Hanging rear caliper
irautenberg at comcast.net
Sat Apr 16 13:07:21 EDT 2005
And IME would only occur with a torn boot BTST...
----- Original Message -----
From: "Bernie Benz" <b.benz at charter.net>
To: "Kneale Brownson" <kneale at coslink.net>
Cc: "200q20V mailing list" <200q20v at audifans.com>
Sent: Saturday, April 16, 2005 11:54 AM
Subject: Re: Hanging rear caliper
> Implying that the external portion of the piston, outboard of the seal,
> could corrode, right? If so, it wouldn't cause any problem until one
> to retract the piston for new pads. Any disruption in the smooth chrome
> plated piston sealing surface signifies end of life.
> > From: Kneale Brownson <kneale at coslink.net>
> > What I wrote, Bernie, was that there COULD be corrosion on the piston,
> > especially if it was extended from the cylinder quite a bit by pad wear.
> > said nothing about it falling out of the cylinder. DFIIIAB.
> > At 08:17 AM 4/16/2005 -0700, Bernie Benz wrote:
> >> Come on, get real, Kneale and Peter!
> >> Pistons can not extend far enough to drop out of the caliper seals,
> >> one forgets to install the rotor. Using the passive pad wear
> >> routinely wear my pads down to where the backing plates touch the rotor
> >> ridges. Further, there is no piston "cocking force", tendency for the
> >> piston to cock or jam within the caliper bore. They do get sludged up
> >> lack of fluid change though.
> >> Bernie
> >>> From: Kneale Brownson <kneale at coslink.net>
> >>> So, have these gone unserviced for a year and a half? Did you use
> >>> OEM, or some rebuilt stuff? You might have corrosion on guide pins or
> >>> caliper piston, especially if the pads are worn enough the piston is
> >>> extended quite a bit.
> >>> From: Peter Schulz <pcschulz at comcast.net>
> >>> Couple of thoughts...
> >>> Ebrake mechanism not fully releasing, or the pads are worn down to
> >>> depth- and the caliper cylinder is extended to the point where its
> >>> on the cylinder walls. If the Ebrake mechanism and cables are
> >>> and functioning properly, drive the brake piston completely back into
> >>> caliper.
> >>> -Peter
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