[Porschedude]

911pcars,

The items you are speaking of are the vibration dampers that have a self-adhesive surface on the pad side, and a multi-fingered spring that slips into the caliper piston.

Robert,
I converted my ’91 C2 rear brakes to four piston calipers. The set of caliper were used that I rebuild and they had been cannibalized. The screws that hold the spring plates on were internal allen wrench button head screws. They are real soft and are lock-tite'd in pretty well. I had to deal with some stripped out screws and drilled the body of screw out and used an “easy-out” to remove the screws. If you are determined to clean behind the spring plates, be prepared to drill out the screws and have replacements on hand. Use an allen wrench that is sharp cornered, rather when one with radius or rounded edge. The newer the better. When I drilled mine out I had to use an angled head drill motor “aircraft type pneumatic”. It was the only way to get into the cavity.

How hard were the old ones to come out? Compare the old pads with the new ones. The old ones came out; the new ones must be oversize. If you sand down the width of the backing plate to make it fit, make sure that the surface is square and not tapered. Also make sure that the surface is smooth, to prevent it from hanging up so that it will float in position.

Good luck, Keith