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tight sparkplugs in 07 4.0

Discussion in '2nd Gen. Tacomas (2005-2015)' started by johnny 5, Dec 30, 2011.

  1. Dec 30, 2011 at 8:17 PM
    #1
    johnny 5

    johnny 5 [OP] Well-Known Member

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    Anyone have trouble getting their plugs out on a 4.0? changed em at 50,000
    and now at 102,000 they want to come out very hard. I antiseized the old ones can't figure it out. Iam worried about stripping threads out. I have sprayed oil down in and soaked they crack loose but then bind real hard. Anyone put alot of force to get theirs out?
     
  2. Dec 30, 2011 at 8:40 PM
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    RCBS

    RCBS "Cause I'm mighty proud of that ragged old flag."

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    Are you changing them cold? Might try getting engine up to operating temp and changing the plugs while theyre still warm. Did they go in tight when you changed them? Is it just one or two, or all?
     
  3. Dec 30, 2011 at 8:41 PM
    #3
    BUZZCUT

    BUZZCUT Well-Known Member

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    Shoot some carb cleaner in the holes let em sit. You may have to do this a couple times. The carbon has built up making it difficult. Remember to do this on a cold engine only.
     
  4. Dec 30, 2011 at 8:44 PM
    #4
    RCBS

    RCBS "Cause I'm mighty proud of that ragged old flag."

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    Carbon is also what I'm thinking. Or the antiseize is caking.
     
  5. Dec 30, 2011 at 8:59 PM
    #5
    johnny 5

    johnny 5 [OP] Well-Known Member

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    no when I put in the first set at 50 they went in nice by hand and I snugged em good. Yes engine is cold but I have seen others are recommending a warm removal try. I actually got one out, it was a little tight but the others are binding real good. Thanks for suggestions I will soak some more and be patient. Also using the Denso plug again and yes I had ngk on one side also the first time I changed em when it went smoothunlike now!!!!
     
  6. Dec 31, 2011 at 10:32 AM
    #6
    RCBS

    RCBS "Cause I'm mighty proud of that ragged old flag."

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    If you threaded them in ok, I can't see them stripping on the way out. Only way they would strip IMO, is if you have them cross-threaded.

    Please report back once you get them out.
     
  7. Dec 31, 2011 at 10:37 AM
    #7
    steve o 77

    steve o 77 braaap

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    Don't try a warm removal, that will just make things worse. Just keep soaking them, don't force anything
     
  8. Dec 31, 2011 at 10:39 AM
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    RCBS

    RCBS "Cause I'm mighty proud of that ragged old flag."

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    How so?
     
  9. Dec 31, 2011 at 10:41 AM
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    steve o 77

    steve o 77 braaap

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    Ive always heard having the engine warm makes the aluminum head want to stick to the steel plug which can cause stripping of the threads. Steel and aluminum naturally want to stick together anyway, thats why we use anti seize.

    Just my opinion.
     
  10. Dec 31, 2011 at 10:51 AM
    #10
    RCBS

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    Gotcha. I think the expansion of the aluminum from the heat would be more of a help than hindrance.

    I'm still sticking (intended) with the carbon/dried anti-seize gumming up the threads theory. :)
     
  11. Dec 31, 2011 at 10:53 AM
    #11
    steve o 77

    steve o 77 braaap

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    agreed, just needs a good soaking.
     
  12. Dec 31, 2011 at 12:00 PM
    #12
    Maticuno

    Maticuno Resident Pine Swine

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    This was more of an issue with the Ford 5.4L V8's. My old F-150 had this happen. Because Ford didn't design the head with enough thread thickness, the slightest over torquing or mismatch of plug and head temperature would cause a failure in the threads and eject the plug.
     
  13. Dec 31, 2011 at 12:13 PM
    #13
    Fortech

    Fortech Well-Known Member

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    I agree with the anti seize caking.

    The last time I changed my plugs it was unreal. 1/2" drive ratchet with an extension handle and I had to work like a bitch to get them out a couple of threads at a time. Add penetrating oil, wait 5 mins, get them out another couple of threads. I figured I was going to strip the heads for sure.

    I've noticed each time I change the plugs it gets harder and harder. Gonna try and clean out the threads with a thread chaser as soon as I get the truck back from the dealership.
     
  14. Dec 31, 2011 at 12:26 PM
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    RCBS

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    Don't forget to crank the engine over with all the plugs out to blow any of the crud out that falls into the cylinders.

    I use a smudge of high temp grease on my threads and haven't had any issues with binding.
     
  15. Dec 31, 2011 at 2:41 PM
    #15
    johnny 5

    johnny 5 [OP] Well-Known Member

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    Good news Good news! I got the plugs out with no damage. I took them out at running temperature after soaking with penetrating oil. Cold they were tight warm they came out relatively easy and new Densos went in no problem. Used plenty of antiseize to. What a nerve racking job not knowing what I would find till the plug was out. Left side isn't bad a bracket to loosen a connection and hose you can get at em pretty easy. Thanks for all the suggestions!!!
     
  16. Dec 31, 2011 at 4:03 PM
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    RCBS

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  17. Dec 31, 2011 at 5:44 PM
    #17
    Utard

    Utard Well-Known Member

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    Had this happen before on a Pontiac. Uncool.
     
  18. Dec 31, 2011 at 5:48 PM
    #18
    Fortech

    Fortech Well-Known Member

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    That's likely the problem - it dries up and cakes, clogging the threads. Acts more like Loctite than anti-seize. It's one of those instances where less is more.
     
  19. Dec 31, 2011 at 9:19 PM
    #19
    steve o 77

    steve o 77 braaap

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    glad it worked out for you. I think the warmth kinda loosened up the caked on antisieze helping them come out.
     
  20. Jan 1, 2012 at 2:55 PM
    #20
    johnny 5

    johnny 5 [OP] Well-Known Member

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    I think you guys are right too much antiseize I should pull them out again and wipe off some antiseize or I will have this problem again wonder about changing to Denso irridiums and forgetting about changing em again they should last atleast 100,000?
     
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