rear brakes.. is this normal?

tjnptel1 · 08-06-2009, 02:43 PM

I just had my rear brakes replaced by the dealer and now it seems like the brakes don't cover the entire disc like it should. This is after driving in the rain for 60 mins.. you can see the part where the brake pads cover and is covered with rust.

SpmnE9zero · 08-06-2009, 02:45 PM

No def not normal! I have never seen that before.

NiVeDh · 08-06-2009, 02:46 PM

Weird, take it back to the dealer.

SpmnE9zero · 08-06-2009, 02:48 PM

Looks like wrong pads, make sure they replace your rotors now, you are gonna have a hella nice wear line in those! If you do not replace rotors they will wear pads wrong, gl.

tjnptel1 · 08-06-2009, 02:50 PM

Quote:

Originally Posted by SpmnE9zero

Looks like wrong pads, make sure they replace your rotors now, you are gonna have a hella nice wear line in those! If you do not replace rotors they will wear pads wrong, gl.

f**King dealer!

SpmnE9zero · 08-06-2009, 02:51 PM

Quote:

Originally Posted by tjnptel1

f**King dealer!

Not a mechanic, just what it looks like to me.

The HACK · 08-06-2009, 02:58 PM

Before you jump to conclusions, I've seen wear like this on new pads installed on used rotors.

By the way, it's practically IMPOSSIBLE for the dealer to install the wrong pad. Most of the pads BMW use have rather unique backing plate and there's practically NO WAY to install a wrong set of pads since the backing plates won't fit. For example there's no way I can install, say, an E46 323Ci rear pad on an E92 328i front brakes. Just not possible. And if there happen to be some cross model compatibility, like E46 330i front brakes and E46 M3 front brakes, the pad backing plate would be the same and hence the amount of pad sweep area would be similar as well.

jackassroomie · 08-06-2009, 03:54 PM

I thought BMW always changes rotors and pads together? I'd definitely bring it back and have the dealer take a look at it.

MalM3 · 08-06-2009, 03:57 PM

pads are sat in wonky.

This can happen if the discs have a altered profile due to uneven wear. But that looks just like other sets ive seen poorly fitted.

The pads are not seated correctly, and are burning in at an angle

I335 · 08-06-2009, 07:15 PM

Motorcycle pads...

diablo2112 · 08-06-2009, 08:27 PM

Fairly normal. The pads have to bed-in and adapt the shape of the old rotor. Look closely at your rotor, you'll see it's more worn toward the inside edge. You can also have your rotors turned if you need to help this.

Borsig · 08-06-2009, 09:59 PM

rotors should have been turned or replaced. Youre not getting proper stopping contact.

BK · 08-07-2009, 09:58 AM

Quote:

Originally Posted by I335

Motorcycle pads...

socaldz · 08-07-2009, 11:32 AM

Is it the same on both the sides???

MalM3 · 08-07-2009, 11:39 AM

probably not,

Ive seen a Z4 with the exact same disc pattern, and after a change of pads, it was gone.

Trust me, the pads are in wrong

The HACK · 08-07-2009, 12:00 PM

Quote:

Originally Posted by diablo2112

Fairly normal. The pads have to bed-in and adapt the shape of the old rotor. Look closely at your rotor, you'll see it's more worn toward the inside edge. You can also have your rotors turned if you need to help this.

Quote:

Originally Posted by Borsig

rotors should have been turned or replaced. Youre not getting proper stopping contact.

You CAN NOT turn these vented BMW rotors. There isn't enough material to have it be "turned" and still be above minimum operating spec.

tjnptel1 · 08-08-2009, 07:48 AM

Quote:

Originally Posted by mukkuz

Is it the same on both the sides???

yes.

Spool · 08-08-2009, 07:57 AM

Maxi pads

BimmerRat · 08-08-2009, 08:06 AM

Wow. that doesnt look right.

diablo2112 · 08-08-2009, 10:31 AM

Quote:

Originally Posted by The HACK

You CAN NOT turn these vented BMW rotors. There isn't enough material to have it be "turned" and still be above minimum operating spec.

Perhaps this is what the dealers and/or BMW say, but I've been turning rotors on cars for 29 years, including track cars, and honestly, this is more a function of conservative margins + a way to sell more parts.

The consequence of a too-thin rotor is warpage if overheated. If it does warp - and that's a big IF - then you would compromise the brake system and stopping performance. And if it does warp, you'll know it pretty quickly (pulsing through brakes), and then you just change the rotor which you'd have done anyway.

I've turned the rotors on my BMW 335 and Mercedes SL500 and they've been fine. No warpage at all. The dealers may not turn the rotor, but almost any independent brake shop will.

