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The Truth About Spark Plugs....

Discussion in 'Technical Chat' started by chris4x4, Apr 20, 2011.

  1. Apr 22, 2013 at 5:47 PM
    #141
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Thor

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    junk.
     
  2. Apr 22, 2013 at 8:11 PM
    #142
    DoorDing

    DoorDing Thank you, Nancy Roman

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    Yup. ;)
     
  3. Jul 1, 2013 at 10:45 AM
    #143
    garyods

    garyods Member

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    Not the plugs themselves, but if you are using it as a daily driver and paying someone else to perform your service, the Platinum or Iridium plugs offer a much longer service life (3+ times longer) which means 1/3rd less labor (or personal time) to keep it running. I’m just about to have my Platinum plugs replaced after 110k (on the plugs - 190k on the clock) and it’s still running fine, smooth and getting good MPG.

    I like.
     
  4. Jul 1, 2013 at 11:06 AM
    #144
    ABA180

    ABA180 It burns when I pee....

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    Off the assembly line, what do our trucks have..specifically, my 5 lug 2.7, and how often should I change them? Only just hit 19k.
     
  5. Jul 1, 2013 at 4:20 PM
    #145
    worthywads

    worthywads Well-Known Member

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    2.7l = iridium, 120k :evil: it's in your maintenance schedule and manual.
     
  6. Jul 1, 2013 at 5:30 PM
    #146
    ABA180

    ABA180 It burns when I pee....

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    Thank you Sir Wads..I've heard different things, so I figured where better to ask :)
     
  7. Oct 9, 2013 at 9:30 AM
    #147
    talisker

    talisker Well-Known Member

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    Using a longer lasting plug most certainly DOES increase efficiency! If I don't need to replace plugs every 30k and can go a true modern distance, 100k as many manufacturers now suggest as maintenance intervals, who cares if the spark is greater? The plugs are more efficient because I don't have to mess with them all the time. I'm sorry but 30k intervals are standards from 1979.

    You even state that it is a matter of wear on the electrode. If I can go three times longer on wear, I can go three times longer between changes. Tacoma suggests instead that I go through 3 sets of plugs by 90k. That is the true Bull as far as I'm concerned.



     
  8. Oct 9, 2013 at 10:09 AM
    #148
    DoorDing

    DoorDing Thank you, Nancy Roman

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    True, but there can be problems with using non-OEM recommended plugs. I haven't looked into options for my truck yet, but some engines are more particular than others about this.
     
  9. Oct 10, 2013 at 7:18 AM
    #149
    talisker

    talisker Well-Known Member

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    I think I posted my update in the wrong thread. To keep it short, last night I changed my left side plugs and found they were NGK's while the rights were not. I'm thinking my truck had the original factory plugs still in it at 100k! Toyota apparently assembles with different plugs in each side. I read that somewhere on tacomaworld. They were worn but not too bad. If this is the case, that is pretty awesome for a non-iridium plug!
     
  10. Oct 10, 2013 at 7:31 AM
    #150
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    They did make then with different plugs on each side. Strange to me, but oh well. Most everyone that comes to my shop just asks to get NGK for their Toyota, no matter what is in them at the time. Never heard a single complaint from them since either.
     
  11. Oct 10, 2013 at 7:33 AM
    #151
    SpacemanSpiff

    SpacemanSpiff Well-Known Member

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    Efficiency as in replacing, yes. Efficiency as in mileage, no. Also, as the plugs get higher and higher in mileage, will need to regap them to keep them in their most efficient range...
     
  12. Oct 10, 2013 at 8:49 AM
    #152
    garyods

    garyods Member

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    I beg to differ with you. I put 110K on my last set of Platinum plugs with no problem and the mileage was consistent from mile 1 until I replaced them.

    I don’t make this statement based on my personal feelings or random tank mileage. I have a log (I maintain for both tax purposes and for personal history) in which I have recorded every fuel stop, oil changes and lubes, tire changes and all maintenance and parts since I picked it up new.

    I don’t pull plugs to adjust the gap, if I’m going to do the work to remove the plugs I’ll just put new ones back in.

    I replaced the Platinum plugs with Iridium the last time, so I’ll see if they last as long as the old Platinum ones did.
     
