BY FAR, the most annoying noise ever.

MTTH · 09-28-2015, 05:16 PM

So a couple of weeks ago, I went over a huge dip in the road at speed which probably had my car airborne an inch or so. Now there's a metal on metal type of noise coming from the rear passenger side. Everything looks intact from a visual inspection.

I can tell the sound is radiating as the wheel rotates. I just made a video which I'm going to upload once I figure out how. Keep in mind that my rear brakes already needed to be done as the rotors are warped.

Any ideas what this sound could be? Car is a 2011 E90 328i xDrive with 89xxx miles.

UPDATE: Link to video

UPDATE 10/2/15: Dealer says rear caliper is sticking & needs to be replaced along with the rotors and pads. Picture of rust build up on wheel from I guess the grinding below.

dmatre · 09-28-2015, 09:28 PM

Look for a stone between the rotor and the heat shield. That's the most likely cause.

b1mmr · 09-29-2015, 02:31 AM

Idk.. This strange whistle on the highest two settings for my hvac is pretty annoying too

but good luck man let us know if it's a rock.. Hopefully not a bearing or anything of the sort

MTTH · 09-29-2015, 09:19 AM

Quote:

Originally Posted by Ian_N54

Idk.. This strange whistle on the highest two settings for my hvac is pretty annoying too

but good luck man let us know if it's a rock.. Hopefully not a bearing or anything of the sort

At least you're the only one who hears the noise

MTTH · 09-29-2015, 09:20 AM

Video has been uploaded, Keep in mind that in person the noise is WAY louder and more obnoxious. I'll try to capture another video and upload it later.

critical05 · 09-29-2015, 10:32 AM

It does sound like metal to metal grinding.

To me it sounds similar when you have very little friction material left on the brake pads and the steel backing material is grinding against the rotor.

Are your rear brake pad sensors triggered?

Could also be the brake pad retaining spring, maybe it popped free and is rubbing against the hub. Best bet is to remove the wheel and spin it by hand to see where the noise is coming from.

jgoens · 09-29-2015, 10:49 AM

Quote:

Originally Posted by critical05

It does sound like metal to metal grinding.

To me it sounds similar when you have very little friction material left on the brake pads and the steel backing material is grinding against the rotor.

Are your rear brake pad sensors triggered?

Could also be the brake pad retaining spring, maybe it popped free and is rubbing against the hub. Best bet is to remove the wheel and spin it by hand to see where the noise is coming from.

+1
Yeah I would jack up each wheel(unless you know the one) and give it a spin and you should be able to pinpoint the location.

kaybat · 09-29-2015, 11:30 AM

backing plate bent rubbing against rotor?

MTTH · 09-29-2015, 12:54 PM

Quote:

Originally Posted by jgoens

+1
Yeah I would jack up each wheel(unless you know the one) and give it a spin and you should be able to pinpoint the location.

Pretty sure its the rear passenger wheel.

Quote:

Originally Posted by kaybat

backing plate bent rubbing against rotor?

How could I tell?

sirdaft1 · 09-29-2015, 03:35 PM

Anyone else think of this from the thread title?

kaigoss69 · 09-29-2015, 05:01 PM

Sorry OP, hope you get it figured out and get rid of the noise. With respect to being the most annoying noise in the world, I would have to disagree.

MTTH · 09-29-2015, 06:07 PM

Lol maybe the most embarrassing noise coming from a nice car.

kaigoss69 · 09-29-2015, 06:11 PM

Quote:

Originally Posted by sirdaft1

Anyone else think of this from the thread title?

LOL beat me to it!

JeM9 · 09-29-2015, 06:14 PM

Do you run your AC a lot? Did it start happening while your AC was running? Could be the AC Compressor.

MTTH · 09-29-2015, 06:18 PM

Quote:

Originally Posted by critical05

It does sound like metal to metal grinding.

To me it sounds similar when you have very little friction material left on the brake pads and the steel backing material is grinding against the rotor.

Are your rear brake pad sensors triggered?

