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Spark plug change

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Greenteapri, Jan 27, 2019.

  1. tonynap

    tonynap Member

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    Agree. I do all highway driving and just replaced the plugs with the original (SC20HR11). At 132,000 miles they came out looking great. Not the best picture but no deposits or bridging that I can tell. FWIW, they smell like cheap brandy.
     

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    Robert Holt and jack black like this.
  2. jack black

    jack black Active Member

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    interestingly, on denso website, there was no iridium TT for prius listed. some other online catalogs still listed the 20 and this is what I bought ($30 advance auto with coupon code). I haven't installed them yet but predict no issues.
     
  3. Greenteapri

    Greenteapri Active Member

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    One week update

    The plugs are so smoooOOOOth. MPGs are up about two. Idle and Acceleration are improved. I have not had one misfire. I've been listening/feeling for one but fail to find one. So far, so good.
     
    Robert Holt and Fostel like this.
  4. Grit

    Grit Senior Member

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    Thanks, I will be doing spark change soon. At 112,000 miles now, did you use anti seize?
     
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    Dry thread torque spec is 15 ft/lb. What I did last time I looked at them was put on light anti-seize, then kinda regretted, wiped it off best I could (leaving a little), then torqued to 12.
     
  6. Greenteapri

    Greenteapri Active Member

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    No. She's drinking oil so I will be changing them more often than recommended by Toyota.