[Dougdoescars]

So my auto broker sold me a CPO M Sport 435i for a killer deal but the only issue was it did accumulate rust on the rear rotors and brake calipers while being at the dealership...anyone have any clue on how to get rid of it? I'm probably gonna swap out the rotors when its time for new brake pads anyways but my calipers are what I'm more concerned about...listed below are some pictures

[GTBrandon]

I would put on jack stands, take off the wheel, then hit it with some chemical guys diablo wheel gel and agitate with a detail brush. Never seen it get that bad though, wonder if dealership will replace considering CPO and possibly unsafe amount of rust that close to break pads and components.

[Dougdoescars]

Originally Posted by GTBrandon

I would put on jack stands, take off the wheel, then hit it with some chemical guys diablo wheel gel and agitate with a detail brush. Never seen it get that bad though, wonder if dealership will replace considering CPO and possibly unsafe amount of rust that close to break pads and components.

The car came from ~60 miles from where I am but I took it to the BMW nearest to my house and they said it's just a cosmetic issue which isn't covered under CPO so theres that :/

Maybe I'll try calling the dealership it came from and see what they say about it...

[GTBrandon]

Originally Posted by vincenttngo1

The car came from ~60 miles from where I am but I took it to the BMW nearest to my house and they said it's just a cosmetic issue which isn't covered under CPO so theres that :/

Maybe I'll try calling the dealership it came from and see what they say about it...

I would get friendly with a service advisor, and then see if they can do it for you. Badgering the dealership probably won't help for something small like this, especially if you'll need to go back in the future. I would formulate a reason why the rust would affect breaks performance or longevity.

[ErkanTR16]

Try using Iron X Remover.

[mineral_f30]

Originally Posted by Erkan_340i

Try using Iron X Remover.

I wouldn't.

http://www.autogeek.net/carpro-iron-x-cleaner.html

"Note: Iron X should not be used on bare metal parts, brake calipers, wheel balancing weights, or SMART paint repairs. Mask off these areas. Avoid letting Iron X dry on any surface."



Just use a wire brush to remove loose rust and then paint silver or black with rust paint using a small paint brush. I've done it before on several occasions. Problem solved.

http://www.waxforum.com/showpost.php...8&postcount=16

[bimmer456]

Must've been kept outside in the rain and snow to get that bad. There isn't anything on the actual contact surface which indicates it was being driven regularly. Just need to get it clean and check for any corrosion to the brake lines and calipers that may need attention. Maybe something from chemical guys. The dealer should clean it if you haven't taken delivery yet.

[Busa1]

Originally Posted by vincenttngo1

So my auto broker sold me a CPO M Sport 435i for a killer deal but the only issue was it did accumulate rust on the rear rotors and brake calipers while being at the dealership...anyone have any clue on how to get rid of it? I'm probably gonna swap out the rotors when its time for new brake pads anyways but my calipers are what I'm more concerned about...listed below are some pictures

[IMG]http://i64.tinypic.com/2n6s00x.jpg[/IMG]
[IMG]http://i64.tinypic.com/r9ob3o.jpg[/IMG]

Just bring it some place to get them painted

[Zermatt]

Wow. Looks like it got a layer of salt or another type of chloride that accelerated the oxidation and was never washed off.

[Billfitz]

Originally Posted by Busa1

Just bring it some place to get them painted

Or do it yourself. Mine looked about like that on my last car, but it was seven years old. I pulled the rotors and calipers, cleaned them up with a wire brush, painted the hubs and calipers with caliper paint.
Having learned that lesson I put this on my new car's hubs and rotors, so far no rust.
https://www.amazon.com/Wipe-New-WW6P...+dust+defender

It works very well on the wheels too.

[bimmer456]

The BMW center cap is also upside down on the last photo. The M should always be opposite the letters BMW, so they need to fix that and the rust issue and get it recertified. Isn't rust coverage for the life of the vehicle?

[Noelified]

I don't recall you mentioning the year and I could be wrong because M-sport has so many options now....but those look like standard calipers and not M sport calipers?

[bimmer456]

Originally Posted by Noelified

I don't recall you mentioning the year and I could be wrong because M-sport has so many options now....but those look like standard calipers and not M sport calipers?

It's possible M sport calipers weren't on some models, or it could just be the rims are m sport.

[Dougdoescars]

Originally Posted by Noelified

I don't recall you mentioning the year and I could be wrong because M-sport has so many options now....but those look like standard calipers and not M sport calipers?

Originally Posted by bimmer456

It's possible M sport calipers weren't on some models, or it could just be the rims are m sport.

its a 2014 M Sport 435i, I thought by now they all came factory with the blue brakes but I guess mine didn't? I'm not sure but I wish it did

Thinking of just going in and painting the calipers either black blue or silver, what do you guys think?