Could also be the brake pad retaining spring, maybe it popped free and is rubbing against the hub. Best bet is to remove the wheel and spin it by hand to see where the noise is coming from.

But for this to mysteriously happen right after hitting a dip in the road can't be coincidental.

MTTH · 09-29-2015, 06:20 PM

Quote:

Originally Posted by JeM9

Do you run your AC a lot? Did it start happening while your AC was running? Could be the AC Compressor.

Don't run my AC too often, and it was off when this occurred. Although I am having problems HVAC system. It's only hot at 84 degrees (Max), anything less and it blows cold/semi-warm air.

pnastyFL · 09-29-2015, 07:34 PM

I feel your pain, my car is squealing right now, think it might be a pulley. but its so embarrassing driving around in a nice bmw that sounds like a three time handed down 94 buick.

drewnel22 · 09-29-2015, 07:52 PM

Jack up the rear and take the wheel off. I think you need to take a closer look. Sounds like the brake dust shield hitting the rotor or something similar.

Dark_Knight_335 · 09-29-2015, 07:56 PM

Quote:

Originally Posted by dmatre

Look for a stone between the rotor and the heat shield. That's the most likely cause.

This is exactly what it is- I've had this shit happen to me twice. Once it was so loud I was passing alongside a NJ Transit bus and thought for sure it was his shitty brakes...but when it continued as he passed me I was like fuuuuck.

Damn cars are notorious for picking shit up in their rotor shields for some godforsaken reason.

MTTH · 09-29-2015, 08:52 PM

Quote:

Originally Posted by heavychevy69

I feel your pain, my car is squealing right now, think it might be a pulley. but its so embarrassing driving around in a nice bmw that sounds like a three time handed down 94 buick.

Does it happen when in park but revving? If so, yeah it's probably the serpentine pulley. Happened to me in February. That was embarrassing too. Change all belts, pulleys, and tensioners while you're at it.

pnastyFL · 09-29-2015, 09:08 PM

Quote:

Originally Posted by TreyTwoEight

Does it happen when in park but revving? If so, yeah it's probably the serpentine pulley. Happened to me in February. That was embarrassing too. Change all belts, pulleys, and tensioners while you're at it.

as soon as i touch the gas it stops, as soon as it settles back to idle it starts again... even at speed if i let off the gas and coast it will start doing it. strange

MTTH · 09-29-2015, 09:16 PM

Quote:

Originally Posted by heavychevy69

Quote:

Originally Posted by TreyTwoEight

Does it happen when in park but revving? If so, yeah it's probably the serpentine pulley. Happened to me in February. That was embarrassing too. Change all belts, pulleys, and tensioners while you're at it.

as soon as i touch the gas it stops, as soon as it settles back to idle it starts again... even at speed if i let off the gas and coast it will start doing it. strange

It varies, it's a pulley most likely. How many miles on the car?

