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Knuckle Leaks

Discussion in 'Early CJ5 and CJ6 Tech' started by CJ51973, Aug 10, 2022.

  1. Aug 10, 2022
    CJ51973

    CJ51973 Member

    Versailles, KY
    Joined:
    Nov 6, 2009
    Messages:
    110
    Now that I am cruising at highway speed without fear of death it's time to get after the leaks. This is my first closed knuckle Jeep. The large felt seal I get. It appears to be seeping from the lower king pin cap. as well. It assembled correctly there should be no shim on the lower caps. Before I use "the right stuff" what is the preferred sealant on this cap? Thanks
     
  2. Aug 10, 2022
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    8,641
    Permatex #2 is my go-to.

    Also be aware that the bolts which hold the axle spindle tube and brake backing plate to the knuckle may leak into the brakes unless they are sealed too.
     
  3. Aug 10, 2022
    fyrmn

    fyrmn Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    High Desert AZ
    Joined:
    Apr 29, 2006
    Messages:
    180
    Check out “metalshapers” video on rebuilding these on yt.
    He uses this on threads. D9030901-3DAC-4D95-A550-A4334BD2DCA5.jpeg
     
    Stakebed likes this.
  4. Aug 10, 2022
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    8,641
    Also available a liquid in a brush-pot. Good stuff. In my experience the #2 is heavier/thicker, useful at times.
     
  5. Aug 10, 2022
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    7,608
    What are you using for knuckle lubricant?
     
  6. Aug 10, 2022
    Fireball

    Fireball Well-Known Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Pullman, WA
    Joined:
    Feb 9, 2018
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    4,117
    :poke: You know better!
     
  7. Aug 10, 2022
    Bearskin10

    Bearskin10 New Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Lakewood,CA
    Joined:
    Mar 6, 2019
    Messages:
    39
    LOL I know I've seen 1 or 2 knuckle pudding threads.....
     
    Tom_Hartz likes this.
  8. Aug 13, 2022
    jeepdaddy2000

    jeepdaddy2000 Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
    Messages:
    805
    Besides the felt seal, there is a rubber seal as well. Insure you replace that also. The split obviously goes in the up position.

    I like to pull the knuckle and run emery cloth over the knuckle sealing surface. I've found that most knuckles have a wear groove in the straight ahead position which can make sealing impossible.Doing this also give me a chance to inspect the lower (load bearing) and upper (the rusty, unlubed ) bearing as well as reset the bearing preload.
     
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