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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > Rust under center wheel cap

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      11-19-2018, 01:42 PM   #1
thaalrasha
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Rust under center wheel cap

Someone stole one of my center wheel cap (the bmw logo in the center of the alloy wheel)...

That revealed a fair amount of rust where the center axle meets the center of the wheel alloy... I'm just wondering if that is something to worry about or just ignore...

While the center caps are tightly in place i don't think it's meant to be... water tight or anything... ? Should I worry about it ?
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      11-19-2018, 02:05 PM   #2
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Just ignore as the hub spigot is steel and steel rusts. It's going rust to depend on your part of the world, winter, humidity, ect. Maybe in the desert or Calfornia you can go a long time without getting rust there but most other places it's hard to avoid.
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      11-19-2018, 02:28 PM   #3
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Take the wheel off, apply a wire brush to the bits where the wheel touches the hub and vice versa, then smear with copper slip and refit the wheel.

HTH
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      11-19-2018, 02:30 PM   #4
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Separately. Those things only come out without damage if hit from behind by a blunt object.

Have you considered going for a drive with your jacket turned inside out? I'm not sure what you did, but it might help...
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      11-19-2018, 02:59 PM   #5
thaalrasha
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Thanks for your insight guys. I'm in a country where it rains 340 days a year so i suppose it's prone to more rust than California ^^ I'll need to change the rear tires soon anyway since those tend to wear down fast for some unknown reasons
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      11-19-2018, 03:25 PM   #6
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Quote:
Originally Posted by thaalrasha View Post
Someone stole one of my center wheel cap (the bmw logo in the center of the alloy wheel)...
For what its worth, it's probably more likely that it simply fell out, not that someone stole it. These things can get loose over time.
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      11-20-2018, 04:43 PM   #7
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Doubt anyone stole it, they are ridiculously difficult to remove without taking the wheel off. It probably just fell out.

Like others have said the rust is unavoidable so no sense in fighting it. Just replace the cap and you won't see it.
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      12-10-2018, 01:11 PM   #8
pruettfan
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Since you live in a climate with lots of moisture it would be good to at least once a year take the wheels off and as stated hit those hubs with a wire brush. The rust can really build up and make the wheels really hard to remove. I have had to pound the rear wheels off my 3 series because of the rust and I live in one of the driest climates in the USA .
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      03-31-2019, 02:43 PM   #9
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Has anyone cleaned the rust off the hub and painted it to prevent future rust? I'm going to be running wheels without center caps and want to avoid this eyesore.
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      04-01-2019, 11:11 AM   #10
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Quote:
Originally Posted by thaalrasha View Post
Thanks for your insight guys. I'm in a country where it rains 340 days a year so i suppose it's prone to more rust than California ^^ I'll need to change the rear tires soon anyway since those tend to wear down fast for some unknown reasons
Haha cool name, d2
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      04-04-2019, 06:49 AM   #11
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Quote:
Originally Posted by Natek View Post
Has anyone cleaned the rust off the hub and painted it to prevent future rust? I'm going to be running wheels without center caps and want to avoid this eyesore.
I did this to mine but only yesterday so it'll be a while before I can report anything.
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      04-06-2019, 08:54 AM   #12
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Quote:
Originally Posted by pruettfan View Post
I have had to pound the rear wheels off my 3 series because of the rust and I live in one of the driest climates in the USA .
If you apply anti-seize compound to the wheel and hub that'll eliminate the problem.
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      04-13-2019, 07:40 PM   #13
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Quote:
Originally Posted by Pyrat 2 View Post
If you apply anti-seize compound to the wheel and hub that'll eliminate the problem.
Yes, this is what I do.
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      04-20-2019, 09:01 PM   #14
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BMW doesn't believe in coating the hubs just like when they stopped coating the brake parts years ago. My hubs were bleeding rust with only a couple hundred miles so like all my other BMWs I took care of it. I also do the vents.
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