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short life for rear brake pads

 
Old 10-07-2007, 05:22 PM
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jgrosjean
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Default short life for rear brake pads

Since several threads mention rear brakes, here is mine.
Mine don't last very long-about 5000 street miles. The front ones last much longer. On my old 911E the opposite was true. Does anyone know why and how to fix it?
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Old 10-07-2007, 05:58 PM
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sounds like sticking on the plates - do they squeak?
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Old 10-07-2007, 06:21 PM
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No squeaks. I was thinking about getting harder ones, but this wear seems excessive.
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Old 10-07-2007, 07:08 PM
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Rocket Rob
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Your rear brake pads should last a very long time on the street. Is the wear even on both sides of the car? And is the wear even (inside vs outside) on each caliper? My thinking is that you may have a partially frozen piston in one of the calipers.

By the way, when was the last time you bled your brake fluid?
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Old 10-07-2007, 07:39 PM
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All the pads wear about the same. Maybe all the pistons are stuck. Maybe I should take the pistons out and clean everything. I bled the system this spring. You have given me hope that this can be fixed.
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Old 10-07-2007, 07:46 PM
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Is your car an early style with the 2 piston rear calipers? If so I had the same problem with them wearing out quickly.
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Old 10-07-2007, 08:55 PM
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It is 1991. Am not sure. I will check it tomorrow. Thanks for the help.
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Old 10-08-2007, 08:33 AM
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I have 2 piston calipers. Took the pads out this morning to check. The pistons are not stuck and pushed back easily. Maybe harder pads is the solution.
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Old 10-08-2007, 09:41 AM
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What pads are you running? Are they the same front and back?

Another thought, what type of rotors do you have? Are they stock ones? Slots or drilled rotors will have accelerated pad wear.
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Old 10-08-2007, 10:36 AM
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All genuine Porsche parts. Pads came from a dealer. Any recommendations for harder ones?
I thought I had a lot of miles on mine-148k but you have more. Got my engine rebuilt at 130k.
Manual steering rack and no AC.
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Old 10-08-2007, 12:02 PM
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I had switched away from the factory pads early on (circa '94) because they wore too quickly. I tried a number of brands. My favorite pads for the street are Ferodos but they won't work for you since they aren't available for the two piston rear calipers. You can do a search on Rennlist for recommendations of "best" pads for the street. I just purchased a set of Pagid Dark Blue pads for my "new" C-2 which has the two piston rear calipers. If you upgrade to four piston rears, you have more options for pad choices.
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Old 10-08-2007, 01:28 PM
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You are right. I finally figured out that the 2 piston calipers were used only in 1990,1991 and nobody makes aftermarket replacement pads. New calipers would cost a lot more than a lot of brake pads. Has anyone measured them and found a substitute without the notch for the pad wear sensors?
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Old 10-08-2007, 02:46 PM
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Pagid makes pads for the 90-91 C2's. I just purchased some from EBS Racing. Even though they don't list the rear pads on their web page, they are available in the street compound. My C-2 is still disassembled in my garage so I can't comment on if I like them yet or not.

http://www.ebsracing.com/content.wws...id-brakes.html

No affiliation.
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Old 10-10-2007, 08:20 AM
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Are your rear pads fully wearing out or is it just that your brake wear indicator comes on at 5,000 miles? If your rotors are getting old, the lip can wear through the plastic of the indicator giving a 'false' wear indication.

If you want to try the pagid blues suggested by Rob the pagid code for the 2 pot rears is T1157 but you would be advised to change the fronts aswell (pagid code T0377) so that your retain the front/rear braking balance.
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