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NGK's and Denso's in the same 1GR-FE

Discussion in '2nd Gen. Tacomas (2005-2015)' started by it4dps, Jun 11, 2010.

  1. Jun 11, 2010 at 11:16 AM
    #1
    it4dps

    it4dps [OP] New Member

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    Vince
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    I have an 06 double cab with a 4.0 liter, which I bought new. It was time to change the spark plugs, so I went out and got 6 Denso K20HR-U11's which were supposed to be exact OEM replacements. This morning I changed the plugs and to my astonishment I found 3 NGK LFR6C-11's in the driver's side of the engine and 3 Denso K20HR-U11's in the passenger's side. (..just like what I bought..) I haven't ever changed the plugs, and I'm the only person who has ever taken a wrench to this truck. This had to have come from the factory or the dealer before I took delivery of it new back in 2006.

    First Question - Was this done for a reason? If so, should I go get 3 NGK's and put them in the driver's side of the motor? :notsure:

    Second Question - Is this just a screw up at the factory? If so, this sounds more like something that you would see in a GM or Chrysler, but not a Toyota. (..I sure hope Toyota isn't catching "GM Disease"..:eek:)

    Has anyone else ever seen this?

    Thanks for any info & Have a Great Day!:)

    Vince
     
  2. Jun 11, 2010 at 11:17 AM
    #2
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Normal. There is a reason for it I just don't know what.
     
  3. Jun 11, 2010 at 11:19 AM
    #3
    it4dps

    it4dps [OP] New Member

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    So should I change the driver's side back to NGK's?
     
  4. Jun 11, 2010 at 11:23 AM
    #4
    NAAC3TACO

    NAAC3TACO Well-Known Member

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    No. Put the 6 Densos in and you will be fine.
     
  5. Jun 11, 2010 at 11:26 AM
    #5
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

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    x2
     
  6. Jun 11, 2010 at 11:33 AM
    #6
    it4dps

    it4dps [OP] New Member

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    Anyone have any idea what's behind this?
     
  7. Jun 11, 2010 at 11:35 AM
    #7
    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.
    I have theory on this, but it involves the upper most higher ups of the top secret part of our government.
    Very scary stuff. lol
     
  8. Jun 11, 2010 at 11:36 AM
    #8
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Something to do with that ancient race that you can only visit through a stargate right? Thought so.
     
  9. Jun 11, 2010 at 11:37 AM
    #9
    NAAC3TACO

    NAAC3TACO Well-Known Member

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    NGK and Denso got in a fight to see who would supply the plugs for the V6 Tacoma. It was a draw.:D
     
  10. Jun 11, 2010 at 11:39 AM
    #10
    ktmrider

    ktmrider Senior Member

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    no its the star ship enterprises flux capacitor they control this :eek:
     
  11. Jun 11, 2010 at 11:49 AM
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    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.
    Actually I do have a real theory on this, when I was looking around on the ttora site that had our trucks explosion manuals on.
    I noticed that they listed 2 alternators, one was made by Denso and the other made by NGK. Or at least it looked like the manual said they were made by those companies.

    As to why they decided to have mix plugs and the exact reason why, I don't know. Maybe they have both companies make parts for their cars and trucks. And maybe Toyota felt it was best to split it. Instead of going with just one company, which may involve a company leaving?
     
  12. Jun 11, 2010 at 11:56 AM
    #12
    StandingCow

    StandingCow Well-Known Member

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    To confuse us and cause confused threads like this one. :)
     
  13. Jun 11, 2010 at 11:57 AM
    #13
    tim920

    tim920 Never seen Forest Gump

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  14. Jun 11, 2010 at 12:03 PM
    #14
    it4dps

    it4dps [OP] New Member

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    I guess I should have phrased my question a little better..

    Does anyone have any constructive idea what might be behind this?

    Usually Toyota does things for a a reason. I can't believe that they would send a vehicle out of the factory with 2 different spark plus unless they did it for a reason. NGK's tend to run hotter than Denso's, and I curious why they put different plugs in different places on the motor.

    Thanks for any serious replies...
     
  15. Jun 11, 2010 at 12:05 PM
    #15
    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.
    You didn't think my last post was serious?
     
  16. Jun 11, 2010 at 12:09 PM
    #16
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Someone posted some info on it but I don't remember the exact details. Something about the passegner cylinder head running slightly hotter or something that. You will be fine with NGK or Denso all around.
     
  17. Jun 11, 2010 at 8:13 PM
    #17
    05Moose

    05Moose Middle-Aged Member

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    My dad's a retired Toyota mechanic and he told me once that Toyota did this in all their V6's (all models) for just about forever (at least going back to the early '90's). He was told that it was Toyota's way of guaranteeing to be fair to each of the two suppliers.

    Think of it this way, one can't argue that the other company's plugs were put in more engines.:D
     
  18. Jun 12, 2010 at 7:32 AM
    #18
    Fortech

    Fortech Well-Known Member

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    Normal (but weird). This was the case for the previous generation 3.4L V6 as well.
     
  19. Jun 12, 2010 at 7:41 AM
    #19
    SManZ

    SManZ el tráfico más lento se queda derecha

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    What about 4 cyls? Do they have 2 pairs of different plugs?
     
  20. Jun 12, 2010 at 7:45 AM
    #20
    OH-MAN

    OH-MAN Well-Known Member

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    I plan on swaping sides with my plugs. H.P. and M.P.G. go up a bunch!!!!

    Then go 2 NGKs and a Denso on one side then 2 Densos and one NGK on the other.

    Lot's of possibilitys.
     
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