[Noelified]

Yes paint the calipers. I did and am totally happy with it. I'll post pics later tonight. I used G2 caliper paint found on Amazon. One kit easily painted 3 coats on each caliper and I had some left over. It's actually epoxy and not paint so it withstands heat and abrasion much better. Also, and this might sound odd, but being a brush on application made it much easier. No need to mask off and worry about overspray. You also build up a nice thick layer and its high gloss. You just need to be very patient and take your time. It's also easier if you are able to jack stand your entire car and have all four wheels off at the same time. That will make all the difference. Since it is epoxy and not paint, it cures from chemical reaction and not evaporation of solvents. From time of mixing to cure is about 4 hours then it's too thick to brush on and is pretty much curing. So in all plan a weekend when you can lift the car, spend a good time cleaning the calipers. Then brush on one caliper at a time and by the time you finish the fourth caliper (15-20 minutes) the first caliper has cured enough for the second coat, and so on. Then don't drive for at least 8 hours. i would recommend at least 3 coats there is enough for 4. I'll post pics later, it totally worth the effort.

[Noelified]

Yes paint the calipers. I did and am totally happy with it. I'll post pics later tonight. I used G2 caliper paint found on Amazon. One kit easily painted 3 coats on each caliper and I had some left over. It's actually epoxy and not paint so it withstands heat and abrasion much better. Also, and this might sound odd, but being a brush on application made it much easier. No need to mask off and worry about overspray. You also build up a nice thick layer and its high gloss. You just need to be very patient and take your time. It's also easier if you are able to jack stand your entire car and have all four wheels off at the same time. That will make all the difference. Since it is epoxy and not paint, it cures from chemical reaction and not evaporation of solvents. From time of mixing to cure is about 4 hours then it's too thick to brush on and is pretty much curing. So in all plan a weekend when you can lift the car, spend a good time cleaning the calipers. Then brush on one caliper at a time and by the time you finish the fourth caliper (15-20 minutes) the first caliper has cured enough for the second coat, and so on. Then don't drive for at least 8 hours. i would recommend at least 3 coats there is enough for 4. I'll post pics later, it totally worth the effort.

[Billfitz]

Originally Posted by bimmer456

Isn't rust coverage for the life of the vehicle?

Rust coverage applies to the body sheet metal.

[bimmer456]

Originally Posted by vincenttngo1

its a 2014 M Sport 435i, I thought by now they all came factory with the blue brakes but I guess mine didn't? I'm not sure but I wish it did

Thinking of just going in and painting the calipers either black blue or silver, what do you guys think?

Some of the earlier M Sport cars didn't even come with SAT, how is that M Sport LOL? An M Sport car should always have paddles and the nicer steering wheel. There are folks on here who upgraded the steering wheel and coded SAT, and it should be possible to upgrade the calipers, not sure if the only difference is that they're blue with the M Logo, but let us know how it turns out once you do it.

[Dougdoescars]

Originally Posted by Noelified

Yes paint the calipers. I did and am totally happy with it. I'll post pics later tonight. I used G2 caliper paint found on Amazon. One kit easily painted 3 coats on each caliper and I had some left over. It's actually epoxy and not paint so it withstands heat and abrasion much better. Also, and this might sound odd, but being a brush on application made it much easier. No need to mask off and worry about overspray. You also build up a nice thick layer and its high gloss. You just need to be very patient and take your time. It's also easier if you are able to jack stand your entire car and have all four wheels off at the same time. That will make all the difference. Since it is epoxy and not paint, it cures from chemical reaction and not evaporation of solvents. From time of mixing to cure is about 4 hours then it's too thick to brush on and is pretty much curing. So in all plan a weekend when you can lift the car, spend a good time cleaning the calipers. Then brush on one caliper at a time and by the time you finish the fourth caliper (15-20 minutes) the first caliper has cured enough for the second coat, and so on. Then don't drive for at least 8 hours. i would recommend at least 3 coats there is enough for 4. I'll post pics later, it totally worth the effort.

Yes please post some pictures up! Would love to see how it turned out on your car I think that what I'm probably going to do this weekend.

Originally Posted by bimmer456

Some of the earlier M Sport cars didn't even come with SAT, how is that M Sport LOL? An M Sport car should always have paddles and the nicer steering wheel. There are folks on here who upgraded the steering wheel and coded SAT, and it should be possible to upgrade the calipers, not sure if the only difference is that they're blue with the M Logo, but let us know how it turns out once you do it.

What exactly is SAT? Yeah I read around and saw that people did make the switch, seems to make no sort of performance improvement and is about 650 a caliper, so its definitely not worth it, hence why I'm probably just going to be painting.

[bimmer456]

Originally Posted by vincenttngo1

Yes please post some pictures up! Would love to see how it turned out on your car I think that what I'm probably going to do this weekend.



What exactly is SAT? Yeah I read around and saw that people did make the switch, seems to make no sort of performance improvement and is about 650 a caliper, so its definitely not worth it, hence why I'm probably just going to be painting.

SAT stands for Sports Automatic Transmission. You get paddle shifters on the steering wheel, which should be standard on M Sport but wasn't until recently.

[Dougdoescars]

Originally Posted by bimmer456

SAT stands for Sports Automatic Transmission. You get paddle shifters on the steering wheel, which should be standard on M Sport but wasn't until recently.

Oh gotcha! Wow I didn't know that, I'm glad mine came with paddle shifters. Now that I think about it, my '13 M Sport 328i did not come with paddle shifters, but it did have everything else (steering wheel, body kit, etc.). How strange.

[Noelified]

I've attached images hopefully they come through. Never posted pics before. First pic is all four wheels off and on jack stands. You can see I removed the BMW labeled spring clips and clear coated them with VHT high temp clear. Last pic is the leftover I created a gag since its epoxy and cures solid.