Brake rotor worn... rather weirdly...
#3
sounds like the pad may have had a flaw or something in it, the only time i've seen wear like that was when I ran the pads to thin on one of my other cars before I knew better and it was caused by the studs that held the organic pad onto the metal calipers.
#5
I'm going to say either...
-Rock in the pad
-Magic
A pad would have to be pretty worn down for the rivet to carve a groove in the rotor like that. What did the pads look like?
-Rock in the pad
-Magic
A pad would have to be pretty worn down for the rivet to carve a groove in the rotor like that. What did the pads look like?
#7
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I found the same thing on the my GSL when I bought it. I didn't take the time to investigate the cause, just swapped rotors and pads along with the engine from a donor car to get it running. Rivets seem unlikely, just recently replaced front pads on both sevens which were worn down to almost metal, rotors were still fine.
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#9
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I've seen it millions of times in all the brake jobs I've done. It's caused by imperfections in the brake pad friction material.
Either a rock gets wedged up in there or something... Brake linings are kinda like particle board. They're soft material compressed with an adhesive. It depends a lot on the consistency of the soft material and how much adhesive gets put in the mix.
In fact, some brake shoes, I've seen ingredients lists on the back of the box. On that particular box, the first ingredient was "crushed walunt shells"...
Either a rock gets wedged up in there or something... Brake linings are kinda like particle board. They're soft material compressed with an adhesive. It depends a lot on the consistency of the soft material and how much adhesive gets put in the mix.
In fact, some brake shoes, I've seen ingredients lists on the back of the box. On that particular box, the first ingredient was "crushed walunt shells"...
#10
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I had something just like that on my FB. Not sure if it applies to SA because the front bakes are different, but on the FB the pads are held in place by some little metal springs. In the case of my FB, the springs rode low and put the groove into the rotor.
#11
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Rotors are dirt cheap at www.rockauto.com I just got a set of the cheapest they sell, and they look fine. Put a cheap set on the Audi too, and the brakes have never been better.
My guess on your condition is that at one time someone ran the pads down too far, and the rivets dug a groove. I'd say this is most likely, unless you are shure that this hasn't ever happened. However, its always a good idea to pull the caliper off and lube those pins. If you're lucky, you'll get catch them before they become "welded" to the caliper. Good luck...
My guess on your condition is that at one time someone ran the pads down too far, and the rivets dug a groove. I'd say this is most likely, unless you are shure that this hasn't ever happened. However, its always a good idea to pull the caliper off and lube those pins. If you're lucky, you'll get catch them before they become "welded" to the caliper. Good luck...
#12
premix, for f's sake
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we usually see that on half the brakes that come through my work, either debris got in there or someone has been using the same rotors for multiple brake jobs, not uncommon. (never pad slap your cars!!!!!,don't just buy pads and call it done, measure your rotors and machine them down if enough material is left, otherwise replace them, or else your gonna have a brake job thats barely worth the 20 bucks you just spent on the pads)
#13
Originally Posted by Sgt.Stinkfist
we usually see that on half the brakes that come through my work, either debris got in there or someone has been using the same rotors for multiple brake jobs, not uncommon. (never pad slap your cars!!!!!,don't just buy pads and call it done, measure your rotors and machine them down if enough material is left, otherwise replace them, or else your gonna have a brake job thats barely worth the 20 bucks you just spent on the pads)
any idea were to get good rotors at? im planning on slotted. if i have to replace it, why not do it right?
#14
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Originally Posted by Kentetsu
Rotors are dirt cheap at www.rockauto.com I just got a set of the cheapest they sell, and they look fine. Put a cheap set on the Audi too, and the brakes have never been better.
My guess on your condition is that at one time someone ran the pads down too far, and the rivets dug a groove. I'd say this is most likely, unless you are shure that this hasn't ever happened. However, its always a good idea to pull the caliper off and lube those pins. If you're lucky, you'll get catch them before they become "welded" to the caliper. Good luck...
My guess on your condition is that at one time someone ran the pads down too far, and the rivets dug a groove. I'd say this is most likely, unless you are shure that this hasn't ever happened. However, its always a good idea to pull the caliper off and lube those pins. If you're lucky, you'll get catch them before they become "welded" to the caliper. Good luck...
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