04-17-2024, 03:33 PM | #1 |
Major General
2775
Rep 6,378
Posts |
Are these brake rotors used or damaged?
I received some rotors as I'm about to do my front brakes. As you can see from the pictures, one rotor has this weird looking rust or wear? I've never ever received rotors that looked like this. You can see how the other rotor I received is normal.
Is this common or is this normal? Or maybe the protective coating wasn't done properly? |
04-17-2024, 04:56 PM | #2 |
Major General
3575
Rep 7,139
Posts |
New brake rotors are often covered with an anti-rusting “oil” to prevent the iron in the rotor from rusting before use. It appears it either wasn’t uniformly applied or it’s worn away with time. You should use something like Brakleen (brake clean spray) before using the rotors. I find it extremely odd that the rotors were all delivered in one box without each rotor being in its own box. Where did you order these from?
|
Appreciate
1
tracer bullet3523.50 |
04-17-2024, 05:14 PM | #3 | |
Major General
2775
Rep 6,378
Posts |
Quote:
Oh just to clarify, 2 of these pictures are the same rotor and the third one is one of the rotor that are good. They both came in their own boxes. |
|
Appreciate
0
|
04-17-2024, 05:23 PM | #4 | |
Major General
3575
Rep 7,139
Posts |
Quote:
So these pictures were taken after trying a brake cleaning spray? If the holes were drilled in after the rotor was cast, it’s possible it’s from the drilling process with a cooling fluid being used. It seems like it all starts with the holes. |
|
Appreciate
0
|
04-17-2024, 05:26 PM | #5 |
Major General
2775
Rep 6,378
Posts |
I took a second look at the hub/hat sides and it's not as bad as I thought so I guess I'll just install these as is. Won't be seen to much through the wheel.
|
Appreciate
0
|
04-17-2024, 05:31 PM | #6 | |
Major General
2775
Rep 6,378
Posts |
Quote:
I took the pictures before trying the brake clean but after trying it, they look the exact same. |
|
Appreciate
0
|
04-17-2024, 06:20 PM | #7 |
Brigadier General
4125
Rep 4,353
Posts |
These are definitely brand new. Used or even skimmed rotors don't have surface patterns like that.
|
Appreciate
1
tracer bullet3523.50 |
04-17-2024, 06:37 PM | #8 |
Major General
3575
Rep 7,139
Posts |
Correct. I believe we’re all in agreement they are new. The question is what’s causing the surface staining - “oil”, incomplete/improper surface coating/treatment, etc? Will the surface staining wear off if installed with new pads or will you get an incomplete/inconsistent pad transfer layer? Would a cold race pad compound machine off the surface layer or …
|
Appreciate
0
|
04-17-2024, 06:42 PM | #9 | |
Major General
3575
Rep 7,139
Posts |
Quote:
What pads are you using with these rotors? |
|
Appreciate
0
|
04-17-2024, 06:59 PM | #10 |
Brigadier General
4125
Rep 4,353
Posts |
Looks like a slightly worn off or unevenly applied oil coating. I wouldn't worry about it and just use as is. If it worries you give it a spray of brake cleaner.
|
Appreciate
0
|
04-17-2024, 07:19 PM | #11 |
Major General
3575
Rep 7,139
Posts |
He says he applied brake clean and no change. I just did a search and found quite a few complaints about their e line rotors. Geomet apparently are far superior. One thing I noticed with the e line is the rotor pad radial depth is longer than the actual pad radial depth which leaves what appears to be an unswept area of the rotor. For the e line this starts to rust immediately and continues to rust because the pad is not deep enough to reach the rotor IR. Geomet rotors have a double step from the mounting hat to the rotor surface and, therefore, the pad and rotor radial depths are the same so no rusty unswept area around the rotor IR.
|
Appreciate
0
|
04-17-2024, 07:40 PM | #12 | |
Major General
2775
Rep 6,378
Posts |
Quote:
But about the rusting, the whole rotor is coated, so the unswept portion just stays coated. Granted I know the zinc coating will most likely not last the life of the rotor but like for now and a salty Canadian winter, the rears still look fine. |
|
Appreciate
0
|
04-17-2024, 09:43 PM | #13 | |
Major General
3575
Rep 7,139
Posts |
Quote:
The rust was forming on a brand new e line zinc coated rotor. R1 Concepts solution was to spray paint the part of the unswept rotor black with high-temp caliper paint. That’s a company that stands behind their product |
|
Appreciate
0
|
04-18-2024, 03:51 PM | #14 |
Colonel
1529
Rep 2,143
Posts |
So have you completed the install on all 4? How did it all come out?
__________________
2023 BMW X5MC Tanzanite Blue II Metallic
2021 Jeep Grand Cherokee SRT Black 2006 Ford Mustang GT Convertible (show car) |
Appreciate
0
|
04-18-2024, 03:55 PM | #15 | |
Major General
2775
Rep 6,378
Posts |
Quote:
I also discovered kind of like a crack/line on the face of the rotor around the hub, hard to see in the pic but figured I wouldn't take chances with a potentially failed coating either. The other rotor does not have that line and if I recall correctly, none of the rear rotors had that line/mark either. |
|
Appreciate
0
|
04-18-2024, 04:00 PM | #16 |
Colonel
1529
Rep 2,143
Posts |
Crack/line is never good news, unless you are a junkie (pun intended), but not on a rotor. Thx for the update.
__________________
2023 BMW X5MC Tanzanite Blue II Metallic
2021 Jeep Grand Cherokee SRT Black 2006 Ford Mustang GT Convertible (show car) |
Appreciate
1
TheMidnightNarwhal2774.50 |
04-18-2024, 04:43 PM | #17 |
Lieutenant
338
Rep 590
Posts |
new old stock, the rotors have been sitting for a while, and the wet coating has dried/stained. Always check rotors/heavy items shipped because they are more likely to have been dropped several times.
|
Appreciate
0
|
04-22-2024, 07:12 PM | #18 |
Major General
2775
Rep 6,378
Posts |
Well interesting update, I received my free replacement from Rockauto and it was still stained a bit but meh whatever it was okay enough to the point I was going to install. I just wanted to confirm with R1 concepts if this was coating failure or something like that and that it was fine to use and install them, so I called them and they asked me to send them some pictures of the rotors. They replied and told me they would go ahead and just replace it again. Since they offered I went ahead and said yes and figured having a replacement directly from them I'll for sure get a shiny clean rotor! Appreciate their great customer service and let's hope third time is the charm.
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|