04-16-2020, 08:04 PM | #67 | ||
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04-22-2020, 03:01 PM | #68 |
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Alright... calipers rebuilt, hubs replaced, rotors replaced, pads replaced. fingers crossed. He took apart the calipers and determined that likely isn't the problem, more likely it was the hubs, so probably overkill to rebuild the calipers, but figured might as well while he is in there. Will keep you all posted if it fixed the issue.
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04-23-2020, 05:57 AM | #69 | |
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I'll have to check how many miles I've put on mine, but so far I haven't felt anything so still hoping the hubs were the issue.
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04-23-2020, 05:10 PM | #70 | ||
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05-19-2020, 05:38 PM | #71 |
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I just hit around 1300 miles and exiting the freeway, hit the brakes around 50mph......judder......I think I give up at this point. I have no idea what the hell is going on with this car
The last couple of times I've driven the car, I did notice that the steering wheel felt very "jittery", whereas it wasn't like that before. In the numb spot of the steering, when it's dead center, it's like it has some road feedback, where I can feel a slight vibration. And then today the brake judder came back. I'm trying to remember but I'm pretty sure it's done that all of the previous times too. So it's not the rotors, it's not the calipers, it's not the pads, and it's not the wheel hubs. Anyone else have an idea? I can't imagine BMW is going to be real pleased about seeing my car again.
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05-19-2020, 06:00 PM | #72 | |
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05-20-2020, 05:00 PM | #73 | |
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I'm going to keep driving it and see if I can make it any better or if it just gets worse.
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05-20-2020, 05:10 PM | #74 | ||
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05-24-2020, 10:24 PM | #75 | |
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My front tires need replacing fairly soon, and the car definitely needs an alignment (no idea when the last one was) so I'm going to get the fronts replaced and take it in for an alignment this week. Maybe a wheel is out of balance? The previous owner definitely had the front passenger wheel fixed at some point as it's slightly brighter in a few spots from refinishing. He had the wheel/tire warranty from BMW but I would assume they would replace the wheel if it was damaged rather than fix it since it's the shadow edition 666M, but maybe not though. If neither of that improves it then I'll have to take it back. Maybe narrowing down when the vibration happens will help them track down the problem. Not really sure what else could be causing it at this point
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05-24-2020, 10:27 PM | #76 | ||
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05-25-2020, 07:39 AM | #77 |
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Agreed, doesn't make sense that it's only while braking but I'll try it just as something else to eliminate and see what happens.
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05-25-2020, 04:17 PM | #78 |
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There's no way that braking alone, even aggressive and reckless braking at that, can cause those rotors to warp that many times. I definitely think the control arms are something to be looked at as Andrew at ActiveAuto mentions. I too have warped my rotors before, but it took quite a bit to have that happen, and every brake change and inspection after that has been flawless. Alightment is ok?
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05-25-2020, 06:59 PM | #79 | |
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05-29-2020, 06:07 PM | #80 |
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Got the new tires put on the front, wheels balanced fine and weren't out-of-round. Got the alignment done too....no dice. Still shudders from 40-60mph.
I took the car to an independent BMW specialist shop for the alignment (found them on the forum, ABR in Spring....awesome guys!). I talked to one of the managers and techs about the car and what it was doing and just asked if they could take a quick glance at the front of the car when doing the alignment to see if they noticed anything. They even took it for a drive too. They were stumped. I won't be able to get the car to BMW for a couple more weeks, but it'll be going back at some point because I'm at a loss.
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05-29-2020, 06:16 PM | #81 | |
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05-29-2020, 07:59 PM | #82 | ||
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05-29-2020, 10:14 PM | #83 | |
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I agree with this. Ive gone thru 3 sets of factory front pads and rotors, 2 sets of rears, lots of abusive driving and 3 Expert level track days. never a single issue, other than pad deposit. I do a few 150- 45 and over heat the crap out of them and the shutter, shake and vibrations are gone. You can clearly see the with deposit/ without deposit after some good stops.
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05-30-2020, 08:39 AM | #84 | ||
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06-02-2020, 11:56 AM | #85 |
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A bedding procedure done on rotors with uneven deposit will indeed only make it worse.
Cold braking is what will progressively remove uneven deposits.
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06-02-2020, 11:57 AM | #86 |
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Have tried that as well. Drove around for a month with cold brakes normal driving without bedding and that still didn't fix the issue.
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06-02-2020, 11:59 AM | #87 |
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I think it's pretty clear there's something else going on with you car that is causing the uneven deposit. It builds up faster than it wears off.
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06-02-2020, 12:01 PM | #88 | |
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