abnormal rotor wear - BMW 3-Series (E90 E92) Forum

Dominus · 11-09-2011, 01:53 PM

before i bought my e90 all four rotors and pads were replaced due to a bad shimmy whilst driving. now they work fine and run smooth but now the brakes squeal badly when stopping and i think im hearing them squeal during normal driving (think, because the wind is loud with the windows down and it doesnt do it at slow speeds?) i checked out all rotors today and they all look fine except the front drivers side near the top of the rotor there is an x pattern etched into it? any idea what this x pattern is from?

thanks in advance

a closer look

e90pilot · 11-09-2011, 02:40 PM

That pattern is cross hashing that helps bed the pats. It just hasn't worn away on that part of the rotor. Looks like you haven't been really using your brakes very hard.

tibra1 · 11-09-2011, 02:44 PM

You need to spray some brake quiet on the back plate of the brake pads that will eliminate squeal..they prolly didnt do that when they replaced the brakes.

Dominus · 11-10-2011, 09:05 AM

OK thank you. It was just odd that it was only this rotor. I hate having a bimmer whose breaks sqeal to a stop!

11-09-2011, 01:53 PM	#1
Dominus First Lieutenant Drives: 2009 Bmw 328i w/ XDrive Join Date: Oct 2011 Location: Indiana PA Posts: 325 iTrader: (0) Garage List 2009 BMW 328i [5.00]	abnormal rotor wear before i bought my e90 all four rotors and pads were replaced due to a bad shimmy whilst driving. now they work fine and run smooth but now the brakes squeal badly when stopping and i think im hearing them squeal during normal driving (think, because the wind is loud with the windows down and it doesnt do it at slow speeds?) i checked out all rotors today and they all look fine except the front drivers side near the top of the rotor there is an x pattern etched into it? any idea what this x pattern is from? thanks in advance a closer look
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11-09-2011, 02:40 PM	#2
e90pilot Freight Dawg Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA Posts: 1,950 iTrader: (3)	That pattern is cross hashing that helps bed the pats. It just hasn't worn away on that part of the rotor. Looks like you haven't been really using your brakes very hard. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Racing Brake 2-piece rotors Click here for review!

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11-09-2011, 02:44 PM	#3
tibra1 Banned Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC Posts: 6,779 iTrader: (4)	You need to spray some brake quiet on the back plate of the brake pads that will eliminate squeal..they prolly didnt do that when they replaced the brakes.

11-10-2011, 09:05 AM	#4
Dominus First Lieutenant Drives: 2009 Bmw 328i w/ XDrive Join Date: Oct 2011 Location: Indiana PA Posts: 325 iTrader: (0) Garage List 2009 BMW 328i [5.00]	OK thank you. It was just odd that it was only this rotor. I hate having a bimmer whose breaks sqeal to a stop!