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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 10-16-2013, 09:29 AM   #1
Cayne23
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Damn it!!!!!

Ok well I just did a new wheel bearing, front drivers side, and new front brakes. I bedded the brakes, several times 60 to 10 mph. When I hit 80 mph and apply the brakes lightly, my steering wheel shakes. Didnt do it b4 the brake change. I wonder if my rotor is warped cuz my inner pad on drivers front was worn almost to nothing, but I attribute that to the bad wheel bearing. Maybe the pads arent broken in yet. Alot of initial bite. When I did the brakes I cleaned everything really well and greased up the guide pins too. I put anti-seize where the pads sit in the caliper. Calipers were moving smoothly by hand. Dont know what it could b, but its really pissing me off

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Old 10-16-2013, 09:36 AM   #2
Cayne23
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Re: Damn it!!!!!

Oh, also forgot to add, my left front tire, which is the problem I think, has slight uneven tire wear. Also I attribute to the bad bearing. The outer is worn more than anything else. Ma6be I'll take it all apart and redo it. This is bs. I've done brake jobs on all sorts of cars b4. At least 50 times and never have had any problems

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Old 10-16-2013, 09:42 AM   #3
DSilk56
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It's hard to diagnose issues without looking at the car, but the items I would look at would be:

(1) Front rotors. Are they warped? Are they worn to the point where there is a lip on the outer edge?

(2) FCABs. Are they worn? This is less likely, since you would feel the pull when you apply the brakes even at 60 mph, but it's worth checking.

(3) Ball joints.

(4) Calipers. Is it possible that the caliper on one side or the other is temporarily freezing?

Good luck.
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Old 10-16-2013, 09:56 AM   #4
Cayne23
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Re: Damn it!!!!!

FCAB'S looked ok, no play in them. Balljoints looked good too. Maybe could be the rotor on left, but didnt do it b4 new brakes. But if the bearing and inner pad wore, I wonder if the whole tire was tilting. My initial guess is maybe a stick caliper. It only shakes if I hit the brakes at 80mph, not at 75mph. I have also been hearing an oscillating sound coming from the left front to since new pads

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Old 10-16-2013, 11:22 AM   #5
stolidog
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Based on what you said Im assuming you re-used the old rotors without having them machined?

Also, to add to the list you can have your wheels rebalanced. yes, this should have presented itself before the brake job... but you never know.
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Old 10-16-2013, 11:56 AM   #6
Cayne23
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Re: Damn it!!!!!

Yes these r the old rotors. My new pads r only the second set on the rotors. Rotors should b good for 2 sets of pads

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Old 10-16-2013, 12:02 PM   #7
taylor192
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Wheel shaking under braking is rotors or pads. Bearing or tires would shake all the time.

I bet your rotors were thin, then when breaking in the new pads you overheated the rotors and warped them. Measure your rotors before deciding to do only pads.
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Old 10-16-2013, 01:19 PM   #8
Cayne23
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Re: Damn it!!!!!

But even at 75mph, I cant brake hard and there isnt any pull or steering wheel shake. I bet that bad bearing I had just messed up everything. The inner pad, that was worn down almost to nothing, outer had 1/8 inch left, probably compensated for the warped rotor thus I didnt feel it b4. Now there is a new pad with a ton of meat on it. Its showing me how warped the rotor is. Idk, just a thought

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Old 10-16-2013, 01:31 PM   #9
choxor
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You should have had the rotors turned. Did you even measure them.
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Old 10-16-2013, 01:49 PM   #10
alirz
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Its normal that it starts shaking when you hit 80 mph. You only need to go 8 mph faster and that should solve the issue.

Sorry please dont bash. I just had to say that.
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Old 10-16-2013, 01:52 PM   #11
DSilk56
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Sooo... You're saying that the issue is his flux capacitor? I think only DeLoreans came with one of those.
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Old 10-16-2013, 02:14 PM   #12
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Sooo... You're saying that the issue is his flux capacitor? I think only DeLoreans came with one of those.
Exactly!
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Old 10-16-2013, 02:17 PM   #13
Cayne23
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Re: Damn it!!!!!

Looking at the service records I see that front rotors only, were installed at some indy shop back on sept 23 2011. Not oem part numbers either. Were 122 each. Yup probably some cheap ass rotors that a bad wheel bearing definitely did bend. Oh and btw, looking through my rim at my brake pads, I see that only the front half of pads have made contact with the rotor. On both wheels. Pagid red pads. Maybe they arent bedded fully yet

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Old 10-16-2013, 02:22 PM   #14
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Quote:
Originally Posted by Cayne23 View Post
Looking at the service records I see that front rotors only, were installed at some indy shop back on sept 23 2011. Not oem part numbers either. Were 122 each. Yup probably some cheap ass rotors that a bad wheel bearing definitely did bend. Oh and btw, looking through my rim at my brake pads, I see that only the front half of pads have made contact with the rotor. On both wheels. Pagid red pads. Maybe they arent bedded fully yet

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Sounds like something is not installed properly or your rotors are very warped.

I also subscribe to the 2 sets of pads per set of rotors theory... yet you still have to measure the rotors to ensure they are thick enough for the next set of pads.
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Old 10-16-2013, 02:41 PM   #15
Cayne23
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Re: Damn it!!!!!

Well I jacked the car up. Turn the wheel. Hear a slight rub sound and then at one spot hear a louder, harder rub for a second

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Old 10-16-2013, 06:17 PM   #16
Cayne23
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Re: Damn it!!!!!

Jacked up both sides of the car ans spun the wheels. Right side, slight rubbing all the way around. Left side, slight rubbing all the way around, then at one spot for about 1/5 around, it rubs harder. Thats the oscillating I hear. Both rotors need to be changed. Bav auto has their brand, coated like the oem's, for 69.95 each. Gonna order them. B-day is in a month. Its sad but thats how im gonna have to play it towards my wife cuz we just keep spending money on this car. Lol

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Old 10-18-2013, 11:19 AM   #17
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Originally Posted by Cayne23 View Post
Ok well I just did a new wheel bearing, front drivers side, and new front brakes. I bedded the brakes, several times 60 to 10 mph. When I hit 80 mph and apply the brakes lightly, my steering wheel shakes. Didnt do it b4 the brake change. I wonder if my rotor is warped cuz my inner pad on drivers front was worn almost to nothing, but I attribute that to the bad wheel bearing. Maybe the pads arent broken in yet. Alot of initial bite. When I did the brakes I cleaned everything really well and greased up the guide pins too. I put anti-seize where the pads sit in the caliper. Calipers were moving smoothly by hand. Dont know what it could b, but its really pissing me off

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You're not suppose to grease the guide pin/bolt.

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Old 10-18-2013, 01:09 PM   #18
Cayne23
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Re: Damn it!!!!!

Yea thats what I read, after some thourough digging, per the bmw tech book in brake changes. Im going to take every

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Old 10-18-2013, 01:10 PM   #19
Cayne23
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Re: Damn it!!!!!

Everything apart tomorrow and redo

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