Preventing crummy brake rotors when parked outside? - Fuelly Forums

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Old 11-01-2007, 01:30 PM   #1
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Preventing crummy brake rotors when parked outside?

Is there a simple way to keep my brake rotors from going bad if I don't drive my car much?

Because I have only been using it a couple of times a month lately, they "thump-thump-thump" and the pedal pulses until I do a bunch of relatively hard stops to scrub them clean (which I hate to do, because hard stops = bad FE).

The car is parked outside. The wheel covers are already fully sealed, so its not a question of rain getting in (from the outside of the wheel, anyway). So it must just be atmospheric moisture doing this.

I suspect the easiest solution is to just go for a drive once a week or so and use the **** brake pedal. Am I wrong?
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Old 11-01-2007, 01:38 PM   #2
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Originally Posted by MetroMPG View Post
they "thump-thump-thump" and the pedal pulses until I do a bunch of relatively hard stops to scrub them clean (which I hate to do, because hard stops = bad FE).
As far as I know rotors shouldn't go bad from sitting, aside from a bit of surface rust. Thump, thump, thump sounds like they need to be turned. I don't think that they would need this from sitting, but I could be wrong.
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Old 11-01-2007, 01:42 PM   #3
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Well, it goes away with multiple hard brake applications, so I'm thinking it's just surface rust. It's not warped, just unevenly corroded

The longer I let it sit between drives, the more & harder stops I have to do to get the thumping & pulsing to go away.

clencher: in the past I've bought replacement rotors from the store that came with some kind of light waxy coating (which I assume is for rust prevention), but it would obviously be a pain in the *** to re-coat the rotors after every drive!
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Old 11-01-2007, 01:46 PM   #4
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Get some aluminum rotors.
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Old 11-01-2007, 02:13 PM   #5
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No, really? If that's true, I'm sure I can't get them for this car anyway.
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Old 11-01-2007, 02:19 PM   #6
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Get some aluminum rotors.
Is aluminum robust enough for that application? I would think that the repeated heating and cooling would affect its integrity and that the aluminum surface would be too soft. I googled it and didn't find a whole lot.

EDIT: Ahh, I found some online.
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Old 11-01-2007, 02:20 PM   #7
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I don't know if their is anything you can do. I do know that other than the thump's and noise, the rust doesn't seem to create any undue harm.

I've had a couple of cars which have been largely unused for extended periods of time. The first one, I took apart and sanded the rust off, before i used it. I got lazy the next time, so I just drove it and used the brakes, as I needed to. They seemed to clean up just fine. I don't think it will cause the rotors to warp, in any way.
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Old 11-01-2007, 02:25 PM   #8
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The insight came with stock aluminum rotors, their cool, dunno if they can be found for the metro through.

Any metros come with rear discs?
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Old 11-01-2007, 03:07 PM   #9
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wd40?
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Old 11-01-2007, 03:16 PM   #10
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wd40?
NO!!! NEVER apply oil to your brake rotors or any part of your breaking system.

the oil soaks into the pads and your never stopping again.(try it on a bycycle)and then ya gotta buy new pads.

theres nohtign u can really do to prevent it anyways.
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