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

1970 134 Fhead Head Gasket Replacement

Discussion in 'Early CJ5 and CJ6 Tech' started by jeepstar, Nov 14, 2016.

  1. Nov 14, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
    morning all!
    tonight I plan on replacing my head gasket on my fhead motor. anybody here have the torque specs for those bolts? I have a chilton manual, but I'm wondering if the FSM everybody always talks about provides a different spec?

    thank you all in advance, and hopefully this will only take an hour, or 2 at most.
     
  2. Nov 14, 2016
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,904
    Chilton's, Hayes, etc, are junk compared to a factory FSM. Just so you know.

    My FSM shows 60 to 70 ft/lbs for the F-head. Also there is a recommended tightening sequence/pattern to be followed.

    Run a tap into the threads to clean them first.
     
    73 cj5 likes this.
  3. Nov 14, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
    Whats the sequence? (2 would be the carb bolt) 8 and 9 would be towards the front of the motor

    1 2 3
    4 5
    6 7
    8 9
     
  4. Nov 14, 2016
    Twin2

    Twin2 not him 2020 Sponsor 2019 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    4,201
    I agree get yourself a copy of FSM
    CAM00363.jpg
     
  5. Nov 14, 2016
    Focker

    Focker That's what I do, I know things and I fix stuff. Staff Member 2019 Sponsor

    Tri-Cities WA
    Joined:
    Aug 18, 2014
    Messages:
    6,646
    X2
     
  6. Nov 14, 2016
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    6,295
  7. Nov 14, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
    that national lampoon cover would never fly in todays PC world. I have always found it humorous though.
     
  8. Nov 14, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
  9. Nov 14, 2016
    Twin2

    Twin2 not him 2020 Sponsor 2019 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    4,201
  10. Nov 14, 2016
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    21,064
    Sure it would. It's obviously a joke ... on the cover of a humor magazine. "Edgy" at worst.

    Funny. (y) Howard, did you make that just for this post? We ought to use it regularly.

    I wonder how they got the dog to keep his head straight and look to the side. I suspect that he turned his head in the next half-second.
     
  11. Nov 14, 2016
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
    Messages:
    2,793
    Take that picture showing the tightening sequence and put in all your head bolts finger tight.
    then set your torque wrench for 30 footpounds and tighten in sequence follow the picture.
    then set your torque wrench for 60 footpounds and tighten in sequence again. Now you can either stop here or reset the torque foe 70 footpounds and do it again.
    Wait about 15 minutes and then do the sequence one more time at 70 footpounds. (or 60 footpounds if you stopped there.) )

    After you have put everything back onto your engine and are ready to start it, then start it and get it good and warm. You know, drive around a little.

    now you want to take off both the carb and the valve cover for the intake valves, and go through the sequence again at whaterver your final setting on your torque wrench was and re-torque all the head bolts.
    Now put everything back on the engine that you just took off and you should be done.
     
  12. Nov 14, 2016
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    6,295
    Be that as it may you have 72 hours to come up with a FSM or the cute little doggie Is Done.
     
  13. Nov 14, 2016
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,904
    x2!
     
  14. Nov 14, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
    Let the dog go. I have a digital full service manual!
     
  15. Nov 14, 2016
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,904

    Okay, but we want a full report on the outcome.

    th-1.jpeg
     
  16. Nov 14, 2016
    mortten

    mortten I can’t put my finger on it

    Peninsula, Ohio
    Joined:
    Apr 17, 2006
    Messages:
    1,363
    Disclaimer: There were no animals injured in the making of this thread. :)
     
    1955jeepcj5inabox likes this.
  17. Nov 15, 2016
    Rick Whitson

    Rick Whitson Detroit Area 2020 Sponsor 2019 Sponsor

    I live South of...
    Joined:
    Dec 2, 2014
    Messages:
    1,206
    You guys are the reason I go to this site everyday. Thanks.
     
  18. Nov 15, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
    Since I have all the coolant drained out, should I put in a new thermostat? Along with my 7 pound radiator cap?
     
  19. Nov 15, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    9,845
    Yes on the new thermostat and of course use the 7 pound cap. Make sure the new thermostat has a bypass hole. That will eliminate trapped air.
     
  20. Nov 15, 2016
    jeepstar

    jeepstar Well-Known Member 2020 Sponsor

    Sheboygan
    Joined:
    Jun 28, 2006
    Messages:
    1,554
    Spray gasket sealant. If anybody has any better Solutions than this substance let me know now. Of course I'd be spraying an actual head gasket 20161115_143309.jpg
     

Share This Page

New Posts