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Engine shaking/knocking

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by SirParker77, May 19, 2021.

  1. SirParker77

    SirParker77 Junior Member

    Joined:
    Apr 10, 2020
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    Location:
    Folkestone
    Vehicle:
    2010 Prius
    Model:
    ----UK----
    Hi.

    I've got a 2010 gen 3 T spirit with 196000 miles on it.
    Mostly it runs like new. The engine shaking and knocking only happens occasionally either cold or hot.

    I'm not getting any codes show up.

    I've replaced the coils, spark plugs, and injectors.
    I've cleaned the entire manifold, throttle body and egr cooler and also cleaned the sensors and have fitted an oil catch can.

    I'm not losing oil or coolant and the oil filler cap and dip stick are normal.

    I've ordered a borascope to check down the spark plug holes, but I'm at a loss now.

    Does anyone have any ideas what could be causing this?
    Thanks,
    Parker

    Posted via the PriusChat mobile app.
     
    #1 SirParker77, May 19, 2021
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    have you done a leakdown test?
     
    #2 bisco, May 19, 2021
    Mendel Leisk likes this.
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    The progression is: Exhaust Gas Recirculation system clogs, head gasket starts leaking. If the EGR is then cleaned, it doesn’t reverse the head gasket failure. Yeah leak down test.
     
    #3 Mendel Leisk, May 19, 2021
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