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Suspension & Braking Forum by BimmerWorld
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Old 09-10-2015, 05:46 PM   #1
Fivemane
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"Warped" rotor

The other day I noticed this noise coming from my drivers rear wheel, there's also I squeak louder than my exhaust from time to time that last 10 minutes and is God awful..

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Old 09-10-2015, 08:01 PM   #2
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The other day I noticed this noise coming from my drivers rear wheel, there's also I squeak louder than my exhaust from time to time that last 10 minutes and is God awful..
apologies, but not able to get anything meaningful out of the recording posted.
I'm not sure how you zeroed in on a diagnosis of warped rotor??
This is extremely rare, so I'd broaden your search parameters. What about a rubbing dust shield for starters?
How about suction cupping your camera to the fender where the noise occurs for a closer more clear recording?
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Old 09-10-2015, 08:34 PM   #3
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Someone from another bmw club said it sounded similar to when he had a warped rotor, will post another video in an hour or less
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Old 09-10-2015, 08:53 PM   #4
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Sounds kinda loud to be a rotor. When's the last time you have your ebrake looked at?
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Old 09-10-2015, 10:10 PM   #5
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Sounds kinda loud to be a rotor. When's the last time you have your ebrake looked at?

About a month and a half ago when I changed my brakes.
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Old 09-10-2015, 10:11 PM   #6
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Ignore what I say in the video if I'm wrong..

But it does sound like something is looses and rolling around, so I'm guessing bearing?
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Old 09-10-2015, 10:23 PM   #7
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Hard to tell from video. A metallic scraping sound could be a bent/damaged e-brake backing plate. Did you hit anything recently? A "warped" rotor can be felt in the pedal. Have you attempted to gently apply the ebrake (carefully lift the e-brake handle while holding in the release button) on a closed road to see if it becomes worse?
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Old 09-10-2015, 10:32 PM   #8
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If you just did a brake job recently, rule is first place to look is back in to see if you left anything rubbing. Like a brake line?
Take that wheel off and take a good look around.
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Old 09-11-2015, 07:51 AM   #9
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Inspect the brakes and see what's going on. It's kinda hard to diagnose from this video.
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Old 09-11-2015, 10:53 PM   #10
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Removed whole brake caliper and checked for anything the could have been rubbing or anything in the pads and I wasn't able to find anything. Rotated the hub and I can definitely hear a ball noise.
Now I was trying to changed the bearing myself but got a regular 36mm and NOT 12 point so it'll have to wait until tomorrow. I really don't want to take a Denali to a college campus and leave it parked for hours in Dallas, so is it safe to drive with the bearing bad for 30 mins straight then 30 mins back home?
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Old 09-11-2015, 11:59 PM   #11
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Haven't you been driving this all around lately anyway?

Well, probably is the best answer we can give you. You know it can be driven lots before fail, and you also know that a bad bearing will not take you another 10K miles. You lie somewhere in between.
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Old 09-12-2015, 08:40 AM   #12
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Haven't you been driving this all around lately anyway?

Well, probably is the best answer we can give you. You know it can be driven lots before fail, and you also know that a bad bearing will not take you another 10K miles. You lie somewhere in between.

No I haven't been driving it since Thursday (it is now Saturday)
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Old 09-12-2015, 11:40 AM   #13
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Gonna be some degree of risk involved in this. Your call whether you want to chance it.
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