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What causes the rust?!
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04-20-2013, 07:51 PM | #1 |
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What causes the rust?!
What causes the rust on the part of the rotor exposed behind the wheels, does everyone have this same problem? Car came from VA and I'm in the south, could it be related to salt and snow?
The reason I ask is because I am trying to decide if I should just clean them or clean and paint them to prevent this in the future.
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04-20-2013, 08:15 PM | #2 | |
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04-21-2013, 08:44 AM | #4 |
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Paint the rotors?
Did I read that correctly? Don't put anything on your rotors... for the love of god. A little rust on the rotors after a few days is normal for your standard factory rotors. (This happens when OXYGEN touches iron, a chemical process called oxidation. You're seeing iron oxide.) Water has O2, and salt acts as a catalyst, these inspire oxidation. If you put anti-seize on your rotors, your brake pads will fail to seize the rotors when you come to the first stop sign past your house. I hope you were mistaken when you wrote "rotors" |
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04-21-2013, 08:48 AM | #5 |
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are you talking about the braking surface or the hat?
If the braking surface it will wipe off as soon as you start driving If the hat the best way to deal with it is to use Centric premium rotors next time you do a brake job. I have not yet found a paint that works well... I've used the FLAPS spray can caliper paint on rotors and drums before and it's better than nothing but will not look perfect and detailed after a few months. |
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04-21-2013, 05:20 PM | #8 | |
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04-21-2013, 05:22 PM | #9 | |
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04-21-2013, 07:22 PM | #11 |
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04-21-2013, 07:28 PM | #12 | |
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04-21-2013, 09:16 PM | #13 |
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Never saw this on either of my Hondas, or any of my parents' cars. (Acura, Merc)
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04-21-2013, 09:18 PM | #14 |
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I could do without the smart ass comments, I'm asking this because I have never seen it this bad on any other car before, but I have seen a couple of people here mention it, just trying to see what I can do to stop or slow it down. I just sold a car I owned for 8yrs and never saw this. Yes there were hints of rust on the stopping surface but they came clean after using the brakes.
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04-21-2013, 09:23 PM | #15 |
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The part that is painted on these rotors is what I am talking about, but I want to keep my stock rotors just wondering how I can get these looking new again for as long as possible.
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04-22-2013, 08:10 AM | #16 | |
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My Jeep lived for 10 years or so in Pittsburgh; the rotors were pretty crusty when I replaced them. The rear drums didn't need replacing so I cooked all the heavy flaky rust off of them in my electrolytic tank (if you work on old cars you really should set one up, it's magical) and painted them with high-temp caliper paint from the parts store; you couldn't ask for better surface prep but it's only be about 6 months and already there's some rust showing through the paint. IME it's something you just have to live with and either ignore, repaint 2x a year, or never drive your vehicle in rain (I really didn't drive the Jeep in snow that much this year.) Now I did use Centric Premium rotors on the Jeep and it's only been a little over a year but the hats still look good, so they may be my go-to rotor going forward. I see they have a "high-carbon" version now as well. I believe that StopTech are made by Centric if you like drilled and/or slotted. Last edited by N8N; 04-22-2013 at 08:19 AM.. |
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04-22-2013, 08:54 AM | #17 |
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The rust bleeds from the bearing hub since BMW leaves it as just unfinished steel/iron. Paint it when the car is brand new and you will eliminate most of the rust.
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04-22-2013, 09:17 AM | #18 | |
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04-22-2013, 12:13 PM | #19 | |
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04-22-2013, 12:14 PM | #20 | |
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04-22-2013, 12:16 PM | #21 | |
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04-22-2013, 12:17 PM | #22 | ||
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