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Old 05-18-2014, 10:56 PM   #1
Tmick5jr
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upgraded to brembos. might have problem please help!

hey everyone i just installed brembos tonight and one of the rotors is looking funky after i just drove the car for about 10 miles. the left rear rotor kinda developed this rust spot traveling all the way around the rotor. there was a little tiny bit of rust on the pads though. could this be something wrong with the pads? Will this go away on its own? please help! i want to know if i should stop driving it or go get a part and fix it.

heres what I'm talking about-

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Old 05-18-2014, 11:12 PM   #2
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Well if you had rust on the pads then yes, I'm sure it rubbed off on the rotor.

Did you install used pads?

I'd take off the rotor and have it resurfaced and buy a set of rear pads. A set of Hawk HPS street go for less then $125.
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Old 05-19-2014, 06:02 AM   #3
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Bump. Anyone else?
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Old 05-19-2014, 09:05 AM   #4
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Did you do any sort of bedding-in procedure?


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Old 05-19-2014, 09:23 AM   #5
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What is a bedding in procedure? And do you think it will go away? Because another one of the rotors has developed it. And also as I'm about to come to a compete stop I have a squeak from my brakes. Will this go away over time? The pads were used with about 70% tread life left and the rotors were new.
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Old 05-19-2014, 09:24 AM   #6
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Are you sure that's not surface rust that was already there? If the pad hasn't touched that part of the rotor it will develop surface rust.
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Old 05-19-2014, 09:36 AM   #7
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Are you sure that's not surface rust that was already there? If the pad hasn't touched that part of the rotor it will develop surface rust.

I promise you it wasn't there before. I hope it goes away
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Old 05-19-2014, 09:56 AM   #8
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What is a bedding in procedure? And do you think it will go away? Because another one of the rotors has developed it. And also as I'm about to come to a compete stop I have a squeak from my brakes. Will this go away over time? The pads were used with about 70% tread life left and the rotors were new.
Basically, it's a form of "break-in" for pads and rotors. You make a few medium-ish decelerations from maybe 45 mph down to 20 or so, and follow that up with several harder decelerations from maybe 50 or a little higher. Then drive for several minutes to allow everything to cool, using the brakes to the absolute minimum amount possible (a few miles on an Interstate is as good a way as any). When you park the car, do not set the P-brake.

Do you know what pads they are? Brand and compound/name. Some pads are inherently noisier than others, and even with pads that are sometimes noisy sometimes they'll be quiet. My experience anyway.


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Old 05-19-2014, 10:02 AM   #9
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Basically, it's a form of "break-in" for pads and rotors. You make a few medium-ish decelerations from maybe 45 mph down to 20 or so, and follow that up with several harder decelerations from maybe 50 or a little higher. Then drive for several minutes to allow everything to cool, using the brakes to the absolute minimum amount possible (a few miles on an Interstate is as good a way as any). When you park the car, do not set the P-brake.

Do you know what pads they are? Brand and compound/name. Some pads are inherently noisier than others, and even with pads that are sometimes noisy sometimes they'll be quiet. My experience anyway.


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thanks norm, i feel like once i get some miles under them everything will be fine. i think the pads were the stock ones that came with brembos. i hope everything fixes itself!
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Old 05-19-2014, 10:03 AM   #10
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Are you sure you have the correct pads? It looks like the rust on the rotors is where the pads are not making contact.....I.E. the pads are to short and they do not contact the entire face of the rotor
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Old 05-19-2014, 10:17 AM   #11
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red bolt,
it looks like its getting full coverage right?

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Old 05-19-2014, 10:22 AM   #12
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red bolt,
it looks like its getting full coverage right?

Attachment 629424
Yes, it looks like it. maybe it will wear in after a while
How does the inside rotor surface look?
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Old 05-19-2014, 10:27 AM   #13
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Yes, it looks like it. maybe it will wear in after a while
How does the inside rotor surface look?
it all looks perfect other than that one spot. I got these off a guy who took them off his 2010 at 300 miles. so they were practically brand new. i have about 15 miles on them so far. hope it goes away without me having to buy new pads haha
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Old 05-19-2014, 11:49 AM   #14
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Seems weird to me so see the red paint on the pads themselves.......
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Old 05-19-2014, 12:58 PM   #15
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Quote:
Originally Posted by Norm Peterson View Post
Basically, it's a form of "break-in" for pads and rotors. You make a few medium-ish decelerations from maybe 45 mph down to 20 or so, and follow that up with several harder decelerations from maybe 50 or a little higher. Then drive for several minutes to allow everything to cool, using the brakes to the absolute minimum amount possible (a few miles on an Interstate is as good a way as any). When you park the car, do not set the P-brake.

Do you know what pads they are? Brand and compound/name. Some pads are inherently noisier than others, and even with pads that are sometimes noisy sometimes they'll be quiet. My experience anyway.


Norm
Do as Norm says. The Brembos like to be used hard. Smash them a few times.
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Old 05-19-2014, 02:40 PM   #16
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everytime a certain part of my rotor hits the pads i her like a grinding noise coming from both rears :( what could that be!
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Old 05-19-2014, 07:28 PM   #17
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You installed a take off Brembo kit from an SS on your V6 and hear a grinding noise? If that is the case, stop driving your car NOW! You have to isolate the cause of the grinding noise.
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Old 05-19-2014, 09:16 PM   #18
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You installed a take off Brembo kit from an SS on your V6 and hear a grinding noise? If that is the case, stop driving your car NOW! You have to isolate the cause of the grinding noise.
I'd have to agree here Something doesn't sound right.
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Old 05-19-2014, 09:57 PM   #19
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You installed a take off Brembo kit from an SS on your V6 and hear a grinding noise? If that is the case, stop driving your car NOW! You have to isolate the cause of the grinding noise.
here is a link to the video i made of the noise. help :(

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Old 05-19-2014, 10:01 PM   #20
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i put the car on jacks and rolled the wheels slowy myself and couldn't figure out what it is!
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Old 05-19-2014, 10:02 PM   #21
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Not sure by your vid. Really have to look at it but maybe warped rotors? Something is definitely not right.
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Old 05-19-2014, 10:06 PM   #22
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Not sure by your vid. Really have to look at it but maybe warped rotors? Something is definitely not right.
i just don't understand, i rotors had 300 miles on them, i don't think they can be warped? they looked brand new. I have an oil change appointment in the morning and they said they would look at the brakes. will gm even look at the brakes and try and find the problem since they aren't factory?
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Old 05-19-2014, 10:45 PM   #23
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You sure all pads are making contact?
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Old 05-19-2014, 10:56 PM   #24
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You sure all pads are making contact?
yep. they are all making contact. but why is it making that loud grinding noise? heres the link again:
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Old 05-20-2014, 12:38 AM   #25
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i just don't understand, i rotors had 300 miles on them, i don't think they can be warped? they looked brand new. I have an oil change appointment in the morning and they said they would look at the brakes. will gm even look at the brakes and try and find the problem since they aren't factory?
No idea without looking at it. Just a guessing game till you have someone look at it. Doesn't sound good though.

Almost looks like the caliper is moving in the video but could just be an optical illusion.
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