2008 Prius Noise follows speed

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Sam Espich, Feb 22, 2020.

  1. Sam Espich

    Sam Espich New Member

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    It sounds like a rrrring noise. Almost like a loud engine.
    It follows the speed of the car. So louder and louder as the car goes faster.
    Sound seems to be coming from the front center of the car.
    We have had both front bearings replaced.
    I uploaded the mp3 file and linked it in a PDF.
    Thanks!
    Sam
     

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    #1 Sam Espich, Feb 22, 2020
    Last edited: Feb 22, 2020
  2. JC91006

    JC91006 Senior Member

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    have you checked your tires? Make sure they are not worn and bumpy?
     
  3. Sam Espich

    Sam Espich New Member

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    I did look at the tires. What would I be looking for. They look "Normal". The rear tires look a bit more worn on the outer edge then the front. But they don't look bumpy or "cupped"
    Thanks for the reply.
     
  4. JC91006

    JC91006 Senior Member

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    Noises that get louder with speed are usually associated with bad bearings and tires. If it's a bearing, the noises can change as you turn the steering wheel.

    The tires should be inspected with the car raised off the ground. Then take a good look, even slight uneven wearing on the tire will make a tire noisy when you're at speed.
     
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  5. ericbecky

    ericbecky Hybrid Battery Hero

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    Some tires get much louder with age.
    Loud enough that you might think it is a bearing issue.

    Do you have anyone else you can swap tires/rims with as a test?
     
  6. SFO

    SFO Senior Member

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    You may also want to try swapping the front and rear tires, then see if the suspect noise changes location.

    When jacking up the front wheels, check for bearing wobble or movement by holding the outer edge of the tire at 9 and 3 o'clock, then push/pull on opposite sides, creating a shaking motion. There should be no play in the bearing when doing this, short of the front wheels trying to turn left or right, which is why you would also verify this again at 12 and 6 on the wheel.

    How many miles ago were the bearings done?

    Did you replace the two (2) front bearings with OEM, or something else?
     
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  7. ericbecky

    ericbecky Hybrid Battery Hero

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    I just had a New aftermarket bearing fail within a month of being installed. Very strange.
    Got a replacement since it was under warranty, but still very annoying
     
  8. Sam Espich

    Sam Espich New Member

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    All good information thank you!
    The bearings were changed out 2 months ago which didn't "fix" the problem.

    I think in the morning I'll try swapping the front tires to the back and see if that makes a difference.

    The noise is kind of like a single engine prop plane if you've ever ridden in one of those...not a "growl" like i've heard when i've had bearings go out on other cars.
    Thanks,
    Sam
     
  9. ChapmanF

    ChapmanF Senior Member

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    Looking back through the archives ... "distant Cessna" was what one of my wheel bearings sounded like in my old Gen 1.

    That one was a puzzler ... none of the ways worked that people normally recommend for figuring out which bearing it is. Attaching a ChassisEar at all four bearings and going for a drive picked out the failing one in seconds flat, though.
     
    #9 ChapmanF, Feb 23, 2020
    Last edited: Feb 23, 2020
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