Rotor runout
Thread Starter
Burning Brakes
Joined: Dec 2013
Posts: 997
Likes: 210
From: Schaumburg IL
Rotor runout
Having an issue here with rotor runout on the front right, I have a reading of .01" on the hub itself the best I can due with the shims that I have is .01" on the rotor. I am thinking that I need to replace the hub but would like some opinions. I did tighten the hub down when I took the readings.
The front left I got to .002". I have not had any problems with lack of brakes but I have had issues with the heating up of the brakes causing the brakes to drag where you cannot push the car.
Back to work with me.
Jack
The front left I got to .002". I have not had any problems with lack of brakes but I have had issues with the heating up of the brakes causing the brakes to drag where you cannot push the car.
Back to work with me.
Jack
2026 Loser of the Year
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From: New Or-leens Loo-z-anna
By "tightening the hub down"......does that mean you tightened the lug nuts AND the bearing nut (so that all play will be eliminated)?
.....don't ask how I know this
.......I'm thinking of rotors without rivets.......
.....don't ask how I know this
.......I'm thinking of rotors without rivets.......
Last edited by doorgunner; Oct 3, 2016 at 11:02 AM.
Thread Starter
Burning Brakes
Joined: Dec 2013
Posts: 997
Likes: 210
From: Schaumburg IL
Jack.
2026 Loser of the Year
Joined: Sep 2013
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From: New Or-leens Loo-z-anna
Also......The hub itself could be "skim cut" on the face with a metal lathe to "true it".....but that might not be an option for you.
REAR rotor below with rivets removed.......
Last edited by doorgunner; Oct 3, 2016 at 11:26 AM.
Thread Starter
Burning Brakes
Joined: Dec 2013
Posts: 997
Likes: 210
From: Schaumburg IL
Jack.
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,595
Likes: 7,042
From: New Or-leens Loo-z-anna
I did index the rotor, put shims in made sure I had the shims in the right place by re-indexing/testing. Right now I think I will take the hub off and re-due the bearings and the races and see if that improved my runout if that does not I think I am looking for another hub.
Jack.
Jack.
Another lonnng shot is that a ball joint or tie-rod is worn and allowing the spindle assembly to shift un-noticed which would cause a false reading.
Thread Starter
Burning Brakes
Joined: Dec 2013
Posts: 997
Likes: 210
From: Schaumburg IL
I had time to pull the hub last night and the bearing races someone has done a job on them but I think the high spots can be taken down with a little TLC and a good grinder hopefully this will allow the races to sit against the hub and will straighten it out enough that I can minimize the rotor runout.
Jack
Jack
Thread Starter
Burning Brakes
Joined: Dec 2013
Posts: 997
Likes: 210
From: Schaumburg IL
I had time to put the hub back on last night and was able to adjust and index the rotor the best I can get right now is .006" close but I want better. Re-doing the bearings and races helped by about half so poorly seated races can cause some runout issues. Off to buy another shim and get my car back on the road before I have to put her up for the winter.
Jack.
Jack.
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Thread Starter
Burning Brakes
Joined: Dec 2013
Posts: 997
Likes: 210
From: Schaumburg IL
I replaced the lines, that was one of the first things that I did. Runout is now not great but just within spec on the passenger side all I have to do tonight is put the wheels back on and take her for a drive.
Jack
Jack