Very tight fitting brake pads ?

[Bergo]

Just finished rebuilding a pair of 911 S calipers. Mounted them up to the struts, 20mm ate rotors. Tried test fitting the new brake pads and they fit super tight, can't wiggle them in by hand, would probably be able to tap them in, am I doing g something wrong? From my reading all of these parts should work together. Should I them in and drive a bit to wear hem down?

[DRACO A5OG]

Where are the pistons, in all the way or a bit out?

Compare the new pads with the old pads and rotors.

Pics would help

[Bergo]

Old calipers were M calipers and different struts. New S calipers came with some pads that were very worn. Pistons are all the way in, fresh rebuild on the calipers, pushed all the way in using a bar clamp to be sure they were all the way in.

[DRACO A5OG]

Where is it binding? At the piston to rotor or caliper inner sides?

[Bergo]

between piston and rotor, pads fit in the calipers fine

[porsche930dude]

you got the wrong pads. There are thicker and thinner ones. I recall someone having the same problem. I couldnt tell you which ones are right

[DRACO A5OG]

Which pads are you trying to use? Do they have the anti-rattle shims or are the pads hitting the pad backing?

[Bergo]

thanks, I think you're right, must have got the wrong pads. should have bought them from the dealer, I grabbed a set with my last rock auto order, probably too thick.

I've heard of guys resurfacing pads to remove any rust if they've been sitting by running them along the side of a chop saw, any chance I could quickly wear off a couple MM of pad doing that? cost isn't as much of a concern as time it takes to get new pads, nobody local stocks them here.

Edit: also, yes, to do have the anti vibration backing on them, a thin piece of plastic glued to the back side that interfaces with the piston

[Bergo]

One more question, it appears I received the wrong retaining pins with my rebuild kit. Part number received was 911-351-951-00, however the pins I removed (old and rusty) looked like those found in kit 911-352-951-00 (which, by description should be for rear calipers)

[DRACO A5OG]

I guess you can carefully shave it down equally on all four pads but do not use sand paper, the granules could get embedded in the the pads and kill your new rotors.

Plastic shims, really? I hope they are high heat resistant.

Regarding the pins, does your existing calipers use the Pin with stay clips or like the Carrera's:

I would just clean up the old ones and use them as long as they are no too badly corroded. Also would open the retainers a bit to make a tight fit into the calipers.

[reddogmotrsprts]

Gah, I really hate the idea of using a saw to clearance your pads, but so you know, they should measure 13mm. If you really do have a plastic shim on the back of the pad, I'd start by getting rid of that.