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Weird noise under the hood, any help

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Noop, Jun 22, 2018.

  1. Noop

    Noop New Member

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    Hello everyone, any sorry for ur time :)
    I posted a video here months ago about weird noise under the hood (passenger side unde the motor) , and i tried to record it with som poor video quality,
    Now its much persistent and louder so i took this video , and i hope its clear this time


    It starts when the engine kicks in and stays at idle, and go away when i press the throattle. I tracked it to the passenger side just beneath the motor.
    I visited couple of mechanics and they offered to take the motor apart as they cant figure out what is it coming from exactly

    Any help will be appreciated and thanks every one
     
    #1 Noop, Jun 22, 2018
  2. bisco

    bisco cookie crumbler

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    how many km on her?
     
    #2 bisco, Jun 22, 2018
  3. Noop

    Noop New Member

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    81k mile , 2011 prius
     
    #3 Noop, Jun 22, 2018
  4. bisco

    bisco cookie crumbler

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    seems too young for engine problems. maybe start with the egr circuit and intake manifold. does she burn any oil?
     
    #4 bisco, Jun 22, 2018
  5. Noop

    Noop New Member

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    No it doesn’t burn oil, and there are no warning lights appears on the dash
     
    #5 Noop, Jun 23, 2018
  6. Mendel Leisk

    Mendel Leisk Book Cover Judge

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    Timing chain, that runs between the crank shaft and the two cam shafts at the top, is in there, behind a cover. it has tensioners and what not.

    I would hold off; the cure could be worse than the condition. Timing chain cover seal and reinstall is VERY tricky, and in tight quarters. Just monitor for a while longer.
     
    #6 Mendel Leisk, Jun 23, 2018
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  7. padroo

    padroo Senior Member

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    Mendel could be on to something. Some cars with long timing chains use hydraulic oil pressure to apply tension to the timing chain. I did one many years ago and all it was was a piece of dirt clogged a small orifice not allowing the tensioner to work.
     
    #7 padroo, Jun 23, 2018
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  8. Andyprius1

    Andyprius1 Senior Member

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    Which motor. ???????
     
    #8 Andyprius1, Jun 23, 2018
  9. bisco

    bisco cookie crumbler

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    maybe try a different weight oil?
     
    #9 bisco, Jun 23, 2018
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  10. Andyprius1

    Andyprius1 Senior Member

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    or heavy water?
     
    #10 Andyprius1, Jun 23, 2018
  11. Mendel Leisk

    Mendel Leisk Book Cover Judge

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    Save that for the Ford Fusion.
     
    #11 Mendel Leisk, Jun 23, 2018
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