06-14-2022, 03:13 PM | #177 | |
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If the G30 has more clearance and relies on the clamping forces to resist radial movement, (not sure it should be like this), I can see how the friction disc is helping the accuracy of mounting and reducing vibrations. Still requires care on mounting, clamping accurately and with a good clamping force before taking weight on the wheels. |
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06-16-2022, 03:01 PM | #179 | |
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I think with this type of surface, movements of wheel preventing Waiting to hear your results Alper |
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06-16-2022, 03:45 PM | #180 | |
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The G30 hub spigot is supposed to be 66.5mm and typical rim bores are recorded to be 66.6mm |
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06-16-2022, 03:57 PM | #181 | |
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for the hub spigot, i will mesure them in the same time as mounting friction discs. |
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HighlandPete6658.50 Haradrim35.50 |
06-16-2022, 04:16 PM | #182 | |
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Thinking about this issue, I do wonder if BMW changing the hubs, lug bolt positions (as the technical image I posted above), is having a part to play in allowing more vibrations, if a precision mount is not maintained. |
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Haradrim35.50 |
06-17-2022, 08:18 AM | #183 |
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06-17-2022, 10:29 AM | #185 |
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Hello,
I Received my disc and mounted it on the REAR AXLE and i did my usual test on the highway close to my house : - the vibration decreased slightly, but it still vibrate as usual with an important part from the front axle (i can feel the vibrations on my foot from the gas pedal) So i decided to operate one the front axle : put 2 layer of rubber tape on the front hub spigots and i cleaned the surface contact between the wheel and the hub, on the interior surface wheel, you can remark that there are factory regular scratch , so i took a sand paper and i did some scratch on the hub, to match the wheel 'factory' scratch. i tight the bolt when the wheel was just in contact with the ground, to avoid load constraint on the bolts during the operation. And i did the same highway test in the same conditions : - i can say that there is a great difference : almost smooth driving ! My conclusion is that vibration are coming from front as well from rear The way to mount the wheel affect vibration level |
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06-17-2022, 05:12 PM | #187 |
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06-18-2022, 05:09 AM | #190 | |
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I am very happy to hear that your issues are gone. With the front discs there will be no problem i think. I also ordered 34106884839 via warranty for rears. The fronts are ordered according to my feed backs. My 4 wheels are ready rubber band covered. So know, still perfect results I wanted to ask you these discs put on the part which i shown below? Thank you |
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06-18-2022, 05:43 AM | #191 | |
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- after mounting 2 disc on the rear, slightly decrease, but it was not conclusive, more vibration to the front and still seat vibration - after cleaning the hub and the wheel in the front axle, and add rubber on the hub spigot, significant result I confirm that disc are fitting perfect on the hub. Before put the disk, clean the hub and wheel, no grease or other lubricant ! (some mechanics are used to add grease of the surface contact between hub and wheel) then do some scratch on the hub with 120 sand paper and add the disc and the wheel Tight the bolt a maximum by the hand using a cross, when the wheel is suspended, then lower the crick just to touch slightly the ground and tight to 140NM torque I think if i add disc to the front, the results could be better, but for the moment it's okay (i tested this morning again). |
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Haradrim35.50 |
06-18-2022, 06:54 AM | #192 | ||
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One of my posts from a similar topic for the F10. Quote:
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Haradrim35.50 |
06-18-2022, 07:27 AM | #193 | |
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I think The rubber around the hub helps to reduce the tolerance and improve the centering of the wheel during the mount. The bolt tighting way, order and torque are important too About The disc, they are very thin, 0,1mm, covered with a scratchy surface, it don't help to center the wheel, it only add friction between the two surfaces. i don't know if it is more scratchy than to do it manually on the hub with sanding paper.. |
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HighlandPete6658.50 Haradrim35.50 |
06-18-2022, 07:59 AM | #194 | |
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I also think the need for mounting precision is why some have changed wheel sets and there is little difference, while others have witnessed improvement. But it takes all four wheels to be mounted well, to be rid of the issues, if wheel induced. BMW have always been sensitive to getting the wheel assembly right, (hub, brake disc, rim, tire balance), to eliminate wheel vibrations. Particularly so, as we increase rim diameters. |
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Haradrim35.50 |
06-18-2022, 08:43 AM | #195 | |
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06-18-2022, 10:29 AM | #196 | |
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So in case of my car is under warranty, the discs will mounting at dealer I will give instruction as you applied. I also ordered 2, because dealer still thinks it wont help if its success they will also order for front. I wanted to ask you the disc put on this surface? Keep you updated Thank you Last edited by Haradrim; 06-18-2022 at 10:53 AM.. |
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06-18-2022, 11:03 AM | #197 | |
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Haradrim35.50 |
06-18-2022, 04:11 PM | #198 |
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Thank you, so i think that these disks increase the friction and not permitting any movement on hub or disc surface.
With my investigations, some dealers uses this friction disks for click sound coming from wheelhubs or brakes. So can we think there was a factory based problem on hubs of g30? |
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