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Age of spark plug

Discussion in '1st Gen Tundras (2000-2006)' started by AV8R4AA, Apr 21, 2022.

  1. Apr 21, 2022 at 1:49 PM
    #1
    AV8R4AA

    AV8R4AA [OP] New Member

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    Right at 100K miles
    Remove a plug to check condition.

    looks ok to me.
    If it's original than getting new set.
    Is this a factor plug?23ED2C0A-CC9F-4CBF-ADE7-8DB6BAD98FFD.jpg
     
  2. Apr 21, 2022 at 2:06 PM
    #2
    BubbaW

    BubbaW Saw it right off

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    Last edited: Apr 22, 2022
    FrenchToasty likes this.
  3. Apr 21, 2022 at 2:11 PM
    #3
    Mr Badwrench

    Mr Badwrench New Member

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    How'd the electrode look at 100K?
     
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  4. Apr 21, 2022 at 3:17 PM
    #4
    AV8R4AA

    AV8R4AA [OP] New Member

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    I will take a picture.
    From my tired eye, they look great.
     
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  5. Apr 21, 2022 at 3:27 PM
    #5
    Mr Badwrench

    Mr Badwrench New Member

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    I'd bet they weren't in there too long. I replaced mine at 150k and they were flush with the porcelain. Oops lol
     
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  6. Apr 22, 2022 at 8:19 AM
    #6
    shifty`

    shifty` I might be an adult, I'm a minor at heart

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    There's a typo in the manual, and the actual Denso part is SK 20R11

    @AV8R4AA what does the diode end look like?
     
  7. Apr 22, 2022 at 9:35 AM
    #7
    AV8R4AA

    AV8R4AA [OP] New Member

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    I will get a picture today.
    Only pulled one, it looked great.
    I wouldn’t change them if it weren’t
    for time in use.
     
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  8. Apr 22, 2022 at 11:54 AM
    #8
    zech

    zech New Member

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    Good to check them all. Will let you know of any issues you've had that were isolated to a single cylinder. I just replaced all 8 plugs on mine for the first time and found 2 were loose and were letting combustion gases/heat into the socket well, degrading/burning/cracking the ignition coil.
     
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  9. Apr 22, 2022 at 1:11 PM
    #9
    BubbaW

    BubbaW Saw it right off

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    Good to know, I’ve edited my post to reflect correction.
     
  10. Apr 24, 2022 at 5:15 PM
    #10
    AV8R4AA

    AV8R4AA [OP] New Member

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    2316EE90-8B88-4AAF-B4FE-749A8969A8FE.jpg Here is the business end.
     
  11. Apr 24, 2022 at 5:57 PM
    #11
    Sirfive

    Sirfive Master Procrastinator

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    Gap is supposed to be .031
     
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  12. Apr 24, 2022 at 6:02 PM
    #12
    shifty`

    shifty` I might be an adult, I'm a minor at heart

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    Just know, the SK 20R11 Iridium plugs are pre-gapped and manuf'er specifically stated (on my package) not to gap them.
     
  13. Apr 24, 2022 at 6:03 PM
    #13
    FrenchToasty

    FrenchToasty Desert rat, 6 lug enthusiast

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    Not much left to gap…..
     
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  14. Apr 24, 2022 at 6:04 PM
    #14
    Sirfive

    Sirfive Master Procrastinator

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    Just curious how much it had opened up.
     
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  15. Apr 24, 2022 at 9:06 PM
    #15
    Mr Badwrench

    Mr Badwrench New Member

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    0.031 or .044 depending on the manufacturer. I had issues with the 0.03's, my engine just didn't like them, they were NGK's.
     
  16. Apr 24, 2022 at 9:10 PM
    #16
    Mr Badwrench

    Mr Badwrench New Member

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    Pretty worn! Looks like the threads are pretty healthy, that is a good thing. I'd certainly bet those aren't the originals, but I've been wrong a lot of times before. I mentioned above, I had better luck with the 0.044 gaps than I did the 0.033 (or 31's). I would go with Densos over the NGK's from personal experience. It probably doesn't make a difference unless your engine is as worn as mine.

    Your fuel mileage will drop after replacing them when they are that worn haha. When they are super gapped they arc hotter to bridge the gap. I ended up with a knock in cold weather after replacing my densos with the smaller gapped NGK's.. again, my engine is not very well maintained. Hard to believe something as trivial as a spark plug gap could even make a difference, go figure.
     
    Last edited: Apr 24, 2022
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  17. Apr 25, 2022 at 3:40 AM
    #17
    BubbaW

    BubbaW Saw it right off

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    If we are to believe our 00-04 Owners Manual, the 2UZ−FE/V8 are gapped at .031 and the 5VZ–FE/V6 are gapped at .043.

    As for 05-06, the 2UZFE with the VVT-i went with a different heat rating than prior years, which gave those years different gap spec.

    Plugs.jpg
     
  18. Apr 25, 2022 at 4:21 AM
    #18
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

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    For reference. Here's my 2017 factory plugs at 70,000 miles.

    Plugs1.jpg
     
  19. Apr 29, 2022 at 12:18 PM
    #19
    AV8R4AA

    AV8R4AA [OP] New Member

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    I installed a new set of Iridiums. The XSP seems to have a fair amount
    Better power. I also did several transmission drain and fills. The truck is
    driving very nicely. Kicking it down to passing gear is fun and sounds
    addicting ! I used sparingly anti seize. Coming from aircraft world, I’m old school.
    Always used it on aircraft engines. Just don’t glob it on. Big milestone coming up.
    Getting near the 100K mark….. better sell soon, prolly all worn out.
     
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