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Old 02-12-2015, 08:11 AM
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Rusty hub?

I noticed something odd on my '14 JKU recently and am hoping someone may know what's happening.

Soon after I bought the JKU, I noticed what seems to be rust residue flowing out from behind the center cap on the front passenger wheel. When I had the oil changed a couple of months ago, I had them rotate the tires as well. Of course, the service dept folks didn't mention anything (since I had already washed the vehicle) about any rust. However, the center cap for the wheel that was originally in the front passenger side was loose and eventually disappeared.

Yesterday, I noticed that there was a bunch of rust residue on the front passenger wheel just like before. Again, the source is from behind the center cap.

What could be behind it that keeps rusting and pooling water to cause this?

Thanks!

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Old 02-12-2015, 08:17 AM   #2
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The rotors are steel, they will rust no matter what you do. But I found the best trick is to remove the wheels, after a few minutes of driving to heat the rotors up(be careful they can get very hot), then wire brush the hat/hub of the rotor to remove as much of the surface rust as you can. Then get a vanilla folder to help keep the spray off the rotor surfaces while spraying, and put some painters tape on the threads for the wheel bolts. Then spray the hub/rotor hats with high temp Rustoleum Primer gray, they will look like a million dollars, and it holds up well. Any slight overpsray(but contain most of it with the vanilla folder) on the rotor surface won't be a big deal, it will burn/scrape off when you drive it.

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Old 02-12-2015, 08:25 AM
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Originally Posted by ocd_dave View Post
The rotors are steel, they will rust no matter what you do. But I found the best trick is to remove the wheels, after a few minutes of driving to heat the rotors up(be careful they can get very hot), then wire brush the hat/hub of the rotor to remove as much of the surface rust as you can. Then get a vanilla folder to help keep the spray off the rotor surfaces while spraying, and put some painters tape on the threads for the wheel bolts. Then spray the hub/rotor hats with high temp Rustoleum Primer gray, they will look like a million dollars, and it holds up well. Any slight overpsray(but contain most of it with the vanilla folder) on the rotor surface won't be a big deal, it will burn/scrape off when you drive it.
It is only that one that is doing it, though. I was wondering if there was a piece missing?
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Old 02-12-2015, 08:29 AM   #4
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It is only that one that is doing it, though. I was wondering if there was a piece missing?
No its just moisture trapped behind it, I think I found more issues on the passenger side, probably because of puddle spray and salt that might be in the puddles. But in either case its normal, which is why I do a bundle of cleaning in the spring.
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Old 02-12-2015, 08:32 AM
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No its just moisture trapped behind it, I think I found more issues on the passenger side, probably because of puddle spray and salt that might be in the puddles. But in either case its normal, which is why I do a bundle of cleaning in the spring.
Guess it's back to the car wash. I hope it's not what caused the center cap to fly off by corroding the metal ring.

Thanks, Dave!
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