Brake Squeal

Geodoc · 05-22-2010, 12:43 PM

Hi All, I have an annoying

squeal from my back brake on braking (naturally!). Normal? Any suggestions of how to get rid of it? Dosen't happen on hard braking only on softer braking. Car SDrive35i.

Thanks!

Geo

teagueAMX · 05-22-2010, 04:16 PM

If it something minor more than likely it's some rust or similar on the rotor that will go away with use.

Otherwise, BMW have to remove the pads/rotors and replace them.

.

Geodoc · 05-23-2010, 05:00 AM

Quote:

Originally Posted by teagueAMX

If it something minor more than likely it's some rust or similar on the rotor that will go away with use.

Otherwise, BMW have to remove the pads/or rotors and replace them.

.

Thanks teagueAMX

mrboon · 05-23-2010, 11:53 AM

I had the same issue, just break really hard a few times. Should go away.

ChuckB · 05-23-2010, 02:05 PM

Quote:

Originally Posted by godius

I had the same issue, just break really hard a few times. Should go away.

+1

Memphis1 · 05-23-2010, 05:59 PM

Quote:

Originally Posted by godius

I had the same issue, just break really hard a few times. Should go away.

+1

you gotta remember everything needs to be broken in. tires, brakes, exhaust, engine, clutch (if manual tranny).

Geodoc · 05-24-2010, 05:41 AM

Thanks for all the advice, much appreciated

cdeslandes · 05-24-2010, 04:30 PM

Here's a procedure I've learned, and used, to break in new brakes (on a new car and after any brake job)

Find a road with little to no traffic, and proceed with caution
From 40 mph, apply maximum braking until you're down to 10 mph
Repeat from 50 mph down to 10 mph
Repeat from 60 mph down to 10
Repeat again from 70 then 80 mph

Never come to a complete stop during the procedure to avoid heat sinking and warping the hot rotors.

This procedure sits the pads to the rotors and should help avoid noise or warped rotors later on.

T89 · 05-24-2010, 06:21 PM

Quote:

Originally Posted by cdeslandes

Here's a procedure I've learned, and used, to break in new brakes (on a new car and after any brake job)

Find a road with little to no traffic, and proceed with caution
From 40 mph, apply maximum braking until you're down to 10 mph
Repeat from 50 mph down to 10 mph
Repeat from 60 mph down to 10
Repeat again from 70 then 80 mph

Never come to a complete stop during the procedure to avoid heat sinking and warping the hot rotors.

This procedure sits the pads to the rotors and should help avoid noise or warped rotors later on.

That's what I did when I got the car. No squeals what so ever and feels great.

T

jparnes1 · 05-24-2010, 09:59 PM

Quote:

Originally Posted by cdeslandes

Here's a procedure I've learned, and used, to break in new brakes (on a new car and after any brake job)

Find a road with little to no traffic, and proceed with caution
From 40 mph, apply maximum braking until you're down to 10 mph
Repeat from 50 mph down to 10 mph
Repeat from 60 mph down to 10
Repeat again from 70 then 80 mph

Never come to a complete stop during the procedure to avoid heat sinking and warping the hot rotors.

This procedure sits the pads to the rotors and should help avoid noise or warped rotors later on.

That's basically Brembo's break in procedure. Read more at http://www.zeckhausen.com/bedding_in_brakes.htm

Vintage · 05-24-2010, 10:37 PM

thanks for the really helpful thread - I will try this soon

cdeslandes · 05-25-2010, 08:31 AM

Quote:

Originally Posted by jparnes1

That's basically Brembo's break in procedure. Read more at http://www.zeckhausen.com/bedding_in_brakes.htm

Yeah, I forgot where I first heard of it, but variations on that theme are found all over.

Geodoc · 05-26-2010, 05:40 AM

Really great advice here - thanks to all for taking the time to help

mrboon · 06-24-2010, 07:21 AM

My break squeal is back, and scared the living shit out of me today.

My right rear break has been making a bit of noise for a while now, but today on the highway at about 130km/h I braked a little bit.... then the right rear break sounded like it got stuck. I hard squeal noise appeared for about 15 seconds, luckily it went away after. Gonna bring my car in for a checkup today, dont want that to happen again.

mcbeee · 06-24-2010, 09:46 AM

Check for any kind of small rock or debris that can cause a squeal, otherwise get it in for a check...

( the posted sequence for breaking in the brakes is great

but I save time by just doing 120mph down to 30mph ....just kidding folks

, my car is "run in" just fine.)

Silver-Bolt · 06-24-2010, 01:28 PM

New pads are very easy to over heat and creat a glaze on the surface. If the above break in procedure does not work and there is no debris (rocks) stuck in the caliper you may need to pull the pads. Pull the pads and sand off the layer of glaze and also add a coat of anti-squeal to the back side of the backing plate. Re-install and follow the bedding procedure.

