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Discussion in 'Early CJ5 and CJ6 Tech' started by buckcreek, Jul 25, 2007.

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  1. buckcreek

    buckcreek New Member

    Ok installed the solex yesterday afternoon and ran a fuel line to an boat gas tank, the cj fired right up and after about 30 seconds it seemed to sound like air coming from the carb. and it started to run like crap? shut down the engine and waited untill tonight to check the valve adjustment only adjusted the intake valve and tryed it again fired up and sounded like a brand new engine after about 30sec same crap?

    any ideas?
     
    buckcreek, Aug 9, 2007
    #21
  2. Glenn

    Glenn Kinda grumpy old man Staff Member

    Do you have the choke hooked up propery? Sitting on the F-head the choke in the off position is forward.
     
    Glenn, Aug 9, 2007
    #22
  3. buckcreek

    buckcreek New Member

    Yes its all the way forward , have not had to choke it to start yet.
     
    buckcreek, Aug 9, 2007
    #23
  4. blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Change plugs
     
    blevisay, Aug 9, 2007
    #24
  5. Don X

    Don X The Prodigal Moderator Staff Member 2023 Sponsor

    Billy, not questioning just trying to learn. Why would it not run rough at first. Do the plugs fire dfferently after they get warm?
     
    Don X, Aug 10, 2007
    #25
  6. Glenn

    Glenn Kinda grumpy old man Staff Member

    Ok, we've eliminated the choke. Tell us more, does it idle? Good, bad? How about high speed, did you let it run more than 30 seconds after the valve adjustment? More details please, it's impossible to diagnose something that is only run 30 seconds.
     
    Glenn, Aug 10, 2007
    #26
  7. blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    The Champion J8c plugs foul really easy in my experience. So if he had issues with the last Carb or left the mixture enrichment valve on the Solex in the rich position chances are the plugs are fouled. I found this out the hard way.:hurrican:

    Also when you go to adjust the solx make sure the eng is good and warm this also makes a difference.
     
    blevisay, Aug 10, 2007
    #27
  8. Glenn

    Glenn Kinda grumpy old man Staff Member

    No argument on the fouling, I've had them look fine but won't fire. Since it also smokes maybe it pumped enough oil to foul the plugs quickly?
     
    Glenn, Aug 10, 2007
    #28
  9. blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    UH HUH:)
     
    blevisay, Aug 10, 2007
    #29
  10. buckcreek

    buckcreek New Member

    how does it idle , after 30 sec the carb starts to sound like its spraying air, and then the idle starts going down and if you do not throttle it up it will die. all this time the smoke is getting pretty bad. And yes the plugs look bad removed them and cleaned them up with carb cleaner, reinstalled them and started it back up I let it run for about 10 mins giving it gas to keep it running, idles very slow and dies?

    during the 10 mins I let it run I removed one plug wire at a time to see if I had a dead cylinder no change in the sound of the engine.

    At this point gave up and went in the house.
     
    buckcreek, Aug 10, 2007
    #30
  11. buckcreek

    buckcreek New Member

    glen I also thought about the oil pumping up in to the cylinders and causing this also?
     
    buckcreek, Aug 10, 2007
    #31
  12. Glenn

    Glenn Kinda grumpy old man Staff Member

    Based on your description I doubt you'll ever get it running right till you tear into the engine. It does sound like it's pumping too much oil.
     
    Glenn, Aug 10, 2007
    #32
  13. buckcreek

    buckcreek New Member

    well got every thing removed except the head bolts , I ll get those tonight.
     
    buckcreek, Aug 11, 2007
    #33
  14. buckcreek

    buckcreek New Member

    Ok pulled the head off, dropped the oil pan, and pulled out the #1 piston.

    there is no ring groove and the rings are free and loose but the bevel on the inside of the rings How is it suppost to be turned up or down. Everything else looks great.

    Any idles .
     
    buckcreek, Aug 11, 2007
    #34
  15. Glenn

    Glenn Kinda grumpy old man Staff Member

    Bevel goes up, but the bigger issue is the oil rings. How do they look? How does the cylinder look?
     
    Glenn, Aug 11, 2007
    #35
  16. buckcreek

    buckcreek New Member

    no signs of any damage on the cylinder walls dont look like they put the cross hatch on the walls before they installed the pistons .

    As for the oil rings the gaps are not in a straight line they where off set about a 1/4 turn but thats all I know to look for any thing that I need to look at?
     
    buckcreek, Aug 11, 2007
    #36
  17. Glenn

    Glenn Kinda grumpy old man Staff Member

    Do the rings have plenty of expansion/spring to them? I don't remember if you mentioned it, was the engine bored? Proper sized pistons used if so?
     
    Glenn, Aug 11, 2007
    #37
  18. buckcreek

    buckcreek New Member

    not really sure of the engine had been bore or not the compression rings looked like they had plenty of spring to them not sure about the oil rings.
     
    buckcreek, Aug 11, 2007
    #38
  19. Glenn

    Glenn Kinda grumpy old man Staff Member

    Before you pulled the piston out did it look snug in the cylinder? Could you move it side to side at all, or can you move the others at all. Do the pistons have any numbers on top, like .010,.020,.030 etc?
     
    Glenn, Aug 11, 2007
    #39
  20. kaiser_willys

    kaiser_willys Well-Known Member

    had this happen to me ,rings were in the correct box but not the correct size,here is how i found out,remove the ring from the piston,put it in the cylinder,push it down into the normal area of travel with the piston then check to see how much of a gap is at the ends of the rings,cant rember what is accepttable but it isnt much of a gap,never had any luck puting a set of rings back in that were used at all,replace them,just my experience once you pull them out thats it they are trash
     
    kaiser_willys, Aug 11, 2007
    #40
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