|
|
06-10-2021, 06:37 AM | #1 |
Private First Class
58
Rep 122
Posts |
Road vibration
Hi guys, I recently bought new tires, re straightened the rims, did a wheel alignment and balancing, but the car at speeds between 50/60 mph vibrates on the highway. Under 50 or over 70 car drives great! It's just in that speed window that happens. Car is sitting at 104k miles. Any ideas of what if could be? Thank you guys for the help.
|
06-10-2021, 02:06 PM | #2 |
First Lieutenant
109
Rep 372
Posts
Drives: 16 X3 28d/18 540d xdrive
Join Date: Jun 2017
Location: Western PA
|
What you're describing seems a lot like a bent wheel or wheels. I recognize that you mention "re straightening the rims", but were able to see them spun on a wheel balancer? It doesn't take much to create problems at certain speeds.
|
Appreciate
1
otay826.00 |
06-10-2021, 02:26 PM | #3 |
Captain
150
Rep 964
Posts |
On another car, I had to bring my wheels to the balancer 3x. On the third time, the person said the tire had a flat spot which made it more challenging to balance. Possibly from autocross.
|
Appreciate
0
|
06-13-2021, 10:47 AM | #4 |
Major
826
Rep 1,342
Posts |
I'm having the same.
Took it to Discount Tire for balancing, it was a bit better, but still there (around 75 mph). Took it back, they said they thought both driver-side wheels were out of round/bent, and recommended new wheels. I specifically went to DT because they advertise road force balancing, but for whatever reason, they didn't use it the 1st time. ?? Not being ready to drop a couple thousand on new wheels and tires (I really like the OEM 351 double-spoke wheels, and 2 of the Pirelli run-flats were brand new when I bought the car), I decided to find a different shop. The 1st time at the new shop, which also has road force balancing and advertise they can straighten wheels, they said the front driver's side wheel was definitely bent. They charged $150 for straightening the wheel, and did a road force balance on all 4. Still had very similar vibration issues, it might have been a tiny bit better. So took it back again, where it's waiting to be looked at by the expert who straightened the one wheel. Apparently, he is at a different location, and they only took the one wheel over, this time he will check all of the wheels. Maddening! |
Appreciate
0
|
06-14-2021, 09:31 AM | #5 | |
Captain
150
Rep 964
Posts |
Quote:
|
|
Appreciate
0
|
06-14-2021, 06:57 PM | #6 | |
Major
826
Rep 1,342
Posts |
Quote:
Follow up on my story...the shop says their wheel "expert" who does the rim straightening found no other wheels bent, but did do a roadforce balance again on all 4 and said 2 of the other wheels needed balancing. They said they're not sure why the balance machine at the original location didn't get it right. Guess this ain't an exact science... My theory is that because run-flat tires weigh more, they magnify any balance issues. ? Anyway, went for a quick spin on the highway and it's definitely better. |
|
Appreciate
0
|
06-14-2021, 08:40 PM | #7 | ||
Private First Class
58
Rep 122
Posts |
Quote:
|
||
Appreciate
0
|
06-30-2021, 12:27 PM | #8 | |||
Lieutenant
130
Rep 452
Posts |
Quote:
|
|||
Appreciate
0
|
07-16-2021, 01:35 PM | #10 |
Private First Class
126
Rep 194
Posts
Drives: F87 M2
Join Date: Dec 2020
Location: Kirkland, WA
|
You may want to check on your control arm bushings to see if they have worn? I had an old E39 that had a vibration no matter how many balances I had performed even after a remount of new tires. They found that the bushings were worn and that the vibration is a symptom. YMMV
However, I have worn control arm bushings on my F10 550ix (as indicated by my dealer) and I have no vibration issues at all. I have MPS A/S 3 non run flats on my stock 18" wheels for reference. Last edited by J-Pizzle; 07-16-2021 at 03:12 PM.. |
Appreciate
0
|
12-28-2021, 09:51 PM | #11 | |
Private First Class
58
Rep 122
Posts |
Quote:
|
|
Appreciate
0
|
12-28-2021, 10:40 PM | #12 | |
Captain
496
Rep 780
Posts |
Quote:
Was it the Tension Strut pair (31126775971 & 31126775972) $253 each, or the wishbone, bottom pair (31126794203 & 31126794204) $304 each? Why are these so much cheaper, (31122450815 & 31122450818) $186 each, and (31122450813 & 31122450814) $233 each, that includes bolts and nuts? Last edited by M_Bimmer; 12-28-2021 at 11:08 PM.. |
|
Appreciate
0
|
12-29-2021, 07:11 AM | #13 | ||
Private First Class
58
Rep 122
Posts |
Quote:
|
||
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|