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#1
06-25-2010, 05:28 PM
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Front brakes
Not being familiar with BMW brake systems, does anyone know if I can simply turn them? They are beginning to pulse just a bit, typical of warped rotors being used under heavy breaking.
Thanks,
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2009 E70 White w/black int 2006 E53 X5 4.8is Sold 2000 SVT Cobra R #193 2003 SVT Mustang convertible 
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#2
06-25-2010, 05:34 PM
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BMW doesn't put a lot of meat on the rotors, probably to keep unsprung weight down. Technically you can turn them, but you won't find many people that recommend it. I didn't turn my own, and I have free access to a brake lathe.
The minimum thickness is stamped on the rotor if you do decide to pursue this. As an aside, the concept of warped rotors gets lots of discussion, and the brake suppliers tend to focus on pad deposition more than warping. If it was physical warping, you could measure run out or high spots. You may want to try deglazing them if you want to play with it instead of replacing the rotors. Stoptech: The myth of warped rotors
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue Last edited by JCL; 06-25-2010 at 05:39 PM.
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#3
06-30-2010, 11:51 PM
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I cut my rotors last fall because they were warped. Worked great for a few months. The pulsing came back so I just got new brakes and rotors all around. I went with cross-drilled and slotted rotors with ceramic pads from irotors.com
can't described how much better they stop than stock not to mention how nice they look. I get compliments from random people all the time, especially at the gas station They only cost about $400 I went with the $10 more for ceramic pads BMW X5 E53 [00-06] Cross Drill Slot Front & Rear Brake Rotors & Pads
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