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Whining noise coming from front left

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by smokeGTI, Nov 15, 2023.

  1. smokeGTI

    smokeGTI Member

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    Hi all,
    My wife's 2007 gen2 started making whining noise apparent 40km to 80km with slightly pitch change.
    It's more pronounce when making right turn. but noise was gone when making left turn.
    it making the noise like a bad fan motor.

    The car has done 82kkm only. CV boots are fine and no leak, brake pads are like 35% remain.
    So I have the left front wheel bearing replaced. But the noise still the same no change.
    Then I replaced ATFWS since it's due anyway, But the noise still there.

    Any idea of what else to check?

    Tnanks
     
  2. dolj

    dolj Senior Member

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    Do you mean 82 Mm?
     
  3. Tombukt2

    Tombukt2 Senior Member

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    Has anyone put the car on jack stands and driven it while the car is not moving front tires spinning no not a hundred miles an hour reasonable stand outside and look at the car while someone's sitting in the car with it in drive not flooring the gas not trying to kill the car just the tires turning then you can get out and be outside and listen look eyes go to the sound so on and so forth No don't put your hands on the turning wheels . Now what do you got what do you see?
     
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  4. Tombukt2

    Tombukt2 Senior Member

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    A dyno could do similar but you have to pay to strap the car to a dyno and what's the point for a Prius. Some call it a rolling road
     
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  5. smokeGTI

    smokeGTI Member

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    Thanks for the inputs, will try it this weekend, hopefully the abs won't stop it from spinning.
     
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  6. Tombukt2

    Tombukt2 Senior Member

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    That's not how ABS works unless you slam on the brakes your wheels will turn You can even give it a little bit of gas very little or you have someone sit in the car while you're outside the car listening I have the parking brake applied and make sure it's on jack stands that it won't fall off of The person in the car doesn't need to be gunning it like he's going to the drag strip just a steady roll of the front wheels then a little more than a little less a little more and a little less and see why that's going little more and little less Do you hear the whining noise you're looking for now try to pinpoint it your eyes will want to go straight to the noise.
     
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  7. smokeGTI

    smokeGTI Member

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    I have a friend who's a car mechanic, he test drove it, although it sounds like coming from the left side,
    and suggest me to replace the right front bearing as well,
    he said that they normally replace both sides at the same time.
    Just have the right one replaced today, no more noise, thank you
     
  8. Tombukt2

    Tombukt2 Senior Member

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    Yes when I do wheel bearings front brakes rear brakes any of that I do the axle both sides struts do the axle both sides shocks both sides You want the car to brake compress and expand equally. Via your suspension and corners of your vehicle tires too usually done in pairs at least if not all four but at least the two on the one axle. Now when I was real poor and real young I was regularly changing a tire so on and so forth but anything that came in pairs like brake pads I usually put them on the two wheels in the same instance it's just the way you do generally speaking a financials limit that then you've got to do what you got to do It's not going to hurt you but then keeping up with things on a cars kind of difficult enough as it is remembering brake pads from one side to the other things like that might get tricky at best but then back in those days I ran brake pads until they started to make the metal grading noise I mean just when it starts hadn't even really scored the rotor yet it made the sound one time pull over slide in new pads.
     
  9. PaulRivers

    PaulRivers Member

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    Mine was the whole wheel bearing assembly thing. Not entirely sure it's the same thing - mine made a noise like jeep tires.

    Got them replaced on both sides -$1,500 for both - noise went away.