1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

F Head Spark Plugs

Discussion in 'Early CJ5 and CJ6 Tech' started by sbu22, Dec 5, 2010.

  1. Dec 5, 2010
    sbu22

    sbu22 Member

    New Orleans
    Joined:
    Nov 15, 2008
    Messages:
    72
    I'm having a mech do some work to my 60 CJ5. I'm out of town, so I'm going by what the guy is telling me over the phone. It goes like this:

    I asked him to put new plugs in it. From several posts here, I understand that while the FSM recommends a J8 plug. However, the current J8 is about 1/8" "shorter" than it should be. The Champion L86C was a recommended replacement.

    So, I have the guy get the Champion L86C and install. He tells me that when it runs, he can hear gasses escaping through the plug bores - with the plugs securely installed.

    Did I spec the wrong plugs ? Or, do I have highly worn threads in the plug bores? If it's leaking gas, I assume that it will erode the bores.

    Any input from y'all will be much appreciated.
     
    sbu22, Dec 5, 2010
    #1
  2. Dec 5, 2010
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,383
    I use Autolite 295 plugs, they work fine. I don't know what the deal is with the gases escaping.
     
    Glenn, Dec 5, 2010
    #2
  3. Dec 5, 2010
    dos equis

    dos equis anybody can restore one

    high rolls n.m.
    Joined:
    Oct 29, 2009
    Messages:
    21
    did he use the gaskets ?many new style plugs use a tapered seat,if he is young he might not know of the gaskets
     
    dos equis, Dec 5, 2010
    #3
  4. Dec 5, 2010
    sbu22

    sbu22 Member

    New Orleans
    Joined:
    Nov 15, 2008
    Messages:
    72
    Glenn - appreciate the info.

    Dos - I don't know, but I'll check with him. I guess there's a good reason they supplied them with the plugs.

    Thanks for the input, gents.

    Trying to keep forward motion on the jeep project by long distance may not be the smartest move I've made. Really want to have it on the road by spring.
     
    sbu22, Dec 5, 2010
    #4
  5. Dec 5, 2010
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,383
    Good call on the gaskets, could be the problem.
     
    Glenn, Dec 5, 2010
    #5
  6. Dec 19, 2010
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor

    New Kent, VA
    Joined:
    Jun 21, 2005
    Messages:
    2,011
    I just called advanced auto looking for champion l86c plugs, and they said they didn't have any, but the Autolite 425 crossreferenced to this. They also said there isn't an Autolite 295. Did they change the part numbers again?
     
    givemethewillys, Dec 19, 2010
    #6
  7. Dec 19, 2010
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,383
    I bought Autolite 295 plugs earlier this year from Advance Auto.
     
    Glenn, Dec 19, 2010
    #7
  8. Dec 19, 2010
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,383
    Glenn, Dec 19, 2010
    #8
  9. Dec 19, 2010
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor

    New Kent, VA
    Joined:
    Jun 21, 2005
    Messages:
    2,011
    wow I'm glad I didn't go pick them up! COMPLETELY different plug!
     
    givemethewillys, Dec 19, 2010
    #9
  10. Dec 19, 2010
    napaguy

    napaguy Banned

    goldendale wa
    Joined:
    Sep 25, 2009
    Messages:
    441
    295 is still a good autolite number just sold some last week:)
     
    napaguy, Dec 19, 2010
    #10
  11. Dec 20, 2010
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor

    New Kent, VA
    Joined:
    Jun 21, 2005
    Messages:
    2,011
    Yeah I searched on advanced auto's website and it said they had some in stock at that location.... don't know what the parts girl was doing? I'm gonna pick some up today and hopefully I can get the Jeep started :)
     
    givemethewillys, Dec 20, 2010
    #11
  12. Dec 20, 2010
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,383
    Earlier this year I walked into the one near me and said plainly: I need 6 Autolite 295 spark plugs. Of course the parts girl goes straight to the computer and says what vehicle is this for? :D Most of the employees are Spanish speaking, so the guy there immediately tells her in Spanish where they were located. I could tell that he was telling her that I had already said exactly what I needed. It was ok though, cause she was young and good lookin! :D
     
    Glenn, Dec 20, 2010
    #12
  13. Dec 22, 2010
    sbu22

    sbu22 Member

    New Orleans
    Joined:
    Nov 15, 2008
    Messages:
    72
    Finally got home and checked in on the CJ. dos equis, you called it. The young mech left out the "gaskets" - it's running like a champ now. Once again, appreciate all the helpful advice. Don't know what I'd do without this site - essential if you're not a gearhead. Y'all have a great Xmas and New Year!
     
    sbu22, Dec 22, 2010
    #13
  14. Dec 22, 2010
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor

    New Kent, VA
    Joined:
    Jun 21, 2005
    Messages:
    2,011
    I think its pretty easy to leave those out if you aren't paying attention. I just replaced mine and went throught the boxes afterwards based on this thread, and wouldn't ya know, I had a gasket in one of the boxes. Oops!
     
    givemethewillys, Dec 22, 2010
    #14
New Posts