[djpateman]

The S calipers are pretty nice to bleed since both sides have to be done separately; bleed inside, then outside.

The rears are like the 914 calipers in that they have top and bottom bleeds typically. I always open both and drain the caliper first, then close the bottom and refill, then bleed. My reasoning is this: The brake line goes in behind the inner piston, and the bleeders are on the same side ; basically three holes all lined up. When fresh fluid comes in it generally mixes a little bit with the old fluid in the back of the inner piston, and the mixture exits out the bleed nipple. Depending on the velocity of the incoming fluid (a jet) the inner parts of the inner piston may or may not get fully flushed. Nowhere have I mentioned the outer piston simply because it is not in the loop. The only way to flush the outer piston is to drain it first. That is why almost all the calipers I rebuild have more crud in the outer piston than the inner.

I'm just finishing up a lot of ten calipers, then I'll only have 30 to go.