Friend's brembo brake have a problem. any ideas?

LOWCAM · 10-24-2023, 12:47 AM

this is F82 M4 and he upgraded with brembo 6P brakes.
as you can see in the image, brake pad, rotor scored right above where the metal part of the pad is placed. so in my opinion it's not debris caused this to happen
is this caused of bad brake pads? or improper brake install? or bad driving habits? any ideas?

robbo mcs · 10-24-2023, 03:32 AM

The technical term for that is disc scoring. That is a very severe case!

As there are mutiple lines, it is unlikely to be foreign material getting between the pad and disc. More likely to be a problem with the pads, poor pad material, contaminated pads, faulty pads with incorrectly mixed compound. Unlikely to be from overuse (unless the other side looks the same). Could also be from faulty disc, but less likely

Makes we wonder if the pads are legit, ie could be fakes?

Tangent · 10-24-2023, 10:29 AM

I have no idea what those little circles are in the pads but since they directly line up with where the pad is worn more it's safe to say they're softer than the rest of the pad and are the cause of this wear. I'd contact the pad manufacturer and see if they can shed some light on it; I'd say they owe your friend new pads and rotors.

FaRKle! · 10-24-2023, 10:55 AM

Quote:

Originally Posted by Tangent

I have no idea what those little circles are in the pads but since they directly line up with where the pad is worn more it's safe to say they're softer than the rest of the pad and are the cause of this wear. I'd contact the pad manufacturer and see if they can shed some light on it; I'd say they owe your friend new pads and rotors.

Those "circles" are rivets and are how the brake pad material is attached/held onto the backing plate.

Tangent · 10-24-2023, 03:28 PM

Quote:

Originally Posted by FaRKle!

Those "circles" are rivets and are how the brake pad material is attached/held onto the backing plate.

Going that deeply into the pad material though? That doesn't seem right...

FaRKle! · 10-24-2023, 03:59 PM

Quote:

Originally Posted by Tangent

Going that deeply into the pad material though? That doesn't seem right...

Yes, they go quite deep into the material. My Ferodo DS3.12 are the same way, except the rivets aren't significantly different in wear/hardness from the main pad material.

NickyC · 10-24-2023, 06:34 PM

That is one janky looking "BBK". :O

hC1001 · 10-25-2023, 02:47 PM

Looks like those rotors are way pass min thickness judging by the leftover slotted marks.

Was the wear always like this since new or did it only recently happens? Are the other corners of the car showing same wear?

I've heard of cheap iron rotor rings causing bad wear but nothing this extreme.

10-24-2023, 12:47 AM	#1
LOWCAM New Member 5 Rep 18 Posts Drives: 2010 E92 M3 Alpine Edition Join Date: Sep 2022 Location: South Korea iTrader: (0)	Friend's brembo brake have a problem. any ideas? this is F82 M4 and he upgraded with brembo 6P brakes. as you can see in the image, brake pad, rotor scored right above where the metal part of the pad is placed. so in my opinion it's not debris caused this to happen is this caused of bad brake pads? or improper brake install? or bad driving habits? any ideas? Attached Images
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10-24-2023, 03:32 AM	#2
robbo mcs First Lieutenant 143 Rep 321 Posts Drives: F82 M4 and others Join Date: Apr 2014 Location: Sydney iTrader: (0)	The technical term for that is disc scoring. That is a very severe case! As there are mutiple lines, it is unlikely to be foreign material getting between the pad and disc. More likely to be a problem with the pads, poor pad material, contaminated pads, faulty pads with incorrectly mixed compound. Unlikely to be from overuse (unless the other side looks the same). Could also be from faulty disc, but less likely Makes we wonder if the pads are legit, ie could be fakes?
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10-24-2023, 10:29 AM	#3
Tangent Lieutenant 303 Rep 587 Posts Drives: G01, F82, E89, F25 Join Date: Jun 2015 Location: California iTrader: (2)	I have no idea what those little circles are in the pads but since they directly line up with where the pad is worn more it's safe to say they're softer than the rest of the pad and are the cause of this wear. I'd contact the pad manufacturer and see if they can shed some light on it; I'd say they owe your friend new pads and rotors.
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10-24-2023, 06:34 PM	#7
NickyC Lieutenant General 17683 Rep 10,737 Posts Drives: M4 CS. Former G82, x2 F82, F80 Join Date: Nov 2010 Location: Jacked out of my mind iTrader: (23)	That is one janky looking "BBK". :O
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10-25-2023, 02:47 PM	#8
hC1001 Major 610 Rep 1,015 Posts Drives: E36 M3, F80 M3 Join Date: Nov 2019 Location: Brooklyn, NY iTrader: (4)	Looks like those rotors are way pass min thickness judging by the leftover slotted marks. Was the wear always like this since new or did it only recently happens? Are the other corners of the car showing same wear? I've heard of cheap iron rotor rings causing bad wear but nothing this extreme.
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