2012 Prius spark plug change

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by CanyonWells, Jun 16, 2026 at 10:34 PM.

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  1. CanyonWells

    CanyonWells New Member

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    Location:
    Tucson
    Vehicle:
    2012 Prius
    Model:
    Three
    I have a 2012 Prius at 120k. I bought it off an older couple who took very good care of it.

    I changed the spark plugs today and noticed some heavy residue on the spark plug threads. Could this possibly be a valve cover gasket leak or a tube valve seal leak?
     

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    #1 CanyonWells, Jun 16, 2026 at 10:34 PM
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