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Spark plug question

Discussion in 'General Tundra Discussion' started by healeyman, Jan 23, 2020.

  1. Jan 23, 2020 at 9:06 PM
    #1
    healeyman

    healeyman [OP] New Member

    Joined:
    Aug 13, 2018
    Member:
    #18121
    Messages:
    6
    Hello All,
    It's been a couple of years since my last post and I have some questions regarding spark plugs.
    My 2002 4.7 Tundra has 130K miles on it. I bought it used about 6 years ago with 80K miles on it. I decided to change the spark plugs but I've seen on the forum that there is some discrepancy with regards to type and gap.
    I pulled the old one and they were Bosch Iridium with a gap of .044".
    Went to the Napa parts store and got a new set of NGK that aren't Iridium and they are gapped to .032". It appears that different plugs have different gaps which has led to numerous discussions but in the forum no one has stated exactly which of the plugs they have been using.
    I went to the NGK web site and put in the year, model and engine size. It gave me about 6 options, all are gapped to .032"
    Then I saw a post from a member that is rebuilding his truck and he has a sticker on the valve cover that says "Use Iridium Plugs Only".
    I looked at Denso and they have different gaps for different plugs, see below.
    K20R-U
    Engine:
    V8 (4.7L)
    CC:
    4663
    CID:
    285
    8
    Note:
    Gap 0.032
    Label:
    U-Groove Conventional
    View
    Buy
    PK20R8
    Engine:
    V8 (4.7L)
    CC:
    4663
    CID:
    285
    8
    Note:
    Gap 0.032
    Label:
    Double Platinum
    View
    Buy
    SK20PR-A8
    Engine:
    V8 (4.7L)
    CC:
    4663
    CID:
    285
    8
    Note:
    Gap 0.032
    Label:
    Iridium Long Life
    View
    Buy
    PK20TT
    Engine:
    V8 (4.7L)
    CC:
    4663
    CID:
    285
    8
    Note:
    Gap 0.040
    Label:
    Platinum TT
    View
    Buy
    IK20TT
    Engine:
    V8 (4.7L)
    CC:
    4663
    CID:
    285
    8
    Note:
    Gap 0.040
    Label:
    Iridium TT
    View
    Buy
    IK20
    Engine:
    V8 (4.7L)
    CC:
    4663
    CID:
    285
    8
    Note:
    Gap 0.044
    Label:
    Iridium Power

    What are most of you guys using and what are you experiencing with regards to performance and fuel economy?
    What is the reason for so many different choices?
    What seems to be the consensus with the best plug for this engine?
    I'm really confused.
    Pete
     
  2. Jan 25, 2020 at 8:44 AM
    #2
    T-Guy69

    T-Guy69 New Member

    Joined:
    Nov 21, 2019
    Member:
    #38939
    Messages:
    671
    Gender:
    Male
    Long Island
    Vehicle:
    Black 2020 Tundra SR5
    First off, the proper heat range is important.

    I have tried AC, Champion, Bosch and NGK. Hands down NGK, for my application is the best. That was the only plug I could run on the street, Time Trial the car (Corvette, not a Toyota), and still keep going on the same plugs. AC is also a good reliable plug.

    Many people will like the Denso. But I have had such good luck with NGK, I see no reason to switch. Any plug change in my Toyota's have always been NGK.
     
  3. Jan 25, 2020 at 8:47 AM
    #3
    TXRailRoadBandit73

    TXRailRoadBandit73 TOYOTA,RAILROADER,RÖKNROLLN',BEER,BACON,FURBABIES

    Joined:
    May 30, 2016
    Member:
    #3487
    Messages:
    49,129
    Gender:
    Male
    First Name:
    Adam
    RGV, TEXAS
    None yet
    What does your owner's manual say? @Roman parts guy give him your VIN# or call your dealer run #VIN they should tell you
     
    Roman likes this.
  4. Jan 25, 2020 at 2:44 PM
    #4
    plumber802

    plumber802 New Member

    Joined:
    Apr 13, 2018
    Member:
    #14412
    Messages:
    907
    Gender:
    Male
    First Name:
    Andy
    Vermont
    Vehicle:
    2018 White Platinum CM
    When you decide on which plugs are correct make sure to buy from a reputable vendor. There are cheap Chinese counterfeit NGK spark plugs for sale on eBay and Amazon. There's a thread on here that goes into detail about this.
     
  5. Jan 27, 2020 at 9:18 AM
    #5
    Roman

    Roman Toyota Parts Master Vendor

    Joined:
    Jan 14, 2015
    Member:
    #876
    Messages:
    3,133
    Gender:
    Male
    First Name:
    Roman
    Franklin, TN
  6. Jul 31, 2021 at 11:24 AM
    #6
    Shanet421

    Shanet421 (Semi) New Member

    Joined:
    Oct 17, 2020
    Member:
    #53708
    Messages:
    872
    Gender:
    Male
    San Diego,CA
    Vehicle:
    2013 CM 5.7L 4x4 SR5 Super White
    Please help fellas I’m getting conflicting info on correct Denso part number for plugs.

    My VIN engine specs.
    33F706D5-180C-46C0-A19B-4A4DEE35458D.jpg


    My manual specs
    F2960A2C-853B-4A1D-8168-DC93E29FB431.jpg

    My questions are:

    What engine do I have according to manual?

    What Denso part number do I need?

    Is .043 the correct gap?
     
  7. Jul 31, 2021 at 11:37 AM
    #7
    40cpe

    40cpe New Member

    Joined:
    Jul 12, 2021
    Member:
    #65476
    Messages:
    37
    Gender:
    Male
    First Name:
    gene
    Vehicle:
    2008 double cab 5.7L
    none
    The 5.7L is the 3UR-FE engine. The factory plug was Denso SK20HR11 according to my 2008 manual.
     
    Shanet421 likes this.

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