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Rattle When Gas Engine Starts

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by antiglare, Dec 23, 2020.

  1. antiglare

    antiglare Member

    Joined:
    Nov 20, 2011
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    Location:
    SF Bay Area, CA
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    I've noticed that on my Prime, when I manually switch over from EV mode to HV by pressing the HV/EV button, the engine makes a rattle like the sound of loose marbles being tossed. This only happens when the engine starts for the first time during the drive in HV mode; under normal HV operation, the engine turns on and off quietly.

    Has anyone else noticed this on their Primes?
     
    #1 antiglare, Dec 23, 2020
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    different than the cold start sound on your last prius?
     
    #2 bisco, Dec 23, 2020
  3. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
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    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    I have noticed a similar thing;).

    And I installed an oil catch can at 21 k to collect data:)

    But here's what I found at 30k miles when I did our oil change:

    73543908-3845-4E0A-B02D-1B8453435B4D.jpeg ACF3738A-7BA8-484D-B6C8-EA6800596A89.jpeg

    So this spooge is recycling around :cool:.

    Since the engine runs less, the longer you go without running the engine, the more condensation builds. Something to consider (y).
     
    #3 Raytheeagle, Dec 24, 2020
    antiglare likes this.
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