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Spark Plug changeout after 30K How do they look?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Adreenaleen, Nov 12, 2011.

  1. Nov 12, 2011 at 5:27 PM
    #1
    Adreenaleen

    Adreenaleen [OP] Active Member

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    [​IMG]
    The top set are Denso plugs and the bottom are NGK. The Denso's gap was between .043 to .045 whereas the NGK's looked a little more worn. They were between .047 to .055. Notice the dark what looks like oil on the threads. Is this normal? My mileage and everything seems normal. I typically get between 17 to 18 mpg (4X4). Also about what mileage do any of you use Seafoam?
     
  2. Nov 12, 2011 at 5:48 PM
    #2
    RainDodger

    RainDodger YGWYPF

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    They look just fine. As usual these days, our vehicles run pretty lean, so they're quite light colored, but they're all the same. No problems that I see. The gaps will likely be wider than they should be only because there's 30,000 miles on them. Good to go, man. Put in some fresh ones and truck on.....
     
  3. Nov 12, 2011 at 5:56 PM
    #3
    Adreenaleen

    Adreenaleen [OP] Active Member

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    Yeah, I just think it's funny that Toyota used Denso on one side and NGK on the other. It looks like the Denso's held up better. The gaps didn't wear like the NGKs did.:rolleyes:
     
  4. Nov 12, 2011 at 6:06 PM
    #4
    S.B.

    S.B. Well-Known Member

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    I confused the service guy at toyota today by telling him that toyota uses different brands on the same block.
     
  5. Nov 12, 2011 at 6:40 PM
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    05sctaco

    05sctaco Well-Known Member

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    My 05 had different plugs also, it's prob to be able to keep the account, where some of their other cars use NGK plugs only and others denso. Also by having more then one supplier it gives toyota bargaining power
     
  6. Nov 12, 2011 at 7:47 PM
    #6
    RainDodger

    RainDodger YGWYPF

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    I don't think anyone really knows why Toyota does that. I sure don't. I've used NGK plugs for 25 years and had great luck with them. Although I put in the laser platinums, I will probably use the iridiums next time, just to get a bit of added mileage. I think the platinums should run a good 50,000 before needing to be changed out.

    Here's what I recommend:

    NGK Laser Platinums:7654
    NGK Iridiums: 6619
     
  7. Nov 12, 2011 at 7:58 PM
    #7
    KPT

    KPT sees what you did there.

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    I agree with this suggestion
     
  8. Nov 12, 2011 at 8:05 PM
    #8
    Monkeysuncle

    Monkeysuncle My Cat's breath Smells like Cat Food

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    Sweet Jesus[​IMG]
     
  9. Nov 12, 2011 at 8:05 PM
    #9
    Bishop2Queens6

    Bishop2Queens6 Well-Known Member

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    Looking normal. changed out mine at 60 k. the spark plugs closest to the firewall action of fair amount of oxidation and fouling. yours look great
     
  10. Nov 12, 2011 at 8:09 PM
    #10
    Monkeysuncle

    Monkeysuncle My Cat's breath Smells like Cat Food

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    just kidding



    you are gtg
     
  11. Nov 12, 2011 at 8:14 PM
    #11
    Monkeysuncle

    Monkeysuncle My Cat's breath Smells like Cat Food

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    just use the correct plugs. Trust me............................................................................................see......................

    [​IMG]
     
  12. Nov 14, 2011 at 10:09 AM
    #12
    AK Toy

    AK Toy Well-Known Member

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    spider headlights, coustom bumper, tires, paint, CB W/ PA, throttle body spacer, air intake, exhaust
    looks good almost look like a tasty marshmellow:bananadead:
     
  13. Nov 14, 2011 at 1:48 PM
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    Nacho Muchacho

    Nacho Muchacho Member

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    I just changed my spark plugs as well and also had results similar to the OP.

    OP did you note the location of the plugs (forward or aft end of block)?
    The plug with most residue on the threads was the NGK on the driver side closest to the firewall. I'm curious if that side naturally gets the most blowby gasses fed to it's cylinder.


    Anyhow, these are the pics I snapped when changing the plugs:
    [​IMG]
    [​IMG]

    And not to cause any unjust worry, but I originally used a rotary type gauge to gap the plugs but measured it with my calipers after and found it to be up to .005" (5 thousandths) too large. So I used a feeler gauge to regap them. So if anyone recently changed plugs and gapped using a rotary type gauge, measure the thickness with a caliper if you got it.

    Cheers,
    NM
     
  14. Nov 14, 2011 at 4:56 PM
    #14
    Adreenaleen

    Adreenaleen [OP] Active Member

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    OP did you note the location of the plugs (forward or aft end of block)?
    The plug with most residue on the threads was the NGK on the driver side closest to the firewall. I'm curious if that side naturally gets the most blowby gasses fed to it's cylinder.


    No, I did'nt think about that till it was too late. I did find it interesting how the NGKs wore more than the Densos. I look forward to seeing how these do this time around.
     
  15. Nov 14, 2011 at 5:02 PM
    #15
    xJuice

    xJuice My spoon is too Big!

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    I did mine not too long ago, and also found the driver's closest to firewall was the dirtiest. It worried me a for a little while, but then read someone here mention the same thing a couple times, so it sounds normal.
     
  16. Dec 10, 2011 at 1:15 AM
    #16
    dalesrn

    dalesrn Tacoma TSS

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    Are you all replacing the original plugs with identical plugs (NGK & Denson) mixture, or are you all using 6 of the same plugs? If so, what plugs are you using?
     
  17. Dec 10, 2011 at 7:43 AM
    #17
    PMK

    PMK Well-Known Member

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    FWIW, probably already been posted, so this could be a reminder.

    Toyota states in the manuals for the 2010 trucks with the 1gfr engine that the plugs need to be replaced at the 30000 mile maintenance to maintain your emissions warranty.

    A few weeks ago I replaced the spark plugs in my truck. These were the originals and had 18000 miles on them.

    I installed the Denso Iridium Power plugs. These are a fine wire, 30k mile style spark plug. The V6 took IKH20 series plugs. These are the same that URD sells.

    PK
     
  18. Dec 10, 2011 at 8:48 AM
    #18
    xJuice

    xJuice My spoon is too Big!

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    I just went up to a dealership and asked for plugs for my truck, they gave me 6 Densos, so that's what I used. They actually have them for a decent price there too.
     
  19. Dec 10, 2011 at 12:14 PM
    #19
    David K

    David K Well-Known Member

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    I posted these pics on 9-28-11 with my 30,000 mile report:

    [​IMG]

    Here are the NGKs:
    [​IMG]

    Here are the Densos:
    [​IMG]

    I was disappointed that the new plugs did not improve the gas mileage at all... ie. no change.
     
  20. Dec 10, 2011 at 1:19 PM
    #20
    85GT 79FJ40

    85GT 79FJ40 Well-Known Member

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    Not surprising at all. From the looks the engine was running perfect. My father put 180k on his 98 before I changed the plugs. He just never thought about it. That actually did make a difference. Those were dual electrode plugs and the centers were actually oval. I put plugs in my older carb equipped vehicles every few years but properly running fuel injected vehicles (especially with COP ignition) really don't need very frequent changes.
     
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