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Spark Plug Shot Out Of The Engine

Discussion in 'Early CJ5 and CJ6 Tech' started by jeepstar, Aug 19, 2018.

  1. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    How? Why? 134 fhead. Was driving it along and POW!
     
    jeepstar, Aug 19, 2018
    #1
  2. 73 cj5

    73 cj5 Not ready for the junkyard yet

    It could’ve come loose from heat and vibration, it wasn’t tightened down enough, or damaged threads.
     
    73 cj5, Aug 19, 2018
    #2
  3. rusty

    rusty Well-Known Member

    First guess, ? Not tight. Second guess, threads worn in spark plug hole. Makes a heck of a noise.
     
    rusty, Aug 19, 2018
    #3
  4. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Yeah. New plugs and wires are going on today!
     
    jeepstar, Aug 19, 2018
    #4
  5. heavychevy

    heavychevy Sponsor

    Wow, never heard of that before. Any of the other plugs loose?
     
    heavychevy, Aug 19, 2018
    #5
  6. 58 willys

    58 willys Sponsor

    Ford 5.4 liters use to do it a lot
     
    58 willys, Aug 19, 2018
    #6
  7. jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Didnt check any of them. This is a new to me jeep, so i havent changed them or checked them yet
     
    jeepstar, Aug 19, 2018
    #7
  8. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Mine still does....:steamed: :steamed: :steamed:
     
    PeteL, Aug 19, 2018
    #8
  9. 1957Willys

    1957Willys Member

    It blew out from all the horse power that a F134 makes.
     
    1957Willys, Aug 19, 2018
    #9
    tripilio, dozerjim, 47v6 and 5 others like this.
  10. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Had that sorta happen once on a Ford V6- blew the ceramic right out of the steel part- made a hell of a racket driving it home :D.
     
    Howard Eisenhauer, Aug 19, 2018
    #10
  11. montanacj

    montanacj Member

    If it was my Jeep I’d go over the vitals with a wrench. Make sure all the tie rods have cotter keys and brakes and steering look tight too.
    I bet that noise scared the crap out of you ? It would have scared me that’s for sure.
     
    montanacj, Aug 19, 2018
    #11
  12. ojgrsoi

    ojgrsoi Retired 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I had a corvan that blew a spark plug and then was firing outside under the engine cover. That was loud.
     
    ojgrsoi, Aug 19, 2018
    #12
  13. Focker

    Focker That's a terrible idea...What time? Staff Member

    X2
     
    Focker, Aug 20, 2018
    #13
  14. Keys5a

    Keys5a Sponsor

    I'm assuming to blew the porcelain out of the threaded base, leaving the hexagonal base with the head? I've seen this happen before, but never on an old Jeep.
    -Donny
     
    Keys5a, Aug 20, 2018
    #14