Go Back   ADVrider > Bikes > GSpot > GS Boxers
User Name
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Thread Tools Search this Thread Display Modes
Old 08-07-2014, 06:42 AM   #1
Tim Graichen OP
Joined: Mar 2013
Oddometer: 32
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


Tim Graichen screwed with this post 08-15-2014 at 05:03 AM
Tim Graichen is offline   Reply With Quote
Old 08-07-2014, 07:18 AM   #2
Trade Parts for Beer
Reaver's Avatar
Joined: Aug 2008
Location: Tronna area, Ontario Canada
Oddometer: 2,326
Click 34 Brakes #11
Now with only 1 Triple Black.
Reaver is online now   Reply With Quote
Old 08-07-2014, 08:01 AM   #3
Tim Graichen OP
Joined: Mar 2013
Oddometer: 32

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.

Tim Graichen is offline   Reply With Quote
Old 08-07-2014, 02:19 PM   #4
drdata's Avatar
Joined: Nov 2004
Location: Los Angeles
Oddometer: 2,124
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.

Have router, will split lanes for food.
drdata is offline   Reply With Quote
Old 08-15-2014, 05:00 AM   #5
Tim Graichen OP
Joined: Mar 2013
Oddometer: 32
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.

Tim Graichen is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Times are GMT -7.   It's 07:58 AM.

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014