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NGK iridium plugs?

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

  1. May 4, 2010 at 11:03 AM
    #1
    HDFD10

    HDFD10 [OP] Well-Known Member

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    Hey guys need new plugs and can readily get these at my near by auto parts as i do not live near a dealership. Actually and they also have denso platinum plugs. So which ones should i get??
     
  2. May 4, 2010 at 11:19 AM
    #2
    BakoTruck

    BakoTruck Well-Known Member

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    Herbie Hancock
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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 would recommend ordering the stock plugs, they are very good. A little on the expensive side, but good.
    How many miles do you have on the plugs you have in now?
     
  3. May 4, 2010 at 11:21 AM
    #3
    PreRunner

    PreRunner Well-Known Member

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    stock long life denso iridiums FTW
     
  4. May 4, 2010 at 11:27 AM
    #4
    bambooshoots

    bambooshoots Be a fountain, not a drain.

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    I did it again. Got tired of paying truck payments and gas and traded in for a 2015 Honda Accord Sport since I enjoyed my 2013 Sport so much.
    SO far I have been very pleased with my Denso Iridium Powers. I would have gotten the Long Life's if they had them in stock...I don't want to revisit the driver's side plugs anytime soon.
     
  5. May 4, 2010 at 11:28 AM
    #5
    buddywh1

    buddywh1 Well-Known Member

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    I HAVE to disagree! the stock plugs are (by all accounts) copper and need to be replaced at 30k. That's pretty much makes them crappy bad and way outdated for modern engines.

    Why not change to platinum (or iridium) and change them at least 1/2 as often?
     
  6. May 4, 2010 at 12:10 PM
    #6
    HDFD10

    HDFD10 [OP] Well-Known Member

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    So how about denso platinums/ Sound good enough? and while i am at the store what are you all using in your transfer cases. May as well swap that out too.
     
  7. May 4, 2010 at 12:41 PM
    #7
    buddywh1

    buddywh1 Well-Known Member

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    I've always liked NGK plugs...but I'm sure Denso are great too. I'd suggest double platinums for longest life.

    I pulled the NGK platinums in my Maxima at 60K and the gap was surprisingly close to original and the electrode was still fairly sharp. I went ahead and changed them only 'cause I had $72 dollars worth of brand new plugs for it, otherwise I'd have just regapped and driven another 40k.
     
  8. May 4, 2010 at 12:49 PM
    #8
    HDFD10

    HDFD10 [OP] Well-Known Member

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    What is this problem i keep hearing with the drivers side front plug. And how do you get around it?
     
  9. May 4, 2010 at 1:01 PM
    #9
    NAAC3TACO

    NAAC3TACO Well-Known Member

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  10. May 4, 2010 at 1:06 PM
    #10
    HDFD10

    HDFD10 [OP] Well-Known Member

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  11. May 5, 2010 at 9:29 AM
    #11
    Goshawk

    Goshawk Well-Known Member

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    I learned about one plug to stay away from and that is the Diamond Fire E3. Both the auto stores I frequent say they have had customers that installed them and the end of the plugs got so hot they burnt off, fell into the cylinder and scored the pistons and walls. True or not, not really sure but not willing to take a chance either.
     
  12. May 5, 2010 at 10:59 AM
    #12
    TacomaBuzz

    TacomaBuzz Manual Transmission Enthusiast

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    Just use all DENSO, Toyota uses Denso on the Drivers side and NGK on the passenger from the factory but its easier to just use all Denso. Toyota recommends you change them every 60K.
     
  13. May 5, 2010 at 11:08 AM
    #13
    Tillers_Rule

    Tillers_Rule ......................

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    When I changed my stock plugs I had Denso in the left side and NGK on the right side from the factory...Just replaced them all with NGK
     
  14. May 5, 2010 at 11:27 AM
    #14
    TACOMA TRD

    TACOMA TRD Well-Known Member

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    I just did mine last week, used Denso stock plugs. Paid 3.00 each. Used the DIY on this site. Great instructions.

    PS....I think it was Chris 4x4 that put them up, take note to how he taped off his plug socket......your going to want to do that. I learned on my first plug.:D
     
  15. May 5, 2010 at 5:25 PM
    #15
    travelingman

    travelingman What would Scooby do?

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    It's 30k miles
     
  16. May 5, 2010 at 6:08 PM
    #16
    chris4x4

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

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    FlimFlubberJAM
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    The OEM plugs are not "Bad". They are designed to run with the ignition requirements that Toyota paid big bucks to a bunch of engineers to deisgn. And at the propper heat range. Useing Platinum, iridium, or whatever, is a waste. In some cases, a Check engine light has been thrown when useing them. Aside from "maybe" lasting longer, they offer no advantage over the OEM Nickle/copper plugs.
     
  17. May 5, 2010 at 6:14 PM
    #17
    rmerchant3

    rmerchant3 Insert nonsense here

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    This made me laugh
     
  18. May 5, 2010 at 6:17 PM
    #18
    chris4x4

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

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    Care to elaborate as to why?
     
  19. May 5, 2010 at 6:28 PM
    #19
    rmerchant3

    rmerchant3 Insert nonsense here

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    It's just that you were correct in your first statement as to say that Toyota designed the truck to run with copper plugs. But to state that these are best for the truck is by far a longshot. Toyota pays engineers hundreds of thousands of dollars to engineer these cars. But to what standards? It's not always to be the "best". I can assure you that regular plugs were used to cut down on the cost of the vehicle. You would be amazed at what manufactures do to cut in every area they can. (ever seen a higher end Acura or Lexus with standard plugs?)

    Platinum and iridium offer MANY advantages over copper plugs. Longer life is the number one fact. Copper plugs need to be replaced every 30K due to the wearable center electrode. Platinum and Iridium are much more resilient metals and can take the heat and extreme pressures that the combustion chamber produces. I've changed thousands of iridium plugs at 100K and they still looked brand new besides some normal carbon buildup. These metals also allow for a sharper center electrode therefore creating a better more consistent spark. This in turn leads to better gas mileage and better horsepower and torque readings. Are the gains significant? No...not in a stock application, but they are there.

    Just a little something i found as well...

    ||Metal|| ||Melting Point|| ||Electrical Conductivity|| ||Thermal Conductivity||
    ||Copper|| ||1083 C|| ||.596 x 10^6|| ||400 W/(m K)||
    ||Platinum|| ||1768 C|| ||.0966 x 10^6|| ||72 W/(m K)||
    ||Iridium|| ||2410 C|| ||.197 x 10^6|| ||150 W/(m K)||

    The higher the number for conductivity the more conductive the metal is. In terms of thermal conductivity the higher the number the faster it can dissipate heat away from the tip of the center electrode.

    These numbers will show why some people still use copper plugs in an turbo engine. But for everyday applications, put the iridiums in there and save yourself the hassle and money of changing them 1 time vs 4 times in the time that the iridiums will last.

    Copper
    $3.00 X 6 = $18.00
    18 X 4 = $72.00

    Iridium
    $7.50 X 6 = $45.00

    (If you change every 30K with copper and 120K with the iridiums)

    BTW I meant no offence in my comment ;) Just my nature.
     
  20. May 5, 2010 at 6:37 PM
    #20
    chris4x4

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

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    You will not get HP gains, or MPG gains from a plug change. Maybe on an older vehicle, but not a modern one. I said the Iridium plugs and Platinum may last longer, but they offer no other benafit to these engines.
     
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