Engine shaking/knocking

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

  1. SirParker77

    SirParker77 Junior Member

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    Folkestone
    Vehicle:
    2010 Prius
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    ----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

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  2. bisco

    bisco cookie crumbler

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    Plug-in Base
    have you done a leakdown test?
     
    Mendel Leisk likes this.
  3. Mendel Leisk

    Mendel Leisk Sand Pounder

    Joined:
    Oct 17, 2010
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    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.
     
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