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#8 Spark Plug

Discussion in '1st Gen Tundras (2000-2006)' started by w666, Mar 29, 2020.

  1. Mar 29, 2020 at 3:56 PM
    #1
    w666

    w666 [OP] D. None of the above

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    A funny thing happened on the way to the forum (see what I did there?)...

    I changed my spark plugs this weekend, but I could not remove #8. It’s not like it was seized. I could unloosen it easily enough, but the more I turned it the harder it was to turn it. After several turns I found myself thinking about reaching for a breaker bar, but that seemed like a bad idea. I ran it back down and snugged it up, then tried again. Same result. All the other old plugs looked remarkably good (5 yr old Denso Iridium), so I let it go for now...7 new plugs and one slightly used in #8.

    Q: Has anyone had a similar experience? What could be causing it to bind more as I withdraw it?

    Q: Any ideas how to solve the problem? I’m terrified to try muscling it out for fear that it will snap off and leave me with a big problem. Right now I just have a little problem.
     
  2. Mar 29, 2020 at 4:16 PM
    #2
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Threads could be cacked up on ol’ lucky #8. The more you loosen the plug closer the cacked threads bind on the threaded portion of the hole. Just a theory on #8 even though the other plugs looked good, per your comment.

    Maybe #8 was cross threaded prior? Another theory.
     
    bmf4069, MS22 and hagrid like this.
  3. Mar 29, 2020 at 5:54 PM
    #3
    hagrid

    hagrid The most diverse of Diversity Hires!

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    If by "cacked" you mean deposits engaging the threads then I agree.

    Work the plug vor und zurück using best practices for threaded components.
     
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  4. Mar 29, 2020 at 6:03 PM
    #4
    TILLY

    TILLY Gently Used Member

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    Try loosening it a few turns then give it a squirt of PB Blaster or some equivalent down the threads and let it soak for a few minutes. Then give it the back and forth treatment others have suggested. Good luck.
     
    speedtre, bmf4069, tvpierce and 2 others like this.
  5. Mar 30, 2020 at 3:34 AM
    #5
    tvpierce

    tvpierce Formerly New Member

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    +1

    The type of fluid doesn't even matter -- PB Blaster, WD-40, brake cleaner -- you just need some fluid in there to help clear the threads. The back and forth action and patience are the keys. You can use this approach on any fastener that binds up like this.
     
    speedtre, bmf4069 and FrenchToasty like this.

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