I need advice regarding a (DIY?) brake job

doubled24 · 07-28-2010, 12:15 PM

Ok, so a year ago or something I hit a pot hole, busted a rear rim. I replaced with aftermarket wheels which never seemd to quite balance up properly. I got rid of those wheels and went back to a set of OEM wheels, which started getting out of balance again. I rebalnced them, and again they became unbalanced 5k miles later.

Ugh, so I just recently put on brand new tires in the rear. Everything is going GREAT for about 2k miles, then i start to feel that shimmy (FML).

I've had this thing looked over more than once and nobody has spotted any damage. Finally today I just started looking around in there and find this:

View post on imgur.com

Rotor obviously has damage and so I'm thinking I need to replace both the rear rotors. Fine, but I have a couple of questions about it....

1) What could possibly have impacted the rotor that hard to leave such a dent in it? - granted it was probably pretty HOT b/c the wheel was borked in a rather spirited canyon cruise

2) Can I just unbolt everything and replace the rotors, or am I going to need to replace the pad sensors? The pads themselves are fairly new, so I'm thinking I Should just leave those be.

3) Would you expect to find any other damaged components in there, if so which ones?

dcorn · 07-28-2010, 12:36 PM

Get the suspension checked over really well. If you are wearing out tires that bad, something in your alignment is way off.

Oh, and your pic is too blurry to even see what you are talking about. Try taking one without the flash.

doubled24 · 07-28-2010, 12:49 PM

I've had the alignment done. There aren't any abnormal wear patterns on the tires and still tons of tread, I'm just guessing the warp in the rotor is causing 1 slide to wear ever so slightly faster than the other... a few grams of rubber and you are out of balance.

hmmm nevermind i think i just spotted a machine out part of the inside of the rotor.... idk why the fuck they would do that now im back to square 1

salbrecht · 11-21-2010, 11:42 PM

So I may be missing something here but what does wheel balance have to do with DIY brake change? http://www.e90post.com/forums/images/smilies/lol.gif

BKV122 · 11-22-2010, 06:11 PM

You can replace your rotor without replacing pads or sensor. Should be pretty easy follow the DIY on the site in the DIY section.

Babydragon · 11-22-2010, 08:16 PM

Just take the caliper off and swap
Out the rotor with a new one, it's easy.

07-28-2010, 12:15 PM	#1
doubled24 Private First Class 15 Rep 116 Posts Drives: 07 e92 Join Date: Jun 2009 Location: TX iTrader: (0)	I need advice regarding a (DIY?) brake job Ok, so a year ago or something I hit a pot hole, busted a rear rim. I replaced with aftermarket wheels which never seemd to quite balance up properly. I got rid of those wheels and went back to a set of OEM wheels, which started getting out of balance again. I rebalnced them, and again they became unbalanced 5k miles later. Ugh, so I just recently put on brand new tires in the rear. Everything is going GREAT for about 2k miles, then i start to feel that shimmy (FML). I've had this thing looked over more than once and nobody has spotted any damage. Finally today I just started looking around in there and find this: View post on imgur.com Rotor obviously has damage and so I'm thinking I need to replace both the rear rotors. Fine, but I have a couple of questions about it.... 1) What could possibly have impacted the rotor that hard to leave such a dent in it? - granted it was probably pretty HOT b/c the wheel was borked in a rather spirited canyon cruise 2) Can I just unbolt everything and replace the rotors, or am I going to need to replace the pad sensors? The pads themselves are fairly new, so I'm thinking I Should just leave those be. 3) Would you expect to find any other damaged components in there, if so which ones?
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07-28-2010, 12:36 PM	#2
dcorn Captain 77 Rep 940 Posts Drives: 2008 E90 335i Join Date: Dec 2009 Location: NoVA iTrader: (2)	Get the suspension checked over really well. If you are wearing out tires that bad, something in your alignment is way off. Oh, and your pic is too blurry to even see what you are talking about. Try taking one without the flash.
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07-28-2010, 12:49 PM	#3
doubled24 Private First Class 15 Rep 116 Posts Drives: 07 e92 Join Date: Jun 2009 Location: TX iTrader: (0)	I've had the alignment done. There aren't any abnormal wear patterns on the tires and still tons of tread, I'm just guessing the warp in the rotor is causing 1 slide to wear ever so slightly faster than the other... a few grams of rubber and you are out of balance. hmmm nevermind i think i just spotted a machine out part of the inside of the rotor.... idk why the fuck they would do that now im back to square 1 Last edited by doubled24; 07-28-2010 at 01:07 PM..
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11-21-2010, 11:42 PM	#4
salbrecht New Member 4 Rep 11 Posts Drives: 2010 320d Join Date: Nov 2010 Location: Ban Phe, Rayong iTrader: (0)	Incorrect thread title ??? So I may be missing something here but what does wheel balance have to do with DIY brake change? http://www.e90post.com/forums/images/smilies/lol.gif __________________ 2010 320d The difference between genius and stupidity is that stupidity is unbounded. Steve Albrecht
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11-22-2010, 06:11 PM	#5
BKV122 Major 47 Rep 1,160 Posts Drives: E90 Join Date: Feb 2009 Location: NY iTrader: (1) Garage List 2006 330xi [9.50]	You can replace your rotor without replacing pads or sensor. Should be pretty easy follow the DIY on the site in the DIY section. __________________ Monaco Blue 330xi - Terra Interior/6-MT/Sport/Premium/Cold/CSL's/M3 Spoiler Lip/Black Kidney's
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11-22-2010, 08:16 PM	#6
Babydragon Captain 34 Rep 781 Posts Drives: 2007 328xi Join Date: Nov 2010 Location: Chic/ago iTrader: (0)	Just take the caliper off and swap Out the rotor with a new one, it's easy.
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