strange vibration... - The Unofficial BMW M5 Messageboard (m5board.com)

BMWNTHZST · 28th November 2008, 01:17

I have recently been forced to put the winter tires on due to the cold temperatures of late

. Why do I live in Toronto again...

Ever since the winter wheels were installed I have been experiencing a strange vibration through the steering wheel. I thought perhaps one of the front wheels needed to be rebalanced

.
After spending a quick $20 to have the front wheels rebalanced I still feel the vibration. By the way the vibration is only felt between 80km - 125km.

Is it possible for the rear wheels to cause this vibration through the steering wheel if one of them were out of balance?

I was also wondering about tire wear and rotation...I noticed when I went to install the wheels they were labelled strange. What I mean by this is, it looks as though the wheels might have been rotating the wrong direction during the winter last year. I believe the BMW dealer I had installed the new tires last year put them on the wrong way (ie: rotating the wrong direction)

Your thoughts please.

unfoundhorsepower · 28th November 2008, 01:46

If the tires are directional it will say so or show a direction of rotation on the outside of the tire...
.
.More than likely if your getting a steering wheel shimmy it could be caused by any number of reasons here they are....#1

Improper ballance, or improper ballance job. #2 Bent wheel, they could be ballanced but the wheel could be out dynamically,

making the wheel shimmy....#3 The wheels if they are after market, they might have hub centric adapters for the front and

rear hubs one could be missing. #4 maybe there is a ply seperation and there is a large buble in the thread. Maybe if it

shakes only when you put the brakes on it could be bad rotors....and finally...THE MOST important factor that could cause

this is........improper wheel torque, over tightening of the wheel can warp the hub and the wheel could shimmy....check for

proper inflation too!!! Well good luck...what i suggest is re-torque the wheels and put it up on the lift spin the wheels and

take a look to see if a wheel is bent...

cerb · 28th November 2008, 01:55

vibrations between 80-120 km/h are usually caused by not correctly balanced rear wheels. have them rebalanced and your vibration should be gone.

\cerb

CHRISBURNS · 28th November 2008, 01:57

Or it could just be as simple as they are not centred on the hub correctly.
Although I imagine the wheel shop would have fitted them if they balanced them? If not ensure that there is nothing behind the wheel that would prevent it sitting flush on the hub. I have noticed BMWs seem to build up a lot of crap around where the wheel slips onto the hub so scrape this away and refit the wheel and most importantly tighten the nuts correctly, i.e move to the furthest away nut each time, not the one next to whatever one you are currently one.
Failing all this your wheels are buggered but I cant understand how they balanced if this is the case.

unfoundhorsepower · 28th November 2008, 01:59

Quote:

Originally Posted by cerb

vibrations between 80-120 km/h are usually caused by not correctly balanced rear wheels. have them rebalanced and your vibration should be gone.

\cerb

.
He feels it through the steering wheel......not the rears............

unfoundhorsepower · 28th November 2008, 02:03

Quote:

Originally Posted by CHRISBURNS

Or it could just be as simple as they are not centred on the hub correctly.
Although I imagine the wheel shop would have fitted them if they balanced them? If not ensure that there is nothing behind the wheel that would prevent it sitting flush on the hub. I have noticed BMWs seem to build up a lot of crap around where the wheel slips onto the hub so scrape this away and refit the wheel and most importantly tighten the nuts correctly, i.e move to the furthest away nut each time, not the one next to whatever one you are currently one.
Failing all this your wheels are buggered but I cant understand how they balanced if this is the case.

.
Chris hub centric rings might be missing if they are after market wheels.....allready said it...thanks

BMWNTHZST · 28th November 2008, 02:03

I can rule out the bent wheel as they are brand new and it's not the rotors as I don't have any issue when the summer tires are on.

I just checked the wheel torque and tire pressure, all is perfect!

I don't see any bubbles in the treads or on the side walls.

I guess the only thing left to do is have all four wheels rebalanced again and hope for the best.

Is it possible that the tires are no good anymore due to spinning the wrong direction for approx 7,500km ?

cerb · 28th November 2008, 02:08

Quote:

Originally Posted by unfoundhorsepower

.
He feels it through the steering wheel......not the rears............

believe me ... it's the rear wheels

\cerb (still braking in ... can't wait to step on it)

CHRISBURNS · 28th November 2008, 02:10

Gez I would be really pissed with the dealer, and pretty hard case to argue a year later!
Dont know about damage to the tyre, I have done it on several cars and it never made a difference.
Did you keep the tyres inflated during the year when not in use?

CHRISBURNS · 28th November 2008, 02:11

Quote:

Originally Posted by cerb

believe me ... it's the rear wheels

\cerb (still braking in ... can't wait to step on it)

HeHe cerb you seem pretty sure! Love the new car by the way.