Vibration in steering wheel when braking. Warped rotors???
Thread Starter
AudiWorld Super User
Joined: Oct 2001
Posts: 3,062
Likes: 0
From: Stow, Ohio
Vibration in steering wheel when braking. Warped rotors???
I seem to be having a vibration issue when braking. At low speeds (40mph and under), the brakes behave normally with no real vibration. At faster speed, gradual braking would cause the steering wheel to shake back and forth. If I'm stronger in braking at higher speed, it doesn't seem to vibrate.
I have Stoptech brakes up front and had the rotor rings replaced last year due to heat checking. I bought the rings from RacingBrake.com and used their hardware kit to attach the ring to the aluminum Stoptech hat.
Some of the original bolts were stubborn to remove and required heating up the bolt to get it out. After replacement, I noticed a few bolts loose on the driver's side and had them tightened up (and properly torqued).
I'm wondering if the heating of the bolts for removal might have caused the aluminum hat to warp. Could it be the rotor ring(s) are warped, or could it be brake pad material on the rotor that's doing this?
I'm using Ferodo DS2500 pads with the Stoptech brakes. The rotor rings are slotted. I also have the ECS S4 rear brake upgrade kit which includes a 2 piece slotted floating rotor, but I don't think the rear brakes are an issue as I've had no vibrations in the seat when braking.
I have Stoptech brakes up front and had the rotor rings replaced last year due to heat checking. I bought the rings from RacingBrake.com and used their hardware kit to attach the ring to the aluminum Stoptech hat.
Some of the original bolts were stubborn to remove and required heating up the bolt to get it out. After replacement, I noticed a few bolts loose on the driver's side and had them tightened up (and properly torqued).
I'm wondering if the heating of the bolts for removal might have caused the aluminum hat to warp. Could it be the rotor ring(s) are warped, or could it be brake pad material on the rotor that's doing this?
I'm using Ferodo DS2500 pads with the Stoptech brakes. The rotor rings are slotted. I also have the ECS S4 rear brake upgrade kit which includes a 2 piece slotted floating rotor, but I don't think the rear brakes are an issue as I've had no vibrations in the seat when braking.
Audiworld Junior Member
Joined: Jul 2004
Posts: 678
Likes: 0
From: Sacramento
I have the same problem with my B7 S4. Some say warped rotors and others it is a build up.
Really don't know how to determine what is actually going on. There is no visable build up and the rotors only have about 8,000 miles on them. About 6-8 track days but in chcking the tempature of the rotors I never found them over 650 degrees and stock rotors should ealily handle 650.
AudiWorld Member
Joined: Jan 2008
Posts: 210
Likes: 0
From: New Haven CT
I heard if you perform the ST pad bend in it may help.
Otherwise take the rotors off and have them resurfaced.
If you can have them take the slightest amount of material off since I as well believe that pad deposits are the culprit of vibrations while braking.
cheers
Nick
Otherwise take the rotors off and have them resurfaced.
If you can have them take the slightest amount of material off since I as well believe that pad deposits are the culprit of vibrations while braking.
cheers
Nick
Thread
Thread Starter
Forum
Replies
Last Post
audidweeb
RS4 (B7 Platform) Discussion
22
Jan 22, 2009 12:50 PM
Assle
A4 (B5 Platform) Discussion
4
May 24, 2005 11:44 AM
moving violation
Audi 5000 / 200 / V8 Discussion
4
Apr 24, 2004 01:54 PM
ArandA4
A4 (B5 Platform) Discussion
5
Apr 5, 2003 10:40 AM
