilt" calipers fail within two years in salty New England.  In both situations the grease used within the caliper ebrake mechanism was almost non existent.

I've had really good experience by completely dis assembling the caliper and using high temp waterproof synthentic brake grease from my FLAPS, and replacing the cam seal with a NAPA transmission seal.  The toughest part of the job is removing and reinstalling the Circlip that retains the spring under the caliper piston.

Lucas rebuild instructions and an exploded view of the caliper internals can be seen here:
http://www.20v.org/brakere.htm

Mike Sylvester built a tool to retain the circlip, pictures and instructions how to repair the ebrake mechanism are here : http://www.urq20v.com/Brakes/brake_rebuild.htm

-Peter




On Dec 16, 2009, at 5:38 AM, Paul Heneghan wrote:

> -----Original Message-----
> Date: Tue, 15 Dec 2009 18:55:09 -0500
> From: Douglas Landaeta <dlandaeta at gmail.com>
> Subject: [s-cars] Rear calipers
> 
>> Does anyone rebuild calipers anymore?
>> 
>> The reason I ask is because I pushed the cylinder out one of my rear
>> calipers. (don't ask). The rubber seal didn't open or break, I just
>> pushed it all back together. Do you think it will leak now?
>> 
>> The e-brake and slides are all done with new bolts and booties.
> 
> I do - more often than I'd like to - probably about once every two years for
> the last 20 years. I've had a couple of failures (usually due to a handbrake
> mechanism rusted beyond repair), and lots of successes.
> 
> You need to get a repair kit that includes the handbrake mechanism o-ring
> and oil seal as these are the rubber bits in the worst condition in all the
> calipers I've dismantled. Lots of repair kits don't include these in which
> case you need to source them separately.
> 
> Here's a link to a wiki I wrote on my experiences:
> http://www.simoes.us/kb/Handbrake
> 
> And here's a link to a write-up on AudiWorld - lots of nice pics:
> http://forums.audiworld.com/showthread.php?t=2770104
> 
> Paul
> 1995 S6 - daily driver
> 1995 S6 Avant - awaiting investigation after t-belt failure
> 
> 
> 
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