[s-cars] Rear Caliper Update and PN request/check

[Peter Schulz]

Dave:

The mechanism is binding because most of the original packing grease in the 
e brake cylinder bore has been washed out and there is likely corrosion on 
the e brake piston rod. UrS4.com has some guidance from Fred Munro how to 
better lubricate the mechanism.

BTW, with either a new or rebuilt caliper, the ebrake mechanism should 
function WITHOUT the return spring...Adding a bigger spring just addresses 
the symptom ( ebrake cam not returning to position) , not the root cause 
(lack of lubrication/corrosion in the mechanism bore).

Btw, the oem seal on the mechanism, breaks down over time (shrinks) which 
perpetuates the situation...
A good rebuild should replace the seal  and upgrade is replacing it with a 
transmission seal (similar to the crank seal) available from NAPA auto stores.
Unfortunately, since my hard drive died, I can pull up the part number.

HTH

-Peter




At 09:43 AM 1/7/2004 -0800, you wrote:
>Okay.  I am cold and wet (unheated garage) but I think (I hope) I found
>the problem.  Although the ebrake cable looks fine (nice and shiny), the
>cam was not fully back to its "disengaged" stop.  It is now.  There is
>still a slight pad drag but its a lot less.  I sprayed everything I had
>at the cable/cam area (Brake Klean, Liquid Wrench and WD40).  Hopefully
>it will work. I will find out in a few minutes when I drive (6 km) to
>work.
>
>In the mean time, I thought I should check out rebuilt calipers.  The
>number that I think I saw (through an ancient hieroglyphic rubbing
>technique) was 2 32 23 921.  Is this correct? Or am I missing a number
>or is that first 2 a 7?  (My FA is disabled).
>
>Thanks in Advance (and for the other hints last night)
>
>Dave F.
>
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