09-28-2015, 05:16 PM	#1
MTTH Captain 235 Rep 738 Posts Drives: '11 328xi \|'18 440xi GranCoupe Join Date: Sep 2014 Location: Staten Island, NYC iTrader: (0) Garage List [0.00]	BY FAR, the most annoying noise ever. So a couple of weeks ago, I went over a huge dip in the road at speed which probably had my car airborne an inch or so. Now there's a metal on metal type of noise coming from the rear passenger side. Everything looks intact from a visual inspection. I can tell the sound is radiating as the wheel rotates. I just made a video which I'm going to upload once I figure out how. Keep in mind that my rear brakes already needed to be done as the rotors are warped. Any ideas what this sound could be? Car is a 2011 E90 328i xDrive with 89xxx miles. UPDATE: Link to video UPDATE 10/2/15: Dealer says rear caliper is sticking & needs to be replaced along with the rotors and pads. Picture of rust build up on wheel from I guess the grinding below. Attached Images Last edited by MTTH; 10-02-2015 at 03:53 PM..
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09-28-2015, 09:28 PM	#2
dmatre Captain 775 Rep 744 Posts Drives: 2011 328i Sedan Join Date: Apr 2011 Location: The Carolinas iTrader: (0)	Look for a stone between the rotor and the heat shield. That's the most likely cause.
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09-29-2015, 02:31 AM	#3
b1mmr Major 323 Rep 891 Posts Drives: 2008 335XI E90 Join Date: Jun 2015 Location: Ohio iTrader: (0)	Idk.. This strange whistle on the highest two settings for my hvac is pretty annoying too but good luck man let us know if it's a rock.. Hopefully not a bearing or anything of the sort __________________ Formerly Ian_N54 - @b1mmr
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09-29-2015, 09:20 AM	#5
MTTH Captain 235 Rep 738 Posts Drives: '11 328xi \|'18 440xi GranCoupe Join Date: Sep 2014 Location: Staten Island, NYC iTrader: (0) Garage List [0.00]	Video has been uploaded, Keep in mind that in person the noise is WAY louder and more obnoxious. I'll try to capture another video and upload it later.
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09-29-2015, 10:32 AM	#6
critical05 First Lieutenant 36 Rep 311 Posts Drives: g80 m3, 6 speed Join Date: May 2012 Location: IA iTrader: (0)	It does sound like metal to metal grinding. To me it sounds similar when you have very little friction material left on the brake pads and the steel backing material is grinding against the rotor. Are your rear brake pad sensors triggered? Could also be the brake pad retaining spring, maybe it popped free and is rubbing against the hub. Best bet is to remove the wheel and spin it by hand to see where the noise is coming from. Last edited by critical05; 09-29-2015 at 10:44 AM..
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09-29-2015, 11:30 AM	#8
kaybat First Lieutenant 129 Rep 355 Posts Drives: '06 Z4MR, '14 Cayman S Join Date: Aug 2013 Location: Ormond Beach,Fl iTrader: (1) Garage List '06 Z4M [0.00]	backing plate bent rubbing against rotor? __________________ Ken B.(BMWCCA/PCA/ZSCCA/SCCA)
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09-29-2015, 03:35 PM	#10
sirdaft1 Brigadier General 2290 Rep 3,359 Posts Drives: F85 X5M Join Date: Feb 2013 Location: Chicago West Burbs iTrader: (9) Garage List 2016 BMW X5M [9.00] 2012 BMW X5 35i (SOLD) [9.67] 1989 BMW 325i Track ... [10.00] 2007 E90 WTCC Wideb ... [8.50]	Anyone else think of this from the thread title?
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09-29-2015, 05:01 PM	#11
kaigoss69 Brigadier General 306 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	Sorry OP, hope you get it figured out and get rid of the noise. With respect to being the most annoying noise in the world, I would have to disagree. __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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09-29-2015, 06:07 PM	#12
MTTH Captain 235 Rep 738 Posts Drives: '11 328xi \|'18 440xi GranCoupe Join Date: Sep 2014 Location: Staten Island, NYC iTrader: (0) Garage List [0.00]	Lol maybe the most embarrassing noise coming from a nice car. __________________ https://www.instagram.com/mtth.f36/
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09-29-2015, 06:14 PM	#14
JeM9 Major 141 Rep 1,001 Posts Drives: R.I.P. 11 328i AT Join Date: Aug 2014 Location: Vista, CA iTrader: (0)	Do you run your AC a lot? Did it start happening while your AC was running? Could be the AC Compressor.
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09-29-2015, 07:34 PM	#17
pnastyFL Second Lieutenant 43 Rep 269 Posts Drives: .. Join Date: Dec 2013 Location: SRQ-ORLANDO iTrader: (2)	I feel your pain, my car is squealing right now, think it might be a pulley. but its so embarrassing driving around in a nice bmw that sounds like a three time handed down 94 buick.
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09-29-2015, 07:52 PM	#18
drewnel22 Captain 140 Rep 989 Posts Drives: 2016 Subaru WRX Join Date: Jul 2012 Location: Roanoke, Va iTrader: (10)	Jack up the rear and take the wheel off. I think you need to take a closer look. Sounds like the brake dust shield hitting the rotor or something similar.
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