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Coil Pack Boots Stuck to Spark Plugs

Discussion in '1st Gen Tundras (2000-2006)' started by Dook55, Sep 1, 2024.

  1. Sep 1, 2024 at 9:16 AM
    #1
    Dook55

    Dook55 [OP] RCLB Guy

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    Last time I changed plugs, maybe 60K miles ago, I had some rotten coil boots so I bought a Denso boot kit and replaced them. About half of those new boots married the plugs and divorced the coils when I forcibly removed them. So now I can't get a socket on the plugs to remove them.
    Is this common? Is there a special tool to get the boots out? When I go back together, is there some lubricant I should put n the boots so this doesn't happen again?

    I still have all factory 90080-19027 original type coils in mine. Over the last 270K miles I have replaced some cracked ones with good used ones having the exact same number. Now those used ones are too hard to find.
    I understand that many here say the cracked OEM coils are OK to use as long as there are no problems, which I guess I will do for a while. Over the years I have had one cracked and one not cracked coil throw a code. I still have a few good cracked coils set aside. Someday I will have to bite the bullet and buy new coils and I don't want to pay $690 for a set from the dealer.
    Denso does not sell 90080-19027 coils and there is a replacement they have for them. I think part# 099700-2520, are these as good as the originals? Can I mix them with originals or should I switch all 8 at one time?
    Also I jut purchased some new Denso iridium plugs number IK20-5304. I assume they are gapped at .043". I have read that you can damage the needle electrode just checking the gap. Is there a special method or something?
     
  2. Sep 1, 2024 at 9:32 AM
    #2
    jerryallday

    jerryallday New Member

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    I run Denso bought on rockauto.
    It’s the same thing to me.
    even looks like the Toyota logo was shaved off.

    below photo is the OEM coil
    IMG_9968.jpg
    Buy the Denso 673-1303
    from rockauto I have about 45k miles on them
    IMG_0074.jpg
     
    Dook55[OP] likes this.
  3. Sep 1, 2024 at 9:37 AM
    #3
    ColoradoTJ

    ColoradoTJ Certified tow LEO Staff Member

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    When you install new boots, use some dielectric grease in each one. You will never have issues pulling the coil packs again.
     
  4. Sep 2, 2024 at 3:56 AM
    #4
    bfunke

    bfunke Tundra Curmudgeon

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    This
    upload_2024-9-2_6-56-11.jpg
     
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  5. Sep 2, 2024 at 8:40 AM
    #5
    3bears

    3bears New Member

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    while I have not done a tune up on this tundra, but on my 4runner when I got it, one of those boots stuck to a plug...there is no tool to get around it. I used a pick to go between plug and boot to loosen it, then had to use some super long skinny needle nose pliers to pull it out in pieces, then when I could see I could get the plug wrench on, I vacumed out the little crumbs first
     
  6. Sep 3, 2024 at 12:20 PM
    #6
    FishNinja

    FishNinja HIDE YOUR DAUGHTERS

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    I put the lightest coat of this on mineIMG_5036.jpg
    You can get it at the freight for $8(?)
     
  7. Sep 4, 2024 at 8:09 AM
    #7
    Dook55

    Dook55 [OP] RCLB Guy

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    Removing the stuck boots was not easy. I bought a set of Harbor Freight long needle nose hose remover pliers (see pic) and they did NOT help. I ended up grinding a long screwdriver to a chisel point and gouging the area that grips the plug, then spraying lots of silicone spray in there so it would release and slide up the tube. Then blew out with air. I bought a new set of Denso boot kits.
    Considering I am using some cracked coils, I think replacing the Denso grommet washers (included in the kits) on the coils frequently is a good idea to keep them dry.
    After 66K miles, the existing Denso SK20R11 iridium plugs were completely shot and wide gapped but ran fine. I installed Denso IK40-5304 iridium plugs at .043" gap and put dielectric grease on the boots where they grip the plugs.
    Thank you all for replies to this thread.

    ignition 003.jpg
    ignition 005.jpg
    ignition 007.jpg
     
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  8. Sep 4, 2024 at 8:39 AM
    #8
    3bears

    3bears New Member

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    same company has a cheaper version, that I use, it is also dielectric, just does not say it in BIG print, but does say it on the front.
    and in my earlier post when I said long needle nose, i meant hemostats
     
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  9. Sep 4, 2024 at 3:34 PM
    #9
    Dook55

    Dook55 [OP] RCLB Guy

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    Good idea, I'll pick up a pair next time I go to a gun show.
     
