10-20-2021, 07:38 PM | #1 |
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front hubs
How long do the front hubs last on the track? I am pretty sure mine are starting to go out as there is a decent amount of bearing like noise when I turn above 40mph. Looks like they are fairly easy to replace judging by the picture of the part.
https://www.turnermotorsport.com/p-5...ub-with-beari/ |
10-20-2021, 08:11 PM | #2 | |
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The M4 GT4 maintenance schedule says 5k miles |
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10-20-2021, 08:11 PM | #3 |
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I plan to do mine before next track season, 45k-ish miles. I don't have any clear symptoms at this point, but bought them (along with 4 required bolts) from FCPEuro so will be able to swap out again pre-emptively down the road for free as I probably will keep the car. Looks like FCP still has them on "discount" at $275 each (vs 317 from ECS)
DIY here: https://f80.bimmerpost.com/forums/sh....php?t=1572940 |
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10-20-2021, 09:02 PM | #5 |
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The 2 screws that hold the rotor on are notorious for seizing up, be prepared with some thread catalyst. My BMW dealer had to drill one out and killed the threads in the process.
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10-20-2021, 09:11 PM | #6 | |
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DSC, you say? Never heard of it
https://youtube.com/@tractioncontroldelete |
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10-21-2021, 06:07 PM | #10 |
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If the frequency of the noise seems rotational (varies with wheelspeed), then very possibly. Could be corroborated with wheel wiggle when corner is in air and trying to induce play when grabbing and pushing tire at 12/6 or 3/9 o'clock positions.
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10-21-2021, 06:30 PM | #11 | |
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Bimmerpost is worse than WebMD...I find myself self diagnosing. Now it's a failing hub and RLS. |
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10-21-2021, 10:07 PM | #12 | ||
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DSC, you say? Never heard of it
https://youtube.com/@tractioncontroldelete |
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10-24-2021, 09:55 AM | #13 |
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Is that the clicking sound I hear driving by walls or when turning hard? Always thought it was the spacers
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10-27-2021, 01:53 PM | #15 |
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So replaced both hubs, and the car is nice and smooth again. I did notice that the driver side hub was pretty notchy. The most annoying part of this process is the torquing the hub bolts 90 degrees post 122Nm torque target.
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12-02-2021, 03:51 PM | #16 |
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I used a standard T60 socket and it worked out fine for me. The difference in the two versions is the thread pitch. I think the older version is 1.5 and the newer one is 1.25. Its suggested that the bolts should also be replaced and not reused.
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12-02-2021, 03:56 PM | #17 |
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I was lazy and I only replaced them after 27k mi and 40+ track days. By the time we took them out, the brake rotors already left some scratch on the calipers due to excessive flex from the hubs.
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12-15-2021, 04:46 PM | #19 |
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12-15-2021, 05:19 PM | #20 |
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12-15-2021, 07:33 PM | #21 | |
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At least that's my plan with the CS! |
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