A Veteran wrote:
> what are those thin springy inserts between the piston and the brake
> pads? What do they do? Noise? can they be left out?
>
noise (vibration)reduction. You can leave them out, but risk of noisy
brakes increases. Functionally, no difference. You can fight noise by
cleaning all surfaces that have a potential for minute _meta_l-to-_meta_l
movement, then coating them with high temp copper paste. Keep paste off
of friction linings and rotor. NEVER lube slide pins with it, use only
brake grease for slide pins. (Some calipers don't have them).
Use brake grease or brake fluid to lube piston seals too.

Non-brake parts approved grease may cause rubber parts to swell or
deteriorate - bad, bad, bad.


Jan