Intermittent engine rattle

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by prnico, Oct 3, 2020.

  1. prnico

    prnico Junior Member

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    Hello,

    Can anyone please help me identiffy the source of the engine rattle which you hopefully can make out in the video I've posted below? It's an intermittent lower-pitched rattle and in the video it stops after about the 17 seconds mark. I've read several threads here mentioning heat shields. I would say the noise is coming from somewhere in the left of the engine compartment if you're standing in front looking towards the back of the car. In the video it's during warmup after first turning on the car but it also happens at other random times when I'm driving. I haven't identified a specific ICE rpm which triggers it. The car has done about 200,000 km, engine oil level is ok and is otherwise working well.

    https://mega.nz/file/D5p2CRbC#MZqX-_A5HJZ6csUHAdBXlUMo9iSAlq6DnehR2r4Qkm8

    Thanks for any pointers.

    Nicholas.
     
  2. bisco

    bisco cookie crumbler

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    sorry, prius engines are so noisy, i couldn't really identify anything unusual
     
  3. rjparker

    rjparker Senior Member

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    Edit: Did get it to play but could not hear any real difference, especially in amplitude.
     
    #3 rjparker, Oct 3, 2020
    Last edited: Oct 3, 2020
  4. prnico

    prnico Junior Member

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    I can hear it pretty clearly but maybe it's because I've also heard it standing next to the car. If you look at the timeline below the video, at 6,7 and 8 seconds there are three of the loudest pulses of this noise.
     
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  5. prnico

    prnico Junior Member

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    Sorry, don't know why this wouldn't work on an Apple. I don't think this is a problem with the engine, but rather something rattling in resonance next to it.
     
  6. bisco

    bisco cookie crumbler

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    it worked on my mac book, i'll listen again, paying close attention at those times
     
  7. bisco

    bisco cookie crumbler

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    the sound at those times almost seems like another electric motor starting and stopping. i wonder if it is a pump.
     
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