Changing brake pads made the grinding noise worse?

DarkRider23 · 03-29-2010, 11:43 PM

A while back my car's brakes started making a loud grinding noise. I brought it to the dealership and they said nothing was wrong. 2 weeks later, I got fed up with the noise, brought it back to the dealer and they said that my rear brake pads were still above specs and shouldn't have been changed, but they did it anyway.

I drive my car home and the grinding noise doesn't happen at all during the drive. I drive my car to and from school for the next 4 days without any noise coming from my brakes. I'm happy as hell that this annoying noise is finally gone.

Then, on the 5th day, the noise starts back up again. This time it's even worse. It's louder and even more high pitched this time around. Could it be the front brake pads? Any ideas here? I'll be bringing the car back to the dealer on Thursday or Friday to see what they have to say about it, but I'm really at a loss. I asked them about my front brake pads and they said that they were fine and didn't see the need to change them yet.

Bimmer This · 03-30-2010, 12:22 AM

Most of your braking is done from the front brakes. Most likely, you have brake dust buildup in your front brake pad causing the noise. Next time you are at the car wash, just pressure wash your calipers/rotors and it should go away.

bsamoul · 03-30-2010, 12:25 AM

You can also have someone stand outside and brake by them and have them listen to what wheel(s) is making noise.

JayKay335i · 03-30-2010, 12:55 AM

Use break cleaner. Although I'm not sure whether or not it would destroy the sensors. I'd ask the dealer, or see if anybody on the forum has tried.

Potty_Pants · 03-30-2010, 07:03 AM

Quote:

Originally Posted by JayKay335i

Use break cleaner. Although I'm not sure whether or not it would destroy the sensors. I'd ask the dealer, or see if anybody on the forum has tried.

careful with the brake cleaner... it will eat the paint off the rims.

ppp

DarkRider23 · 03-31-2010, 02:48 PM

Quote:

Originally Posted by Bimmer This

Most of your braking is done from the front brakes. Most likely, you have brake dust buildup in your front brake pad causing the noise. Next time you are at the car wash, just pressure wash your calipers/rotors and it should go away.

That seems to have been the problem all along. Drove through the rain yesterday (pretty heavy rain at that) and the noise has been gone all day today. I'll be more mindful and actually pressure wash the calipers and rotors more often. Thanks

.

AngelFarelli · 12-24-2019, 04:47 AM

The f30 has a thin round layer of metal that protects the inside of the rotor however when bent out of place will rub agains the rotor or wheel and produce various sounds. My front brakes had a low vibration hum sound like a big ship horn and the back used to make a scrapping sound every second for a few seconds at moderate to slow speeds.

feuer · 12-24-2019, 08:48 AM

Quote:

Originally Posted by AngelFarelli

The f30 has a thin round layer of metal that protects the inside of the rotor however when bent out of place will rub agains the rotor or wheel and produce various sounds. My front brakes had a low vibration hum sound like a big ship horn and the back used to make a scrapping sound every second for a few seconds at moderate to slow speeds.

What?

AngelFarelli · 12-25-2019, 10:40 AM

Quote:

Originally Posted by feuer

Quote:

Originally Posted by AngelFarelli

The f30 has a thin round layer of metal that protects the inside of the rotor however when bent out of place will rub agains the rotor or wheel and produce various sounds. My front brakes had a low vibration hum sound like a big ship horn and the back used to make a scrapping sound every second for a few seconds at moderate to slow speeds.

What?

That is the metal layer behind the rotor that will bend and scrape the rotor.

feuer · 12-25-2019, 01:27 PM

Quote:

Originally Posted by AngelFarelli

That is the metal layer behind the rotor that will bend and scrape the rotor.

Oh you are talking about the metal plate called dust shield. Got it. Thank you for the clarification.

AngelFarelli · 12-26-2019, 12:00 AM

Quote:

Originally Posted by feuer

Quote:

Originally Posted by AngelFarelli

That is the metal layer behind the rotor that will bend and scrape the rotor.

Oh you are talking about the metal plate called dust shield. Got it. Thank you for the clarification.

Actually I believe it to be apart of the parking break system still doing more research.

03-29-2010, 11:43 PM	#1
DarkRider23 Lieutenant 31 Rep 459 Posts Drives: 201 335i xDrive Join Date: Apr 2009 Location: New Jersey iTrader: (0)	Changing brake pads made the grinding noise worse? A while back my car's brakes started making a loud grinding noise. I brought it to the dealership and they said nothing was wrong. 2 weeks later, I got fed up with the noise, brought it back to the dealer and they said that my rear brake pads were still above specs and shouldn't have been changed, but they did it anyway. I drive my car home and the grinding noise doesn't happen at all during the drive. I drive my car to and from school for the next 4 days without any noise coming from my brakes. I'm happy as hell that this annoying noise is finally gone. Then, on the 5th day, the noise starts back up again. This time it's even worse. It's louder and even more high pitched this time around. Could it be the front brake pads? Any ideas here? I'll be bringing the car back to the dealer on Thursday or Friday to see what they have to say about it, but I'm really at a loss. I asked them about my front brake pads and they said that they were fine and didn't see the need to change them yet.
	Appreciate 0 Tweet Quote

03-30-2010, 12:22 AM	#2
Bimmer This Major General 99 Rep 6,473 Posts Drives: 2007 BMW 335i Join Date: Nov 2008 Location: Westminster iTrader: (3)	Most of your braking is done from the front brakes. Most likely, you have brake dust buildup in your front brake pad causing the noise. Next time you are at the car wash, just pressure wash your calipers/rotors and it should go away.
	Appreciate 0 Quote

03-30-2010, 12:25 AM	#3
bsamoul Major General 167 Rep 7,433 Posts Drives: E90 325i Join Date: Feb 2007 Location: Walnut Creek, California iTrader: (2)	You can also have someone stand outside and brake by them and have them listen to what wheel(s) is making noise. __________________ -Brian 2X 2006 BMW 325i [Electric Red & Mystic Blue] \| ZPP \| V1 \| Rear Fogs \| M3 Lip Spoiler \| EAS RemoteKey \| BMS Powerbox \| Projector90 Headlights w/ LED AE \| LED plate lights \| OEM Blacklines http://www.tech-shine.com
	Appreciate 0 Quote

03-30-2010, 12:55 AM	#4
JayKay335i Banned 189 Rep 5,046 Posts Drives: ///M323 DCT Join Date: Apr 2009 Location: North Dakota; its best DUHHHHHH iTrader: (1)	Use break cleaner. Although I'm not sure whether or not it would destroy the sensors. I'd ask the dealer, or see if anybody on the forum has tried.
	Appreciate 0 Quote

12-24-2019, 04:47 AM	#7
AngelFarelli Second Lieutenant 57 Rep 276 Posts Drives: BMW n52 e90 Join Date: Nov 2019 Location: California iTrader: (0)	The f30 has a thin round layer of metal that protects the inside of the rotor however when bent out of place will rub agains the rotor or wheel and produce various sounds. My front brakes had a low vibration hum sound like a big ship horn and the back used to make a scrapping sound every second for a few seconds at moderate to slow speeds.
	Appreciate 0 Quote