Quick update and question:
QUESTION: Has anyone else noticed that if they pump the brakes, the pedal firms up a bit as would be expected but if the pressure is maintained on the peddle it very slowly but surely drops?
It is only by mm's every few seconds and seems to stop part of the way down but is still noticeable. I can see any leaks at all and don't think I have any air in the system
. Perhaps it always did this even with the original brakes. I dunno. I would appreciate if someone could give this a try rather than go by memory.
UPDATE: I swapped over the Bosch pads for the Jurids (stamped GALFER3853FF on the metalwork) at the same time as putting on the anti-rattle ('anti-sqeel') shims last night. I also pushed a further litre of ATE SL.6 through the front calipers.
Even with only some light breaking in and 30 miles of travel, the Jurids seem to have the edge over the Bosch pads imho. Not saying Bosch were bad and they were still much better than the original setup but, until last night, I really only had one 'data point' with these new calipers.
DaveB - you asked about the Bosch and mentioned that they were getting good review but I will probably stick with the Jurids for now.
One observation to share - whether it was the new Bosch pads with the stick-on antisqueel pads from 3M or the Jurids with the Porsche anti-sqeel damping plates, getting these pads in is a tight fit! I guess the 25mm thickness of the 312 disc vs. 24mm of the Boxster disc combined with the 0.5mm or so of antisqueel backing makes things a bit snug. The sticky-back of the new shims added to the challenge. However, with a bit of a wiggle, loosening the disc-retaining bolts and a few taps with a hammer, they seated in OK and the discs were tight but moveable. I had an MOT earlier this week which noted "slight binding" on the o/s disc. However, I put some grease on the pad-retaining pegs last night to aid movement and, with the sticky-back shims, I am hoping that the pads now retract a little more when the pistons are relaxed.
The good news is that
so far the squeel has gone with the Porsche shims but I need to give it more time as it started off OK the last time (then the pistons ate through the anti-sqeel pads). It got progressively worse with time and as the brakes/discs heated up to the point of being very noticeable previously. Those 3M sticky pads just didn't do it for me!
