Tapping Knocking anyone know?

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by dig4dirt, Oct 1, 2025.

  1. dig4dirt

    dig4dirt MoonGlow

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    Lancaster Co PA
    Vehicle:
    2014 Prius c
    Model:
    Two
    I have this tapping/knocking happening

    This only happens during the warmup stages.
    Once warmed up, it does not happen.
    Also, if there is any load on engine during warmup, it does not happen.

    Could this be lifters, rockers, valves?
    I would be interested in replace the lifters, but I just don't know if that is what it is.


    I recently purchased this car just shy of 200k miles. it is a 2017

    - YouTube <<< yt shorts link
     
  2. EchoEcho

    EchoEcho Junior Member

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    Did you ever get to the bottom of this?
     
  3. dig4dirt

    dig4dirt MoonGlow

    Joined:
    Apr 6, 2012
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    Location:
    Lancaster Co PA
    Vehicle:
    2014 Prius c
    Model:
    Two
    Nope, still is a thing.
    Has not got any better or worse.
    I put over 20k miles on so far. @218k

    I used some MMO without change.
    I am on my 4th Valvoline Restore and Protect oci

    no change.

    Oh well, I'm sure it is lifters, rockers or valves, but have not opened her up yet.