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

Correct Compression For '62 Cj-5 F134

Discussion in 'Early CJ5 and CJ6 Tech' started by Tom Stephens, Apr 10, 2019.

  1. Apr 10, 2019
    Tom Stephens

    Tom Stephens New Member

    Arnold, CA
    Joined:
    Oct 29, 2018
    Messages:
    40
    My compression readings: #1 = 106, #2 = 106, #3 = 105, #4 = 109

    Too low, or just fine?

    Tom
     
  2. Apr 10, 2019
    PeteL

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

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    7,732
    Not too bad for a used f-head. The good news is that they are all very close to the same.
     
  3. Apr 10, 2019
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
    Joined:
    Apr 4, 2010
    Messages:
    5,367
    ^ I agree with Pete, the even numbers are good news!
     
  4. Apr 11, 2019
    Tom Stephens

    Tom Stephens New Member

    Arnold, CA
    Joined:
    Oct 29, 2018
    Messages:
    40
    I agree about the even numbers. I wonder if rebuilding would help the power output?

    Tom
     
  5. Apr 11, 2019
    PeteL

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

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    7,732
    It's an F-head. What power output?
     
  6. Apr 11, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    6,947
    New would be in the range of 120-125, bad would be 80-90. If you're not burning oil I'd drive like I stole it.:D
    Not noticeably.
     
  7. Apr 11, 2019
    Tom Stephens

    Tom Stephens New Member

    Arnold, CA
    Joined:
    Oct 29, 2018
    Messages:
    40
    Pete,

    That's :)

    Howard, it spills oil, it doesn't burn it ;-) I was checking the oil canister to see if it had a filter inside (so I could order a new one), and didn't get the gasket straight, it got oil EVERYWHERE, all over the engine, even in the passenger compartment.

    Perhaps I should start a new thread, let me know if I should, but I'll try this here: I found some old threads on replacing the carb (I have a Solex) with a Weber 32/36, or changing the ignition or doing both to get more power. I know "power" is not really the word, but I'd like to get 50-55mph up one of our 3-4% grades. I was doing 45mph the other day.

    Tom
     
  8. Apr 11, 2019
    PeteL

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

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    7,732
    Cruising at 45mph is just right for an F-head, as frequently discussed here. They were intended for off-road applications and their design precludes any easy power upgrades.

    Hell, I have trouble getting 55mph out of my '88 YJ, on any noticeable uphill. Jeeps have the aerodynamics of a brick.

    Make your second Jeep a V6 and use that one on the highway.
     
  9. Apr 11, 2019
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    6,947
    BTDT :(
     
  10. Apr 11, 2019
    PeteL

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

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    7,732
    Blew a cartridge filter clean off my M-715. Rustproofed that engine bay! And twenty years later you can still see the stain on the side of the house.
     
  11. Apr 13, 2019
    70cj5134f

    70cj5134f Member

    East Tn
    Joined:
    Aug 18, 2018
    Messages:
    749
    55 up slight grade, ant going to happen.
     
  12. Apr 14, 2019
    Jrobz23

    Jrobz23 Member

    Northern, WI
    Joined:
    Oct 3, 2016
    Messages:
    926
    Gauge calibrated?
    Valves checked?

    They seem close.
     

Share This Page

New Posts