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E91 LCI X-drive vibrations
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07-15-2018, 02:33 PM | #1 |
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E91 LCI X-drive vibrations
Hello,
my English is not the best, but I'll try to explain my problem with my '09 330d Xdrive. When I bought the car, there was small feelable vibration in steering wheel over 60mph. It gets worse over 70mph. What causes the vibration? I balanced the wheels, one wheel was a bit warped, but not that much it will cause the vibration. I changed both front CV axles, didn't make any diffrence. The front drive shaft is without any play, even drove without the front driveshaft. Vibration is still there. What should I check next? Regards. Last edited by Lovvi; 07-15-2018 at 03:09 PM.. |
07-15-2018, 02:47 PM | #2 |
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bushings.
suspension geometry changes will do weird things. I would also look at the front driveshaft. maybe even drop it and take it for a drive to see if there's changes. and swap the tires front to rear for troubleshooting. Your bent wheel may be the culprit. |
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07-15-2018, 03:11 PM | #3 |
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The steering wheel holds about 3/4 inch to the right also if I drive on highway, if this makes the troubleshooting better.
I drove without the front driveshaft, the vibration was still there. Last edited by Lovvi; 07-15-2018 at 03:20 PM.. |
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07-16-2018, 07:27 AM | #4 | |
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07-16-2018, 09:04 AM | #5 |
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You need a wheel alignment if that's the case. Do that first, and then take it from there...
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07-16-2018, 09:23 AM | #6 |
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07-16-2018, 11:48 AM | #9 |
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07-16-2018, 11:49 AM | #10 |
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07-16-2018, 12:01 PM | #11 |
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Make sure you do a 4 wheel alignment. They need to start on the rear on the xdrive, as (believe it or not), the rear can dynamically affect the front geometry...
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07-17-2018, 11:04 AM | #12 |
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There is no play in steering rack and no leaks.
Haven't had time to do the alignment. Going to do it tomorrow if I have free time and I will update. Most of the time you need to start from the rear, because the alignment bench calculates the front camber etc from the rear wheels. |
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07-26-2018, 03:42 PM | #13 |
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I would check wheel balance. Vibration that increases with speed is a textbook wheel balance issue. I've also heard people say that since our BMWs run high caster, we're more likely to feel wheel imbalance. I'm not sure on the physics there, but whatever it is, I have noticed that BMWs are more sensitive to wheel balance, so maybe caster is the answer.
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07-27-2018, 02:20 PM | #14 |
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This too ^^
I had to balance my front wheels twice to get rid of some annoying vibration felt around 65 Mph.. Had to go to a newer, more precise machine. |
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08-08-2018, 12:04 PM | #15 |
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I have rebalanced the wheels many times, even tryed Style 95 wheels, still the same vibration. Did wheel alignment, didn't make any difference.
By the way, when braking the steering wheel doesnt shake anymore, when I let off the brake then it starts shaking/vibrating again. |
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08-17-2018, 09:11 PM | #17 |
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BMW shipped sport package 330xi and 335xi cars with a staggered setup from the factory. My 330xi has it - same setup as OP. The overall tire diameter needs to be within 1% (or something like that). If nothing else, to accommodate tire wear.
PS - where did you go to get your wheels balanced properly near Newton? With all the potholes, it seems impossible to keep them balanced anyway! |
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09-06-2018, 08:20 AM | #18 | |
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09-25-2018, 09:22 PM | #19 |
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Thanks for the tip! I've seen him recommended on Facebook, but never by someone that seemed like an enthusiast. Will have to check him out.
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