  10. Sep 5, 2024 at 4:01 AM
    #10
    tvpierce

    tvpierce Formerly New Member

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    I guarantee those are not iridium plugs. In my experience, true iridium plugs will look brand new at 120K miles. Did you buy them on Scamazon or Ebay?
     
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    KNABORES and Dook55[QUOTED][OP] like this.
  11. Sep 5, 2024 at 5:12 AM
    #11
    Dook55

    Dook55 [OP] RCLB Guy

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    You may be right. I bought them from NAPA.
    The new ones I bought from Denso direct off their website. I think I'll have to buy all my plugs that way from now on.
     
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  12. Sep 5, 2024 at 5:31 AM
    #12
    shifty`

    shifty` Saturn ascends. Choose one or ten.

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    I agree, the tip shouldn’t be that far gone, although they are notorious (per internet enthusiasts) for the tip blowing out before NGK. believe Denso has a 80k lifespan on that plug. The NGK are 100k I think, specs are similar, tiny difference in diameter (like 0.1mm?) on the iridium tip. I went with the Denso.
     
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  13. Sep 5, 2024 at 5:38 AM
    #13
    tvpierce

    tvpierce Formerly New Member

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    I stand corrected. I just looked at Denso's web site, and it appears they offer at least 3 variants of iridium plugs -- each with a longer change interval: Iridium Power, Iridium TT, and Iridium Long Life.
    The Denso iridium plugs I've used in past Toyota cars have I guess been either TT or Long Life. When I replaced them at 120K miles, the electrodes still looked brand new. I did get counterfeit iridium plugs once from ScAmazon -- obviously I didn't know they were counterfeit at the time. But after 40K miles they started misfiring. When I took them out, they looked like yours.
     
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  14. Sep 5, 2024 at 6:01 AM
    #14
    Dook55

    Dook55 [OP] RCLB Guy

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    ignition 008.jpg
    Those Denso SK20R11 I removed are shown as long life on the Denso website, so your first guess may be correct.
    https://www.densoproducts.com/denso-3297-sk20r11-iridium-long-life-spark-plug
     
  15. Sep 5, 2024 at 6:15 AM
    #15
    Dook55

    Dook55 [OP] RCLB Guy

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    If I put dielectric grease on the coil ends of the boots, they might stay on the plugs when I remove the coils.
     
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  16. Sep 5, 2024 at 6:34 AM
    #16
    Mustanley

    Mustanley Two time totaler

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    NGK 50K mile rated iridium plugs pulled after 70K miles. My coils came off without any fuss. I would imagine climate has a lot to do with this. I also add a dab of dielectric grease inside the tip of the boot but leave the outside of the boot dry. Probably wouldn't hurt to put a thin coat on the outside of the boot though to prevent them from getting stuck inside the tubes.

    PXL_20240807_000211917.MP.jpg
     
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  17. Sep 5, 2024 at 8:53 AM
    #17
    bfunke

    bfunke Tundra Curmudgeon

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    Coil Boots don't make any contact on the outside. Just a dab at the inside is what you need.
     
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  18. Sep 5, 2024 at 12:32 PM
    #18
    tvpierce

    tvpierce Formerly New Member

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    If those are supposed to be Denso Long Life plugs that should last 100K miles, I'd bring them back to NAPA and ask what's up with their supplier.

    This is what they should look like after 100K+ miles.
     
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