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Oil in spark plug tubes

Discussion in '2nd Gen Tundras (2007-2013)' started by malek, Aug 9, 2015.

  1. Aug 9, 2015 at 6:10 AM
    #1
    malek

    malek [OP] New Member

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    I have a 2012 4.6 tundra with a small issue. Maybe one of you can help me out here. I changed my spark plugs at 98.000 miles and there was oil in 2 of the spark plug tube. The dealer said it is coming from the cylinder heads but I can't get them to replace them with my warranty. They said it is normal. Has anyone else had this issue?
     
  2. Aug 9, 2015 at 7:29 AM
    #2
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    I don't believe that's normal...well, anything that I've heard before. I would get a 2nd opinion.
     
  3. Aug 9, 2015 at 7:47 AM
    #3
    mdavis

    mdavis Tiger Life

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    Sounds like the bullshit I was given with my Silverado with 40K miles.

    1. Why is my truck burning oil? Answer: Oh its designed to burn a quart of oil every 2000 miles.
    2. Why are my spark plugs covered in oil? Answer: Oil fouled sparks, Oh that's normal.
    3. So your not going to do anything about this? No, its all normal.
    4. Drove to Toyota and traded it in.
     
    Sean266 and Bob like this.
  4. Aug 9, 2015 at 7:57 AM
    #4
    malek

    malek [OP] New Member

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  5. Aug 9, 2015 at 8:00 AM
    #5
    Mike

    Mike Tread lightly.

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    yep bank account is running low from it..
    Normal NO.

    sounds like your valve guides have gone bad. Warranty nope your over miles.

    Keep a eye on it if it get worst head will need to be pulled so the valve guides can be replaced.
     
  6. Aug 9, 2015 at 8:00 AM
    #6
    malek

    malek [OP] New Member

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    Fortunately I don't have that kind of problem. This is the only issue I have ever had with the tundra. It has been a great truck . I Have Had Ford AND Chevy. Both left me on the side of the road.
     
  7. Aug 9, 2015 at 8:04 AM
    #7
    malek

    malek [OP] New Member

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    My father in law mentioned valve guides. I thought the valve cover had a seal that might have been bad but toyota said it doesn't have one. They said it has a metal seal that is pressed fit into the heads.
    Thanks
     
  8. Aug 9, 2015 at 10:47 AM
    #8
    garnaz

    garnaz New Member

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    Tube seals on valve cover leaking.
     
  9. Aug 9, 2015 at 12:13 PM
    #9
    Mike

    Mike Tread lightly.

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    yep bank account is running low from it..
    I can tell i need more coke cola in the morning on my only day off. UGH

    I was thinking you had oil on the inside on engine piston side. ( my fault) .. You have oil on the outside of the plug. garnaz is correct your tube seals are bad.
     
  10. Aug 9, 2015 at 6:20 PM
    #10
    bobeast

    bobeast really old member

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    What's normal is dealers telling customers that everything is normal, in hopes they will just go away.
     
  11. Aug 20, 2015 at 4:02 PM
    #11
    NCBMack

    NCBMack New Member

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    About 6 months ago I finally had my plugs changed in my 2012 4.6L at 200K miles. Same issue of oil in the tubes. my buddy works at the dealer so I asked him how long they thought oil had been in there. He said probably around 100K miles. I didn't fix it cause it didn't seem like it was really hurting anything. Since then I have another 30K miles and zero issue and no leaks or missing oil.
     
  12. Aug 20, 2015 at 7:15 PM
    #12
    LOTSOFTOYS

    LOTSOFTOYS New Member

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    It's probably the tube seals in the valve cover like someone else said.... not hard to replace. Grab a couple cover gaskets and 8 tube seals and make a morning of it;)
     
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