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Brake rotor life?

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Old Mar 13, 2006 | 09:51 AM
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projekt_shocker's Avatar
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Brake rotor life?

how long do stock oem brake rotors last? I have about 48000 miles on the car and I hear noises coming out from the front brakes. I assume that my pads are out but wanted to know if its okay just to leave my old rotors and replace my pads.

any solutions ??
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Old Mar 13, 2006 | 01:50 PM
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depending on how you drive.

I think the front rotors are around 1.2 inches overall thickness minimal and rear is somewhere around .83 inches.

I would take the tires out and measure them to make sure you have enough meat on the rotors.

Stock rotors don't last that long if you race them.

If I was you, which I'm not and I'm glad I'm not, I would go check the pad's thickness as well.

for all you know, back plate on the brake pads are probably grinding the rotors away. And it's 80% sure that it'll be one of the inside pads.
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Old Mar 13, 2006 | 01:53 PM
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brake pads are designed with "squeelers" that will make noise when the pads are approaching the end of their service life. My guess is that's your problem. You can usually turn a set of rotors once, maybe twice without a problem.
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Old Mar 13, 2006 | 02:02 PM
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you're not suppose to turn evo rotors, because there isn't that much meat on it.

measure the rotors first before you turn them.

The rotor min thickness is written on the hub of the rotor.

what sorta noise is it making?

squeeking = brake pad low warner (metal thing)

metallic noise that's not high pitched and you could feel it in your brake paddles = pads dead.
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Old Mar 13, 2006 | 02:35 PM
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Where did you get this info? The stock rotors, in anticipation of being used with high-performance, abrasive brake pads, have an ample amount of wear built into them. Unless you used racing brake pads that are as hard as the rotors, you should be able to get at least two sets of brake pads per rotor (I'm at the tail end of my second set of stock pads, and have plenty of rotor thickness left, according to the dealer who measured it, and could have tried to sell me rotors).

And you don't have to machine (turn) the rotors every time you replace the pads. You're just reducing their life by doing that. You turn the rotors only if you feel a pedal/steering-wheel vibration on braking, indicating that the rotors have uneven thickness (usually due to overheating resulting in deposits from the brake pads onto the rotor). In particular, you don't have do it just because there are minor grooves in the rotor (less than 1/32 in.). This is normal.

Originally Posted by 32 psi daily
you're not suppose to turn evo rotors, because there isn't that much meat on it.

measure the rotors first before you turn them.

The rotor min thickness is written on the hub of the rotor.

what sorta noise is it making?

squeeking = brake pad low warner (metal thing)

metallic noise that's not high pitched and you could feel it in your brake paddles = pads dead.
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Old Mar 13, 2006 | 03:02 PM
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http://www.stoptech.com/tech_info/wp...rakedisk.shtml

Even Stock EVO pads are agressive enough to remove any warpage which is caused by pad deposits, and not a true metal deformation of the disk. In short, the EVO rotors do not need to be turned.

Also according to point .. when in doubt, measure.

Good Luck,
~j.
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Old Mar 13, 2006 | 09:28 PM
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nah i dont have vibrations when i brake pretty hard sometimes... but i get this noise .. like a dry grinding noise coming from the front brakes. at first i thought it was alot of brake dust making that noise but it kept on doing it.... this all started when i took out the front tire out to do my oil change... and put that back on...

yes the lugs are all tighten... and the wheel is not loose either...
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Old Mar 14, 2006 | 03:54 AM
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Your pads are probably worn out and you're hearing the metal backing scraping on the rotor. Don't wait till the noise gets worse. Have them looked at right away. Or better yet, pull them yourself. It's easy. There are how to's on this site, if you search.

Originally Posted by projekt_shocker
nah i dont have vibrations when i brake pretty hard sometimes... but i get this noise .. like a dry grinding noise coming from the front brakes. at first i thought it was alot of brake dust making that noise but it kept on doing it.... this all started when i took out the front tire out to do my oil change... and put that back on...

yes the lugs are all tighten... and the wheel is not loose either...
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Old Mar 14, 2006 | 05:24 AM
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Originally Posted by point&shoot
Where did you get this info? The stock rotors, in anticipation of being used with high-performance, abrasive brake pads, have an ample amount of wear built into them. Unless you used racing brake pads that are as hard as the rotors, you should be able to get at least two sets of brake pads per rotor (I'm at the tail end of my second set of stock pads, and have plenty of rotor thickness left, according to the dealer who measured it, and could have tried to sell me rotors).

And you don't have to machine (turn) the rotors every time you replace the pads. You're just reducing their life by doing that. You turn the rotors only if you feel a pedal/steering-wheel vibration on braking, indicating that the rotors have uneven thickness (usually due to overheating resulting in deposits from the brake pads onto the rotor). In particular, you don't have do it just because there are minor grooves in the rotor (less than 1/32 in.). This is normal.
obviously, you don't drive hard enough. That and where are you basing your opinion on? have you even measured the rotors yet?

you say things like "there are plenty of rotor thickness" without telling us why this is, or saying "according to the dealer", which is same as "someone I know told me".
The stock rotors, in anticipation of being used with high-performance, abrasive brake pads, have an ample amount of wear built into them.
This statement is just about the most vague statement anybody could make.

The fact is, with organic pads, there are only so much room to play with on stock rotors. within 2 weeks of using any brake pads that's worth a damn, you'll be looking at losing .02 inches off of the stock rotor or more.

Last edited by 32 psi daily; Mar 14, 2006 at 05:26 AM.
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