    Last edited: Oct 10, 2013
  13. Oct 10, 2013 at 11:38 AM
    #153
    SpacemanSpiff

    SpacemanSpiff Well-Known Member

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    As we all can. By efficiency, meaning an increase in mpg over the standard plugs - which is no. My mileage has been consistent with the use of normal plugs, too. But others will know more though.
     
  14. Oct 10, 2013 at 12:18 PM
    #154
    garyods

    garyods Member

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    I didn't notice a bump in mileage when I changed to Platinum, my mileage increased until I hit about 40k and then it has held steady (not at a little over 190k). It's been a great truck, I swear that I wipe more oil off the dipstick checking the oil level than it uses between changes.

    Other than the HVAC fan resistor and rear springs it's been solid.
     
  15. Oct 10, 2013 at 6:49 PM
    #155
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    When using platinum or Iridium plugs you do not ever need to remove and re-gap them. The older copper tips would wear, requiring a re-gap, but the platinum or iridium ones do not wear like the copper tips did. I have seen thousands of platinum plugs at 100k that were still perfectly gapped.
     
  16. Oct 10, 2013 at 6:56 PM
    #156
    DoorDing

    DoorDing Thank you, Nancy Roman

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    Sidenote: Be very careful adjusting the gap on fine wire or precious metal plugs. As long as the packaging is undamaged, I've had good luck with the plugs arriving gapped to spec.
     
  17. Dec 9, 2013 at 6:42 PM
    #157
    30coupe

    30coupe Well-Known Member

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    I'm thinking I should change the plugs in my new-to-me Tacoma, so I read this entire thread. It was both informative and entertaining. Obviously, I haven't changed the plugs on a Tacoma yet, so I was a bit concerned to hear it took an hour and a half for one poster to change them...and he didn't think that was bad! Hmmm, I've changed more spark plugs than I care to count, but the only time it took that long was on a V6 Corsica my wife had. I had to loosen the motor mounts and jack the engine forward to do the back three plugs on that crosswise, front wheel drive, little beast. Oh, and you couldn't actually SEE the plugs even then.

    I certainly hope this won't be a similar experience. I also try to be economical (okay, I'm kind of a cheap bastard), so I did some tune-up math. O'Reilly Auto carries the NGK plugs for my 3.4 in both platinum and copper core. The coppers are $4.99 each. The platinums are $10.99 each. So, assuming a 30k mile change with the coppers, 90k miles would mean $89.82 worth of plugs. On the other hand, the platinums would theoretically last 100k miles and cost $65.94. Add to this the potential for 4.5 hours of labor versus 1.5 hours, and the platinums start to make sense to me, particularly if the performance is equal over the lifetime of either type of plug.

    Does this sound about right?
     
  18. Dec 10, 2013 at 6:02 AM
    #158
    garys05tacoma4x4

    garys05tacoma4x4 OneLife

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    Synthetic oil/lubes used throughout. NGK Iridium Lazer 100K spark plugs. Rear differential breather extension modification. Toyota front skid plate, roof rack, bed mat, chrome exhaust exhaust. Runs like new!

    I used the NGK iridium plugs the 2nd time around. They are a 100k plug. Runs like new. About 25K on iridium plugs now. See my other posts for further detail. Why would I waste my time, money and inconvenience myself to have plugs replaced at 30K, ridiculous. Toyota dealers looking for your money!
     
  19. Dec 10, 2013 at 10:42 AM
    #159
    30coupe

    30coupe Well-Known Member

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    Yeah, that's kind of my take on it too. They will be looking a long time to get my money though...service and maintenance happens in my garage! :devil:
     
  20. Dec 10, 2013 at 5:57 PM
    #160
    DoorDing

    DoorDing Thank you, Nancy Roman

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    Since the Dawn of Time, two warring factions have ruled the Guild of Toyota Service Managers. The Evil Copper Plug Coven sucks the life force of their customers, and installs copper spark plugs at every turn. The Enlightened Iridium Service Angels install iridium spark plugs in every vehicle, as they are the true Guardians of all that is Good in this realm.

    Toyota dealers looking for your gold! Beware the Copper Coven!


    Or...

    Dealerships install whatever parts Toyota specifies.


    I'm going with the latter explanation.
     
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