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  1. #1
    Todd Kenyon
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    wheel bearing or tire noise?

    Noticing a "droning" sound (like big SUV tires) that is clearly speed, not rpm, specific (sounds the same coasting in neutral) in my M5. Swerving the car right increases it, swerving left decreases/stops it. So I assumed I have a bad front left wheel bearing, and have picked up the part to replace it this weekend.

    Thing is, it is not really noticeable at low speeds, and is loudest between 60-65mph. Noise decreases above 65 and below 55 mph, but also has a peak around 40mph. So I am wondering if it could be a tire (Yok ES-100 235/45 17) issue - can't see any obvious tire problems, still decent tread depth. I also jacked up front left and spun/shook wheel but didn't feel anything weird. Sound seems to be coming from front left, but I am not absolutely certain. I am just trying to avoid replacing a perfectly good bearing. So the question is, could it be tire noise, or might it be the rear bearing, or something else I haven't considered? Any input appreciated.


  2. #2
    M30man
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    Yes wheel bearing.

    Definitely sounds like a wheel bearing-put your spare wheel onto front left to prove it !

    M30man

  3. #3
    Bruce in Manhattan Beach
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    Re: wheel bearing or tire noise?



    Some months back I had what I thought was a wheel that had thrown a wheel weight. I was getting vibrations that I knew were not bushings related since the whole front suspension had been replaced and aligned before the new tires hit the road.

    A spin on the balancer showed just a slight change in weight on just one front wheel was needed.

    Still got some shakes back through the steering wheel.

    This time we used that old on-the-car wheel machine and I could not only hear the wheel bearing but could see the wobble even at the relatively slow speed it goes. Like you, just spinning the wheel by hand did not give me a clue to the bearing being bad.

    I opted to replace the bearings on both sides. I figure if one went bad the other is going to give it up soon enough as well.





  4. #4
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    Re: wheel bearing or tire noise?

    My vote is tires. Next time you drive the car when it's cold outside see if the vibration increases or is stronger. Then again when it's hot out..., things should be a bit smoother.

    I've got a 55 - 65 mph vibration that appeared after installing urethan sub frame bushings. For a year I thought the bushings were transmitting pending diff failure noise.., now I'm convinced it's tires transmitted through the urethane bushings. If I go above 70mph the noise is gone.

    There was also a post in Roundel, can't remember which issue but i think two months ago, that vibrations that pop up at 50-55 mph and then disapear at faster speads is usually always tires.

    HTH.

    Philo.
    ------

  5. #5
    KJK
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    Re: wheel bearing or tire noise?

    I have the same problem in my E34 but at 40-50mph. The front tires (S03's) are quite worn so I am going to wait until I replace those. I will say my wife had ES100's on her 323iT and they got LOUD as we put miles on them. 4x4 truck loud.

    Kevin
    '91 M5

  6. #6
    Todd Kenyon
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    Re: wheel bearing or tire noise?

    Yes, I have heard that the Es100s can get loud - I would say mine have at least 1/2 tread left (they came on E39 wheels I bought, will be replaced w/ S03's or PS2's probably next summer). I am probably going to put the spare on front left and see what happens to the noise. If no change, I will swap the bearing. One reason I think it's the bearing is that noise seems to come through the car - if I stick my head out the window I can't hear it very well.

  7. #7
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    Member No: 58225 marinakorp is an unknown quantity at this point marinakorp's Avatar
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    the switch back should confirm your thought

    I would bet that it is the bearings... loading and unloading (switch back) will let you know which one is failing... probably should replace both...


    happened on my 540iT<BR>
    <BR>
    <BR>
    <a>Sport Package, DSP, Xenons, 2 tone BLK/GREY Interior, <br><br>Modifications:
    <br>Powerchip Gold 93,M5 rear sway <br> Shadow Badged, Shadow Chrome Grill, </a>
    <A HREF="http://www.roadfly.org/bmw/gallery/index.php?path=14622,1;-12,1;"

    <IMG SRC="http://www.**********.com/photos/data/502/7767Dyno1.jpg?8601" ALT="short_desc" HEIGHT=233 WIDTH=473 BORDER=0 ALIGN=CENTER></A>
    <BR>


  8. #8
    ilovecow
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    conclusions?

    Anyone come to any conclusions on this topic? I have similar issue and mine's not tires. I recently put on 4 new Pirelli PZero Neros, same thing still happening for me. The grumbling starts around 40, after 55 the engine and wind noises take over. As soon as the needle drops below 40, the noise and vibration are gone.
    Now I think I need some clarification regarding "wheel bearing" vs "wheel hub". I had the rear wheel bearings replaced, obviously that didn't help. When people are referring to bearing, do they mean the REAR wheel bearings, or do they mean the FRONT wheel HUB assembly? I'll replace the fronts if needed, but those are quite expensive and I rather put off if there is another cause to this issue.
    Thanks.

  9. #9
    octobat
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    NOT TIRE OR BEARINGS

    I've had the same problem, recently replaced tires and last week wheel bearings front and back. Still the same noise and vibration.
    Any other suggestions?

  10. #10
    CraigB
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    Re: wheel bearing or tire noise?

    Hey,
    I have heard that some others have had this same problem. One link that came up for me was http://www.bmwtirenoise.com
    Hopefully you can garner some information from that site as well.
    It is odd that these would be shipped out like this.

  11. #11
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    1 out of 1 members found this post helpful. Yes | No

    Um..This is a 3 year old post, we can safely

    assume the problem has been solved, unless he is an extreme procrastinator!

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