1990 80 G54 rear emergency brake mechanism

[urq]

While I agree that changing fluid may have little to do with it, I will
disagree with the statement that the e-brake has nothing to do with the
hydraulics.  In effect the piston for the e-brake forms the back of the
brake cylinder, and is very much involved with hydraulics.  The rear piston
has a seal that can become sticky, and in effect the back side of the
caliper is a piston (without a dust cover) for which the bore it slides
through can get contaminated.  

I thought Kneale hit the nail pretty firmly on the head.  

Used to think that the fact that so many people don't use their parking
brake leads to the mechanism seizing, but even out here in temperate
California, over time the mechanism can get dodgy ...

Steve Buchholz

-----Original Message-----
From: Cody Forbes
Sent: Sunday, July 14, 2013 9:20 AM
To: Project Pat
Subject: Re: 1990 80 G54 rear emergency brake mechanism

Unfortunately changing the brake fluid gas nothing at all to do with the
parking brake. The parking brake side of the caliper is insulated from the
hydraulic side and has no brake fluid in it.

-Cody Forbes (mobile)

On Jul 14, 2013, at 12:02 PM, "Project Pat" wrote:

> 
> I have seen many VAG products from this vintage with all kinds of 
> crap(rust) in the caliper bores.
> Most people don't change brake fluid every 2-3 years, and this happens.
>