[s-cars] Hard Hitting rear brake configurization ? (NFB?)

[Peter Schulz]

Herr Baloney...

Congrats on the new lipstick on your pig lol...

There's a common misconception that the rear caliper parking brake 
issues can be resolved with new or stronger springs.Installing new or 
the Ford Granada return springs only masks the real issue -moisture 
penetrates the seal between the caliper parking brake cam rod and the 
caliper body, corroding the shaft inside the caliper.

The fact is that a new or properly rebuilt caliper doesn't actually 
need the return spring, as the internal caliper piston spring is 
actually strong enough to index the parking brake.

I've rebuilt a less than year old Audi rear caliper and it appears 
that the factory uses a low viscosity potentially non-waterproof 
grease to lubricate the shaft -

Personally, I rebuild my own rear calipers, replace the cam seal with 
a transmission oil seal from NAPA (part 6405 from Chicago Rawhide), 
and use a highly viscous waterproof synthetic brake grease, which 
seems to last much longer here in salty New England than the runny 
factory stuff..  There's an exploded view of the Lucas Girling rear 
caliper here: http://www.20v.org/brakere.htm

I also think that it's critically important to continually use the 
emergency brake,  since using it will ensure that the cam rod stays 
well lubricated.

Of course your mileage may vary, and lubricated rods is a dangerous 
phrase to use on this list.
LOL.

-Peter aka "Dr rear caliper"...



At 09:25 AM 1/7/2009 -0600, bill mahoney wrote:
>(Not a FaceBook question;)
>
>Sooo, after a long infirm, the pig is back (pics to follow sometime
>soonish.)
>New top end, turbo rebuild, new and final clutch (new dual mass with So.
>Bend clutch disc)
>New hood and front end respray (oh yes it does look awesome) and new ebrake
>cables... spark this question.
>Part of the issue with the dam rear brakes is the dam springs go weak and
>also corrode.   I am thinking (yes) that if I get some 1mm or so inserts
>from mcmaster to cut and insert between the spring coils, maybe, just maybe,
>it will remove enough friction to allow for the brakes to function for a bit
>longer time before crapping out?  Is 1mm a good thickness?
>Enquiring minds want to know.
>BTW, not that I'd want to, but if anyone is interested in purchasing this
>renewed mechanically perfect RS2+ pig for $20k, I'm all ears.  Help me get
>that GTS!
>Bill~not a gheezer, but I have been accused~M
>_______________________________________________
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-Peter Schulz
Chelmsford Ma, USA
http://www.naaclub.org/

1995.5 S6 Avant Emerald/Ecru
1995.5 S6 Avant Silver/Platinum
1991 90 20v Q Red
1991 CQ silver  (eS2 recipient)