3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.
Sponsored by:

Uneven wear on rotors

Thread Tools
 
Search this Thread
 
Old Dec 13, 2014 | 02:49 AM
  #1  
octanepwr's Avatar
Thread Starter
Full Member
 
Joined: Apr 2014
Posts: 64
Likes: 0
From: New Zealand
Uneven wear on rotors

Hi all

I just got my rotors skimmed (off vehicle) and fitted new pads front (DS2500) and rear (EBS yellow).
I cleaned the faces of the brake, rotor and wheels so there was no rust etc so they can seat perfectly. I lubed the slider pins with caliper grease (as well as between pads and shims etc). Also torqued lug nuts properly.

I did my best to bed them in a few days ago - a casual drive, then 15 reasonably strong operations within reasonably quick succession, then cool for 5 mins.
The surfaces looked to have even wear after that.
Just went for another decent drive with harder braking, can see both front rotors now show more wear (or at least appear a different colour) on the inner of the rotor as attached.

Seems like I have done all the right things so any ideas?
Wasn't like this with the previous pads/before rotors skimmed.

My only other consideration is that maybe the front pads haven't actually fully bedded yet....

Cheers
Attached Thumbnails Uneven wear on rotors-20141213_212032.jpg  
Reply
Old Dec 13, 2014 | 08:20 AM
  #2  
DaleClark's Avatar
RX-7 Bad Ass
Tenured Member: 20 Years
Liked
Loved
Community Favorite
iTrader: (56)
 
Joined: Jan 2002
Posts: 15,622
Likes: 2,725
From: Pensacola, FL
Either the shop that turned the rotors didn't get them totally flat or your pad isn't totally flat. That's the only explanation I can think of for that.

Eventually the pads will match the profile of the rotor, but that kind of sucks.

Looks like you had larger brakes at one point, the brake dust shield is for a larger rotor?

Dale
Reply
Old Dec 14, 2014 | 05:15 PM
  #3  
IRPerformance's Avatar
Sponsor
iTrader: (41)
 
Joined: Apr 2003
Posts: 11,347
Likes: 321
From: NJ
That or a piston is sticking. See if it evens out.
Reply
Old Dec 15, 2014 | 09:48 AM
  #4  
tt7hvn's Avatar
Rotary Enthusiast
Tenured Member 10 Years
iTrader: (5)
 
Joined: Nov 2005
Posts: 1,319
Likes: 1
From: New Bern, NC
Or you're torqueing your wheels using a impact wrench....
Reply
Old Dec 15, 2014 | 11:58 AM
  #5  
fendamonky's Avatar
F'n Newbie...
Tenured Member: 15 Years
Liked
Loved
Community Favorite
iTrader: (6)
 
Joined: Sep 2006
Posts: 3,942
Likes: 323
From: Nokesville, Va
Originally Posted by tt7hvn
Or you're torqueing your wheels using a impact wrench....
How/why would that effect rotor wear?
Reply
Old Dec 15, 2014 | 12:21 PM
  #6  
IRPerformance's Avatar
Sponsor
iTrader: (41)
 
Joined: Apr 2003
Posts: 11,347
Likes: 321
From: NJ
Uneven/overtorqued lug nuts can cause the rotors to sit unevenly. A sticking piston in a multi-piston caliper will cause the brake pad to apply uneven pressure to the rotor.
Reply
Old Dec 15, 2014 | 12:44 PM
  #7  
LargeOrangeFont's Avatar
Fistful of steel
iTrader: (7)
 
Joined: Nov 2008
Posts: 2,202
Likes: 27
From: OC, So Cal
If you have just driven it twice don't worry about it yet. Get a few more miles on it and it will probably even out. If not you have a sticking piston.
Reply
Old Dec 15, 2014 | 01:38 PM
  #8  
octanepwr's Avatar
Thread Starter
Full Member
 
Joined: Apr 2014
Posts: 64
Likes: 0
From: New Zealand
Haha I used a torque wrench - thought I made that obvious. After more sedate drive they are all even so I think it might just be heat related. Will see with time...
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ZacMan
Build Threads
4
Sep 19, 2015 09:20 PM
Ian_D
New Member RX-7 Technical
6
Sep 6, 2015 10:38 PM




All times are GMT -5. The time now is 03:42 PM.