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  1. savemyprius100
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    2011 Prius - Knocking

    Update: I added K Seal to the coolant tank 3 days ago and I have NOT experienced the knocking at startup once! The car is running great and I am...
    Post by: savemyprius100, Oct 1, 2025 in forum: Gen 3 Prius Main Forum
  2. savemyprius100
    Thread

    2011 Prius - Knocking

    Greetings PRIUSchat, I have a 2011 Prius with ~180k miles on it and have been experiencing engine knocking all year. My coolant level drops and I...
    Thread by: savemyprius100, Sep 25, 2025, 6 replies, in forum: Gen 3 Prius Main Forum
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