03-09-2013, 11:04 AM | #1 |
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Brake discs
Just noticed I seem to have orange gunk all over one of my rear brake discs, the other three are perfectly fine. Any idea what it could be?
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03-09-2013, 12:46 PM | #4 |
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I've not used mine for 3-4 weeks and there is not a spot of rust on the discs. I've left it on the street to be assailed by the elements and it's bearing up very well. Even looks clean even though it has never been washed. Tough beauty.
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03-09-2013, 12:51 PM | #5 |
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You have pics? It has been raining up north here, could that be the cause of the "rust"?
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03-09-2013, 12:54 PM | #6 |
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It has rained here too. If I left my GTI for more than 2-3 days in the rain, the discs would have light rust. Part of the course. So, my F30 is a bit unusual.
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03-09-2013, 01:00 PM | #7 |
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Certainly my E46 and other cars I have noticed when in the car park at work, after it has rained, I could almost guarantee in the evening when going home i would see rust spots on the discs. But these would dissapear after light driving.
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03-09-2013, 01:21 PM | #8 |
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its in where the wheel bolts to the hub, the disc and the hub have no coating any moisture and it rusts, does look like orange spots when it comes out, i took the wheels off treated it then painted it to cure it, another cost cutting job by bmw
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03-09-2013, 03:40 PM | #9 |
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Did you use the Bilt Hamber gel for the rust and what all did you paint and did you spray as will will have the wheels off to Ceramic coat when I get it, thanks Derek
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03-10-2013, 03:59 AM | #10 |
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No pics, I should have taken one, covered in snow now! Rear right disc is like someone has poured Fanta over it! It's not spots it's like liquid. Other three are fine.
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03-10-2013, 05:23 AM | #12 |
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03-10-2013, 06:06 AM | #14 |
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I think they are getting at hub part used to come painted but know bare metal so rusting quick and dripping onto disk , after I way my car I run up drive and dab brakes then into garage saves the rust on disks
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03-10-2013, 06:11 AM | #15 | |
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But yes, I also roll mine forward too with brakes on to clear the rust after washing. Sticks the pads to the disc otherwise. |
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03-10-2013, 06:17 AM | #16 |
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That's great news I forgot about the alloy bells mentioned in another thread re weight of performance brakes glad I speced know one less job to do, aye the brakes did stick bad if I forgot to give it a run great minds think alike
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03-10-2013, 06:38 AM | #17 | |
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leaving the rust in there speeds up the corrosion of the alloy wheel, copperslip on the surfaces and bolt threads before the wheels went back on
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03-10-2013, 06:43 AM | #18 | |
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03-10-2013, 07:28 AM | #19 | |
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03-10-2013, 07:51 AM | #20 | |
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03-11-2013, 05:53 AM | #22 |
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IT'S just surface rust will go after every brake use, more pronounced on the Sport upgraded brakes, mine rust every week gone in flash as I brake, no worries
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