Peej · 08-08-2009, 11:05 AM

Quote:

Originally Posted by Spool

Maxi pads

muhahahaha

08-06-2009, 02:43 PM	#1
tjnptel1 Cunning Linguist 147 Rep 2,219 Posts Drives: 335i Join Date: Apr 2007 Location: Norfolk, VA iTrader: (0) Garage List 2007 335i [0.00]	rear brakes.. is this normal? I just had my rear brakes replaced by the dealer and now it seems like the brakes don't cover the entire disc like it should. This is after driving in the rain for 60 mins.. you can see the part where the brake pads cover and is covered with rust. __________________ Bottles are for babies, Real men get blown.
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08-06-2009, 02:45 PM	#2
SpmnE9zero DENY THE WORLD THAT SURROUNDS YOU 505 Rep 35,580 Posts Drives: JB 33ZERO Join Date: Nov 2008 Location: City of Champions iTrader: (14) Garage List 2006 330xi [0.00]	No def not normal! I have never seen that before. __________________ Eurocharged V5 \| ROW's / CC Delete \| K&N's \| H&R Springs \| Single Fin G.B. Grill \| Mode Carbon Diffuser \| JBSpeed CF Spoiler \| Arkym Style CF Splitter \| CF Mirror Caps \| 5% Tints \| 12mm Spacers \|
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08-06-2009, 02:46 PM	#3
NiVeDh Major General 422 Rep 8,003 Posts Drives: '08 E90 335i, '99 E36 M3 Join Date: Apr 2009 Location: Houston, TX & Atlanta, GA iTrader: (132) Garage List 2008 BMW 335i Sedan [8.66]	Weird, take it back to the dealer.
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08-06-2009, 02:48 PM	#4
SpmnE9zero DENY THE WORLD THAT SURROUNDS YOU 505 Rep 35,580 Posts Drives: JB 33ZERO Join Date: Nov 2008 Location: City of Champions iTrader: (14) Garage List 2006 330xi [0.00]	Looks like wrong pads, make sure they replace your rotors now, you are gonna have a hella nice wear line in those! If you do not replace rotors they will wear pads wrong, gl. __________________ Eurocharged V5 \| ROW's / CC Delete \| K&N's \| H&R Springs \| Single Fin G.B. Grill \| Mode Carbon Diffuser \| JBSpeed CF Spoiler \| Arkym Style CF Splitter \| CF Mirror Caps \| 5% Tints \| 12mm Spacers \|
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08-06-2009, 02:58 PM	#7
The HACK Midlife Crises Racing Silent but Deadly Class 1821 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	Before you jump to conclusions, I've seen wear like this on new pads installed on used rotors. By the way, it's practically IMPOSSIBLE for the dealer to install the wrong pad. Most of the pads BMW use have rather unique backing plate and there's practically NO WAY to install a wrong set of pads since the backing plates won't fit. For example there's no way I can install, say, an E46 323Ci rear pad on an E92 328i front brakes. Just not possible. And if there happen to be some cross model compatibility, like E46 330i front brakes and E46 M3 front brakes, the pad backing plate would be the same and hence the amount of pad sweep area would be similar as well.
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08-06-2009, 03:54 PM	#8
jackassroomie Private 3 Rep 70 Posts Drives: 09 E90 335i AW Manual Join Date: Jul 2006 Location: Driving around iTrader: (0)	I thought BMW always changes rotors and pads together? I'd definitely bring it back and have the dealer take a look at it. __________________ Currently Driving: E90 335i Coming From: E39 2003 540i Sport
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08-06-2009, 03:57 PM	#9
MalM3 4 pot warrior 37 Rep 1,307 Posts Drives: E90 318I Join Date: Apr 2009 Location: DENMARK iTrader: (1) Garage List 2006 e90 [10.00]	pads are sat in wonky. This can happen if the discs have a altered profile due to uneven wear. But that looks just like other sets ive seen poorly fitted. The pads are not seated correctly, and are burning in at an angle __________________ Been there, done that, wanna do it again
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08-06-2009, 07:15 PM	#10
I335 Brigadier General 123 Rep 4,249 Posts Drives: '08 335i Coupe Join Date: Jan 2008 Location: New England iTrader: (11)	Motorcycle pads...
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08-06-2009, 08:27 PM	#11
diablo2112 2024 M440i GC (G26) 278 Rep 511 Posts Drives: 2024 M440i Gran Coupe Join Date: Dec 2006 Location: USA iTrader: (3)	Fairly normal. The pads have to bed-in and adapt the shape of the old rotor. Look closely at your rotor, you'll see it's more worn toward the inside edge. You can also have your rotors turned if you need to help this.
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08-06-2009, 09:59 PM	#12
Borsig Captain 52 Rep 883 Posts Drives: '09 335i ///M-Sport Join Date: Dec 2008 Location: NC iTrader: (3)	rotors should have been turned or replaced. Youre not getting proper stopping contact.
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08-07-2009, 11:32 AM	#14
socaldz Private First Class 7 Rep 170 Posts Drives: SOLD: 2007 E90 335i Join Date: Apr 2009 Location: SoCal iTrader: (3)	Is it the same on both the sides???
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08-07-2009, 11:39 AM	#15
MalM3 4 pot warrior 37 Rep 1,307 Posts Drives: E90 318I Join Date: Apr 2009 Location: DENMARK iTrader: (1) Garage List 2006 e90 [10.00]	probably not, Ive seen a Z4 with the exact same disc pattern, and after a change of pads, it was gone. Trust me, the pads are in wrong __________________ Been there, done that, wanna do it again
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08-08-2009, 07:57 AM	#18
Spool ****** 558 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	Maxi pads __________________ MKIV 6spd 1000hp Club
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08-08-2009, 08:06 AM	#19
BimmerRat Second Lieutenant 3 Rep 207 Posts Drives: 2007 335i Coupe Join Date: Sep 2007 Location: Beverly Hills, CA iTrader: (0)	Wow. that doesnt look right. __________________ 2007 335i Coupe Jet Black / Black Leather / Aluminum / Steptronic w. Paddles / Premium / Sport / CA / Navigation / Satellite
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