05-22-2010, 12:43 PM	#1
Geodoc New Member 3 Rep 13 Posts Drives: Z4 SDrive35i Join Date: May 2010 Location: Ireland iTrader: (0)	Brake Squeal Hi All, I have an annoying squeal from my back brake on braking (naturally!). Normal? Any suggestions of how to get rid of it? Dosen't happen on hard braking only on softer braking. Car SDrive35i. Thanks! Geo
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05-22-2010, 04:16 PM	#2
teagueAMX Colonel 62 Rep 2,087 Posts Drives: Some are road worthy Join Date: Apr 2009 Location: So Cal, USA iTrader: (0)	If it something minor more than likely it's some rust or similar on the rotor that will go away with use. Otherwise, BMW have to remove the pads/rotors and replace them. . __________________ "Political correctness is a doctrine fostered by a delusional liberal minority and rabidly promoted by an unscrupulous mainstream media which holds forth the proposition that it is entirely possible to pick up a turd by the clean end".-- Unknown Last edited by teagueAMX; 05-23-2010 at 06:56 PM..
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05-23-2010, 11:53 AM	#4
mrboon Lieutenant 76 Rep 561 Posts Drives: Speeeed Join Date: Oct 2009 Location: *** iTrader: (0)	I had the same issue, just break really hard a few times. Should go away.
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05-24-2010, 05:41 AM	#7
Geodoc New Member 3 Rep 13 Posts Drives: Z4 SDrive35i Join Date: May 2010 Location: Ireland iTrader: (0)	Thanks for all the advice, much appreciated
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05-24-2010, 04:30 PM	#8
cdeslandes Captain 27 Rep 676 Posts Drives: 2010 Z4 s35i Join Date: Apr 2010 Location: Connecticut iTrader: (0) Garage List 2014 Jeep Wrangler ... [0.00] 2013 Volvo XC90 [0.00] 2010 BMW Z4 sDrive35i [8.67]	Here's a procedure I've learned, and used, to break in new brakes (on a new car and after any brake job) Find a road with little to no traffic, and proceed with caution From 40 mph, apply maximum braking until you're down to 10 mph Repeat from 50 mph down to 10 mph Repeat from 60 mph down to 10 Repeat again from 70 then 80 mph Never come to a complete stop during the procedure to avoid heat sinking and warping the hot rotors. This procedure sits the pads to the rotors and should help avoid noise or warped rotors later on. __________________ 2010 BMW Z4 s35i 2014 Jeep Wrangler Rubicon 2013 Volvo XC90
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05-24-2010, 10:37 PM	#11
Vintage Colonel 381 Rep 2,588 Posts Drives: BMW G80 (MT), 718 Spyder Join Date: Aug 2009 Location: Austin, Texas iTrader: (0)	thanks for the really helpful thread - I will try this soon
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05-26-2010, 05:40 AM	#13
Geodoc New Member 3 Rep 13 Posts Drives: Z4 SDrive35i Join Date: May 2010 Location: Ireland iTrader: (0)	Really great advice here - thanks to all for taking the time to help
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06-24-2010, 07:21 AM	#14
mrboon Lieutenant 76 Rep 561 Posts Drives: Speeeed Join Date: Oct 2009 Location: *** iTrader: (0)	My break squeal is back, and scared the living shit out of me today. My right rear break has been making a bit of noise for a while now, but today on the highway at about 130km/h I braked a little bit.... then the right rear break sounded like it got stuck. I hard squeal noise appeared for about 15 seconds, luckily it went away after. Gonna bring my car in for a checkup today, dont want that to happen again.
	Appreciate 0 Quote

06-24-2010, 09:46 AM	#15
mcbeee Lieutenant 5 Rep 446 Posts Drives: '09 Z4 s35i & '03 Z4 3.0i Join Date: Nov 2009 Location: Calgary iTrader: (0) Garage List 2003 Z4 3.0i [5.00] 2001 Z3 3.0i [0.00] 2009 Z4 s35i [7.00]	Check for any kind of small rock or debris that can cause a squeal, otherwise get it in for a check... ( the posted sequence for breaking in the brakes is great but I save time by just doing 120mph down to 30mph ....just kidding folks , my car is "run in" just fine.) __________________ Member ZSCCA 2009 Z4 s35i with Dinan Stage II software, Sport and Exec packages, 19" 296 rims , a stubby and mud flaps '03 Z4 3.0i Sterling Grey (Hers) '01 Z3 3.0i Sapphire Black, M sport package (Mine)
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06-24-2010, 01:28 PM	#16
Silver-Bolt Captain 27 Rep 805 Posts Drives: 2011 Z4 35is Melbourne Red Join Date: Jun 2010 Location: Portland, OR iTrader: (0) Garage List 2011 Z4 35is [9.00]	New pads are very easy to over heat and creat a glaze on the surface. If the above break in procedure does not work and there is no debris (rocks) stuck in the caliper you may need to pull the pads. Pull the pads and sand off the layer of glaze and also add a coat of anti-squeal to the back side of the backing plate. Re-install and follow the bedding procedure.
	Appreciate 0 Quote