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E3 Diamond Spark Plugs

Discussion in 'Early CJ5 and CJ6 Tech' started by jeepstar, Jul 14, 2022.

  1. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    As part of my yearly tune up I installed 4 new spark plugs. Went fancy, I know. But any little thing I can do to help this old gal run smoother, I'm fine with that.
    Working from front to the firewall, the first 3 looked fine. The last one, closest to the firewall was covered in oil!! Is this bad, or REALLY REALLY BAD¿
    Resized_Resized_20220714_170517.jpeg
     

    Attached Files:

    jeepstar, Jul 14, 2022
    #1
  2. Glenn

    Glenn Kinda grumpy old man Staff Member

    Valve cover gasket leaking? It's not fouled so it can't be internal and couldn't get on the threads anyway.
     
    Glenn, Jul 14, 2022
    #2
    Rick Whitson, dozerjim, Vanguard and 3 others like this.
  3. FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    that is kind of weird....looks like the oil is seeping down the threads from outside (like a valve cover leak Glenn mentioned), as opposed to excess oil in the combustion chamber. The electrodes look dry and not fouled or carbon coated.
     
    FinoCJ, Jul 14, 2022
    #3
    Vanguard, dozerjim and jeepstar like this.
  4. kenb

    kenb Cleverly disguised as a responsible adult

    I agree with the above, Looks to me like run down oil from a leaky rocker arm cover gasket. Or from the oil line to the head? I can't remember what side of the block that's on. Can you post a photo of the porcelain part of the plug?
     
    kenb, Jul 14, 2022
    #4
  5. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    It's in the trash.
     
    jeepstar, Jul 14, 2022
    #5
  6. 58 willys

    58 willys Sponsor

    As said above plug not fouled would highly speculate the valve cover
     
    58 willys, Jul 15, 2022
    #6
  7. Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2022 Sponsor

    A leak from the rocker cover is the only thing that makes sense. Looks like it is time for an oil change too.
     
    Oldpappy, Jul 15, 2022
    #7
    Glenn likes this.
  8. Glenn

    Glenn Kinda grumpy old man Staff Member

    Let's hope a rod doesn't start knocking if he changes it. :)
     
    Glenn, Jul 15, 2022
    #8
  9. jeeper50

    jeeper50 jeeps 'till I die

    Main oil line is on the opposite side, swap the valve cover gasket and begin a watch to see if it returns
     
    jeeper50, Jul 15, 2022
    #9
  10. kenb

    kenb Cleverly disguised as a responsible adult

    IMG-20220716-WA0001.jpg
    This is the oil line I was saying you might want to check for a leak
     
    kenb, Jul 16, 2022
    #10
    jeepstar likes this.
  11. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Brakes went out:shock:, so its going to the shop to get looked at by a real mechanic. Brake failure don't bother me, it's my wife I'm more concerned about.
    I refilled the empty MC and had her pump the brakes as I was looking for leaks, but I didn't see anything apparent
     
    jeepstar, Jul 18, 2022
    #11
  12. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Review: I went back to the lawnmower sparkplugs today. It's been running fine, just not quite right. Installed 4 new AC Delco units, and took it for a drive. Ran smoother.
    Here are the 3 sparkplugs I removed. The last one i didnt include due to me not fixing that leaking oil return line.

    Resized_20220928_161128.jpeg
     
    jeepstar, Sep 28, 2022
    #12
  13. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    The E3 may be good for newer cars, but I really feel like it's a waste of money for my fhead
     
    jeepstar, Sep 28, 2022
    #13
    melvinm and Twin2 like this.
  14. colojeepguy

    colojeepguy Colorado Springs

    I tried a set in my 460 Ford and was underwhelmed.
     
    colojeepguy, Sep 28, 2022
    #14
    jeepstar likes this.
  15. danielbuck

    danielbuck Uncle Buck

    Same here, the cheaper plugs seem to be just fine for our engines, I tried E3 plugs and didn't really notice any difference at all. Back to regular ones :)
     
    danielbuck, Sep 28, 2022
    #15
  16. Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    Lawnmower plugs form Ace Hardwear work just as Good. Champion J 8 is what I have always used. Just saying.
     
    Rick Whitson, Sep 29, 2022
    #16
    Vanguard likes this.
  17. Jeepenstein

    Jeepenstein Me like Jeep.. 2024 Sponsor

    Personally I like Bosch super copper. Not that I have ever seen any improvement in anything, just my plug of choice..
     
    Jeepenstein, Sep 29, 2022
    #17
  18. Vanguard

    Vanguard Take Off! Staff Member

    Vanguard, Sep 30, 2022
    #18
  19. Jeepenstein

    Jeepenstein Me like Jeep.. 2024 Sponsor

    They have always served me well also..
     
    Jeepenstein, Oct 3, 2022
    #19