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Old 08-07-2014, 06:42 AM   #1
Tim Graichen OP
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Leaking brake caliper 09 GS. Still need help!! :)

Hello all,

I need to admit my wrong ways here. I recently installed a new set of EBC sintered pads on the rear of my GS, as well as refreshed the brake fluid. Upon completion I had a very good pedal and all pumped up nicely. Upon riding, I realized I had nearly NO braking. I figured this to be normal, and that the new pads needed bedded in. I ran the bike around the city, using the rear brake as much as possible when stopping. After a week of this, my rear braking still was far from being good, so yesterday I did five or six heavy braking exercises in a row in an attempt to bed the pads in better. Well long story short, I noticed some fluid leakage at the caliper upon completion. I was very heavy on the pedal during these braking exercises. Was I too heavy? could I blow a piston seal? Can stock BMW calipers have new piston seals installed?

Thanks for your help
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Tim Graichen screwed with this post 08-15-2014 at 05:03 AM
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Old 08-07-2014, 07:18 AM   #2
Reaver
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Location: Tronna area, Ontario Canada
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Click 34 Brakes #11

http://www.maxbmwmotorcycles.com/fic...2&rnd=04282014
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Old 08-07-2014, 08:01 AM   #3
Tim Graichen OP
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Brakes

Thanks for the link! Does anybody have working knowledge of getting sintered brake pads to work? Proper bedding? I still have a very good pedal but VERY limited braking capacity.
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Old 08-07-2014, 02:19 PM   #4
drdata
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IMO, there should be no special need for sintered vs organic. I got sintered oem from bmw for my 05 iabs, installed, and rode.

This is not to say that any new padd should be bedded in a bit, but I would say at this point your issue is;

1. air in line
2. fluid leak
3. contaminated pads


Is the peddle hard or spongy?
Is the fluid leak resolved and brakes re-bleed?

If yes to above I would suspect the leack has contaminated the pads and you may need to replace. Wait for others before any new parts.

If the peddle is hard and things are put together right, the pads should be expanding onto the rotor when you depress, so any lack of effect would strike me as contamination. I had an old 72 blazer where the rear pads were discolored and just seemed like they had soaked in so much brake fluid I did not think I could ever wear them down to pristine material, so opted to replace.

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Old 08-15-2014, 05:00 AM   #5
Tim Graichen OP
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Leaking caliper

Hello All,

My rear caliper is leaking fluid. It is not happening at the banjo bolt. Therefore, I assume it must be at the pistons. I ordered a seal kit and replaced both seals at each piston, but the caliper is still leaking. Any thoughts are appreciated.
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