| I'm new to the forum and I have a couple questions about a brake job. I'll separate the two questions, according to the forum rules. A friend of mine needed some cash so I hired him to change my brakes. When I picked up my car, I noticed he took a sanding disk to my rotors. The job is isn't uniform like I've seen before and is pretty ugly. Some of the scratches look pretty deep. I'm including pics, you may have to zoom in. He doesn't have the cash to replace my rotors, so I'll have to just eat it if they need to be replaced. Here are my questions: Do they need to be replaced or with the scratches smooth out over time? If they do smooth out, will it cause more wear on my new brake pads or shorten their life? I've asked around on another forum but got mixed opinions so I thought I'd try here. Thanks in advance. |
Sanded Rotors
- Thread starter thejon
- Start date
Brake rotors are a wear item. What he did to them probably didn't do much but also didn't hurt them in the least. Drive your car and don't worry about it.
Did you really ask him to replace the rotors out of his own pocket for this? Jeez.
Did you really ask him to replace the rotors out of his own pocket for this? Jeez.
Drive it, but don't allow him to come 10ft or closer to your car anymore.
To be effective, you need a real machine to machine the rotors, preferably an on-car brake lathe.
That sanding might be worse than not sanding them at all
The sanding marks should've gone away within the first few stops!
Also, I see your rotors are already rusting. Next time get coated rotors
That sanding might be worse than not sanding them at all
The sanding marks should've gone away within the first few stops!
Also, I see your rotors are already rusting. Next time get coated rotors
I didn't ask him to replace them but honestly, I wanted to (thinking he messed them up and I would have to get them replaced).
I've driven about 40 or 50 miles and they're still there. So, you don't think the rough surface will make the brakes wear quicker?To be effective, you need a real machine to machine the rotors, preferably an on-car brake lathe.
That sanding might be worse than not sanding them at all
The sanding marks should've gone away within the first few stops!
Also, I see your rotors are already rusting. Next time get coated rotors
While ugly, that really won't help or hurt. Next time, don't bother with this type of sanding. We used to sand rotors before new pads, not so roughly though. The reason was for rapid pad fitment to a somewhat unevenly worn rotor.
Slotted and drilled rotors have far more aggressive "holes" in the surface, with no real affect on wear. Wear rates are more a function of pad material and friction produced (how much use)
Thats a easy way to remove the glaze from the rotors. They actully need more sanding to be more uniform. Those that are saying its a wrong way have never seen a new rotor and what it looks like.
They're fine actually. His idea was to score the surface so the pads would wear in better. He could do my brakes anytime!
I agree He did a great job grinding off the wear ridge but could have ground the shine off. I’ve roloc’d used rotors a few times. It’s never caused me any issues, but rotors are generally pretty cheap, so most brake jobs I do now get rotors. I have pad slapped a couple of cars that came back quickly with pedal pulsation after a few hundred miles. I think that the pad material didn’t play well with the former pad material deposited on the swept surface. Maybe I would have had better luck if I’d deglazed the rotors.
Old wives tale. Smoother is better for all rotor finishes. Have you seen how smooth the rotor finish is on new Genuine Toyota rotors?
Just sayin', it won't hurt a thing.
Heres a bad pic of my rotor I sanded on my jeep about 5000 miles ago. I went from ceramic pads to metallic and wanted to get any deposits off the rotors..
Gotta do what you gotta do when broke.
Gotta do what you gotta do when broke.
It can cause noise issues.
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- Mar 13, 2024
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If the car brakes just fine and there's no pulsing or anything I think it should be just fine. I'd imagine the scratches will go away after some use.
If you're going to do it, at least use the right tools for the job,
That isn’t going to go away unless the OP used some very aggressive semi-metallic pads.
I'm not the one who did it but I'm pretty sure my buddy who did the job used regular sandpaper disks, probably 60-80 grit or something like that.
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