BMW Garage BMW Meets Register Today's Posts




 

Post Reply
 
Thread Tools Search this Thread
      08-01-2012, 11:38 AM   #1
mclemens
Enlisted Member
mclemens's Avatar
United_States
10
Rep
43
Posts

Drives: 2011 BMW 1M
Join Date: Jan 2012
Location: USA

iTrader: (0)

Uneven brake pad wear

I changed the rear pads on my 1M today and found that the pads on the drivers side had really uneven wear. The front edge of one pad was wore much more that the front edge of the other pad. This condition was reversed on the back edge of the pads. Take a look at the photo to see the angled wear.



On the passenger side the pad wear was the same (nice and even) on both pads.

Any idea on what would cause the uneven wear?
__________________
2011 1M AW, 2011 A3 TDI, 2013 Mini JCW, 2014 F150, 2016 Focus RS on order
Appreciate 0
      08-01-2012, 12:21 PM   #2
MDORPHN
Colonel
297
Rep
2,898
Posts

Drives: AW 1M
Join Date: Oct 2010
Location: Wash, DC

iTrader: (0)

Sticking piston, possibly caused by damaged dust boot??

Neil
Appreciate 0
      08-01-2012, 03:54 PM   #3
TXmtrhed
First Lieutenant
TXmtrhed's Avatar
37
Rep
381
Posts

Drives: VO 1M
Join Date: Aug 2010
Location: Katy, TX

iTrader: (0)

Quote:
Originally Posted by MDORPHN View Post
Sticking piston, possibly caused by damaged dust boot??

Neil
I don't see how that could be the case; the outboard pad wear should not be affected by the piston - it's alignment is determined by the caliper. This kind of wear is extremely odd. Looks like the whole caliper has been cocked at an angle. Are the guides and guide bolts in good shape?
Appreciate 0
      08-01-2012, 08:29 PM   #4
Wolfpack
Private First Class
Wolfpack's Avatar
1
Rep
199
Posts

Drives: Everything in my garage
Join Date: Aug 2007
Location: Iowa

iTrader: (0)

Garage List
Really strange for a rear pad to do this. I used to have this on the fronts of my 330 before I changed to brass guide pins and got rid of the rubber. Really seems like there is way too much pressure applied and the calipers are deflecting. Just never seen it on a rear before.
__________________
Wherever you go...there you are.
Appreciate 0
      08-10-2012, 12:21 AM   #5
HP Autosport
Supreme Allied Commander
United_States
4068
Rep
55,683
Posts

Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

iTrader: (36)

The guide sleeves are rubber so under load the caliper will try to twist on you. To minimize this issue you can install caliper bushings as the cheaper route or BBK.
Appreciate 0
Post Reply

Bookmarks


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 Off



All times are GMT -5. The time now is 06:53 PM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST