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NGK iridium plugs?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by HDFD10, May 4, 2010.

  1. May 6, 2010 at 5:25 PM
    #41
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    I didnt list the NGK's as they dont hold a gap well. They are out of spec after 20K miles. The Denso plugs listed in my write up are the best I have tried.
     
  2. May 6, 2010 at 5:46 PM
    #42
    alsmith0317

    alsmith0317 Member

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    From experience with my truck, changed my plugs at 100k just because. Gas mileage always stayed around 19.5 - 21.3. They looked really good, so I went back with factory and I'll change them at my next 100k.
     
  3. May 6, 2010 at 5:46 PM
    #43
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Its not a matter of having the last word. Your comparing different engines in different states of tune. A friend and I spent 2 days dynoing different plugs, in 3 different engines (5VZ, 1GR-FE, and a Diamler 4.7). The best gains all were had with the OEM recomended plugs. Many of the Iridium plugs showed a slight loss, though it was within the margin of error of the dyno. We got 4 CEL's on the Toyotas when useing a Non copper/nickle plug. Wife threw out my notes, so I cant give details on what plugs did what. All gaps were tripple checks, and gapped to manufacter specs. Your agument of "Iridium/platinum plugs being the 'best'" is simply not the case in these engines. Mind teh 1GR is a more forgiving engine (IIRC, only 1 CEL was throw), while the 5VZ was very finicky with what was used. This being said, by all means, keep useing the platinum/iridium plugs of your favor, as you seem very content with them. I simply recomend what I think is best, based on my tests, and results. In any FI application, I will always recomend a "colder plug" such as an Iridium, or the like, but in an NA aplication, in the engines I have tested, I found no advantage.
     
  4. May 6, 2010 at 6:46 PM
    #44
    buddywh1

    buddywh1 Well-Known Member

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    Wow...sorry to start this...

    I was also surprised when I read of the 30K service interval in the manual and saw what I expected when NGK listed copper plugs as the OEM replacement.

    If it wasn't already apparent...I like the longer life of platinums and iridiums and will use them too. Careful use of anti-seize makes removal of plugs with 100k miles from aluminum heads a non-problem.

    Any potential gains from plug material is doubtless very small and quickly lost as the copper electrode erodes. As it must.
     
  5. May 6, 2010 at 6:54 PM
    #45
    BakoTruck

    BakoTruck Well-Known Member

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    Mostly stock for now, I have added a cb radio, various cheap mods and I plan on adding aftermarket wheels and other items in the future.
    Yeah, It's all your fault this got started when you quoted me. lol j/k
     
  6. May 7, 2010 at 1:21 AM
    #46
    TACOMA TRD

    TACOMA TRD Well-Known Member

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    Off Topic....ummm I just changed my plugs, at 40k, I didnt use anti seize. Should I take them out and wrap them, or do you think I should be ok. I will change again in 30K more.
     
  7. May 7, 2010 at 4:56 AM
    #47
    buddywh1

    buddywh1 Well-Known Member

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    If your plan is to keep your Tacoma for 200K+ miles I certainly would. But then I'm really conservative about things I'm not sure of :eek:.

    I know NGK is big on their thread finish and don't recommend use of anti seize, I'd assume Denso is the same. But it's my truck, it does no harm, so why not?
     
  8. May 7, 2010 at 5:15 AM
    #48
    SManZ

    SManZ el tráfico más lento se queda derecha

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    What causes a CEL when using iridium or platinum plugs?
     
  9. May 7, 2010 at 5:19 AM
    #49
    ToucanV13

    ToucanV13 You think I was rollin out here naked?

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  10. May 7, 2010 at 5:25 AM
    #50
    BlueT

    BlueT Well-Known Member

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    Well is it possible that fuel has something to do with shorter life of copper plugs or CEL with Iridium's?.
     
  11. May 7, 2010 at 5:30 AM
    #51
    T@co_Pr3runn3r

    T@co_Pr3runn3r XXXXXXXXXXXXXXXXXXX

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    This made me laugh. My 05 4cyl is spec'd from factory with denso iridiums.
     
  12. May 7, 2010 at 5:53 AM
    #52
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    No idea.

    Yep. All the second gen 2.7 have Iridium plugs from the factory.
     
  13. Jun 15, 2010 at 6:26 AM
    #53
    tacobox

    tacobox Evasive Maneuvers PMKMS

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    Sorry to bump a oldish thread but I'm about to install iridiums in my 1grfe. What was the code it was throwing? P0300-p0306?
     
  14. Jun 15, 2010 at 7:26 AM
    #54
    night_angel

    night_angel Well-Known Member

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    I put in my truck the NGK (6619) LFR6AIX-11 Iridium IX ,
    are excellent Spark Plug...
     
  15. Aug 29, 2010 at 4:40 PM
    #55
    Bob r

    Bob r New Member

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    I am wanting to know if I should change up to iridium plugs or stick with the OEM plugs.
    Has anyone experienced the difference in plugs.
    looking for information before I change
     
  16. Aug 29, 2010 at 4:46 PM
    #56
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    IMHO, Stick with the OEM.
     
  17. Mar 28, 2011 at 1:20 PM
    #57
    DGXR

    DGXR Well-Known Member

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    The plug threads get anti-seize compound at the factory. No worries. See next quote:

    Exactly

    Take them out when the engine is cool, apply anti-seize compound, and reinstall using proper torque.
     
  18. Mar 28, 2011 at 4:54 PM
    #58
    genxer36

    genxer36 Lord of Tomfoolery

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    I disagree on the NGK iridums quote. They are in my truck now with 80,000 miles on them & no issues.
     
  19. Apr 28, 2011 at 2:05 PM
    #59
    Oregon TRD

    Oregon TRD "GO DUCKS" Edition

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    I just ran into this thread and figured i better change my plugs. I have 81,000 miles and haven't changed em yet ...:eek: .... i have no idea what plugs are in there. i wanna keep my truck running top notch so i better change these. It runs awesome and everything is kickass but I prob should change them bad boys out!
     
  20. Apr 29, 2011 at 4:56 PM
    #60
    DGXR

    DGXR Well-Known Member

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    oh nvm...
     
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