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Tappet adjustment on F-134

Discussion in 'Early CJ5 and CJ6 Tech' started by Bill67cj5, Jan 9, 2016.

  1. Jan 9, 2016
    Bill67cj5

    Bill67cj5 Member

    Franklin, TN
    Joined:
    Apr 12, 2014
    Messages:
    86
    Had some knocking going on so decided to adjust intake and exhaust tappets/valves last weekend. Went through the whole procedure (you tube Hanibal 16577: 2 great videos on how to do correctly). Checked and double checked the gap at .016 exhaust and .018 intake and then put all back together w new gaskets, etc. started her back up and lo and behold, a little noiser than before at a little higher pitch. Went for a ride and also seems to be idling at higher rpm. Haven't put a tach on it yet but will this weekend.
    So, ideas on: a. Why noiser? And b. Why rpm higher?
    Thanks guys for your help.
    Bill
    67CJ5
     
    Bill67cj5, Jan 9, 2016
    #1
  2. Jan 9, 2016
    47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

    USA
    Joined:
    Oct 25, 2006
    Messages:
    5,801
    When I built my Fhead, it always made a lot of valve train noise. I adjusted the tappets many times and I never got the noise to go away. I had never heard an Fhead run before I did it, so I assumed that it was either something I did wrong, something wore out or they just made valve train noise. I am sorry I cannot answer your question, maybe someone else can and at the same time maybe elucidate me on my own similar issue.
     
    47v6, Jan 9, 2016
    #2
  3. Jan 9, 2016
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,126
    I'm having the same issue, after adjusting the valves I actually pulled the oil pan to make sure it wasn't excess clearance on a rod bearing.

    I can live with it but it's annoying. I've been told it could be related to a weak valve spring.

    H.
     
    Howard Eisenhauer, Jan 9, 2016
    #3
  4. Jan 9, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    To me it seems backwards that the intake valves need a higher clearance than the exhaust. I've got the same noise complaints too. :confused:
     
    Glenn, Jan 9, 2016
    #4
  5. Jan 9, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    Since you would have had to disconnect accelerator linkage to get the valve cover off I would at first suspect something going on with that.....maybe binding or return spring not as tight so not pulling linkage all the way back?
     
    Glenn, Jan 9, 2016
    #5
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