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

Test Drive gone wrong

Discussion in 'Early CJ5 and CJ6 Tech' started by IA2003, Jan 1, 2015.

  1. Jan 3, 2015
    IA2003

    IA2003 Member

    Ewa Beach, HI
    Joined:
    Mar 17, 2011
    Messages:
    84
    I am leaning towards a bad mixture as I have no idea how to properly tune the Solex. The fan belt is not loose. I will take a look at the radiator and give it a wash.
     
  2. Jan 3, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,367
    Thank you for the answers to our questions. ;) The Solex doesn't like more than 1 1/2 or 2 psi inlet pressure. You might need to install a fuel pressure regulator. There isn't really any adjustment other than the idle screw air mixture. If it's running rich the fuel pump could be pushing fuel past the needle valve. When you have had it sitting and running has it gotten up to operating temperature and have you verified the thermostat opens? I like to keep checking the upper hose for temp to verify what the thermostat is doing. If it smelled hot then it was pretty darn warm, but.......if the engine is not broken in from the rebuild that can somewhat account for that.
     
  3. Jan 3, 2015
    IA2003

    IA2003 Member

    Ewa Beach, HI
    Joined:
    Mar 17, 2011
    Messages:
    84
    I just installed a new fuel pressure regulator from www.kaiserwillys.com and set it to 1.5 psi. I need to verify that the thermostat opens. How exactly do you do that?
     
  4. Jan 3, 2015
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    5,407
  5. Jan 3, 2015
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
    Joined:
    Dec 5, 2013
    Messages:
    1,694
    Keep the radiator cap off and start the engine. Allow it to warm up, if you see the antifreeze circulating the thermostat opened
     
  6. Jan 3, 2015
    WorkInProgress

    WorkInProgress Member

    Kennewick, Wa
    Joined:
    Jul 15, 2012
    Messages:
    966
    Are you sure that you set it to 1.5 psi? kaiserwillys website shows it only goes as low as 1.75 psi.:tea:
     
  7. Jan 3, 2015
    tymbom

    tymbom Member

    Siskiyou Co.
    Joined:
    Jun 13, 2012
    Messages:
    814
    Take the thermostat out and put it in a pan of water on the stove top. When it gets warm it should open
     
  8. Jan 4, 2015
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
    Messages:
    1,132
    First, the overheating issue:
    Insure it is in fact overheating. Run the engine up to operating temperature, then using your thirty dollar IR gun, compare the actual temperature with the one showing on the gauge. If the engine is in fact hot, look at:
    Bad thermostat. Drop it in a pan of water with a candy thermometer and observe the temp it opens. If it is slow or doesn't open all the way, replace it.
    Bad radiator cap. If the system won't hold pressure when hot, the engine will overheat. This is usually accompanied with a loss of fluid.
    Coil missing in the bottom radiator hose. The pump pulling water from the radiator can collapse the bottom hose if the "spring" or coil is missing.
    Plugged radiator core. You can usually see this by looking at the core through the inlet or filler neck. Debris, sealant, or scaling covering or stuck inside the cores will inhibit the flow of coolant. Most times, the radiator can be reversed flushed to knock out the offending gunk.
    Overly advanced timing. Double check to insure your not running too much advance.

    Charging.
    Check your system with a volt gauge. Alternators should be pushing 12.5 to 14 volts at idle with no load.
    Which alternator you're running will determine what/if you have wiring issues.

    Stalling.
    The fact you state it idles fine, but looses power while driving leads me to suspect the float bowl may be going dry, causing the engine to starve under load. You may have too little pressure going through the regulator, or the float height may be set too low.
    You may also want to check the breaker plate if it has one. I have seen the vacuum advance pull a bad breaker plate over, causing the points to close under high intake vacuum.
     
  9. Jan 4, 2015
    Alan28

    Alan28 Well-Known Member 2022 Sponsor

    Châtillon en...
    Joined:
    Oct 21, 2012
    Messages:
    2,327
    I am not a good technician but I have a F 134 so my ideas are :

    1 - Wife : I took her twice to the village and twice ... out of fuel! By chance it was in the village, not in the middle of nowhere. My adjustment of the fuel gauge was not perfect. Now, I have a small fuel spare tank in the Jeep.

    2 - F 134 : It took some years to have my Jeep running well. This summer this was perfect. Some weeks ago I had a problem, it seems that it is a spark plug... I received the new ones.

    Carburetor : I had to check it and clean it carefully. Checking the fuel pump (it is a Solex). Afterwards it was working perfectly, no need of anything more.

    Radiator : you empty the water in onpeing the screw on the engine. You check the color of the water (it is dangerous with antifreeze) after some drops you know if clean inside.

    water pump : you look inside the radiator, if the water moves, the fuel pump works when hot (the thermostat opens).

    Empty battery : there is something wrong somewhere : my battery always work. You put on the lights at idle, at night, and you accelerate so you see if more power in the light.

    There is some mystery in your engine. Is your pro-shop who made repairs far from your house? Maybe the ignition is badly made/fixed ?
    Was it made by them?

    I hope that you have a good parking place for your Jeep. This model is safe, and robust. Take time to check all or find a pro who can do it, it is easy to control ignition.
    Solex carb is safe too.
    Fuel pump : easy to check.
    Do you have good fuel in your tank? Put some additive for old engines in the fuel if necessary. It can help.

    And very good specialists are on this forum.

    Just avoid to repair various parts at the same time, an interference can happen. Good luck. Be patient, it will work. And your wife will be happy.
     
  10. Jan 4, 2015
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    9,754
    If you are going to do this, suspend the termostat so it is not resting on the bottom of the pot. The pot will be hotter than the water, and it is the water temperature that should be monitored for accuracy.

    And as Alan says, do one thing at a time, to maintain a logical progression.
     
  11. Jan 4, 2015
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
    Joined:
    May 30, 2006
    Messages:
    1,918
    Drill a small hole in the thermostat 1/8" or so to prevent air lock. Also a fan shroud is pretty important. It could also be timing. Exhaust getting very hot and heat soaked the starter
     
  12. Jan 4, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,367
    Exhaust heat can be hard on a starter but in this case the starter is on the opposite side. It was common in the 327 powered full size Jeeps for the starter to get hot. I had it happen to mine. Good reminder on the thermostat hole.
     
  13. Jan 4, 2015
    PierreDnepr

    PierreDnepr Member

    Barrie Ontario
    Joined:
    Sep 4, 2013
    Messages:
    218
    There is a plastic screen in the solex carburetor that is often shove in there at assembly and broken it may be impeding the flow of fuel. The screen can be access near the fuel inlet. I would also take the float bowl out and make sure the float and needle is working properly.


    Hope this help
     
  14. Jan 4, 2015
    Alan28

    Alan28 Well-Known Member 2022 Sponsor

    Châtillon en...
    Joined:
    Oct 21, 2012
    Messages:
    2,327
    it looks like by some aspects a bad timing or an ignition problem, because no power in action, but good idle.
    And as said before the engine is heating more. Maybe it is something easy to check. I had this problem long ago on an old car.
     
  15. Jan 4, 2015
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
    Joined:
    May 30, 2006
    Messages:
    1,918
    and when checking out the timing make sure the distributor is advancing correctly
     
  16. Jan 6, 2015
    mwinks-jeep

    mwinks-jeep I still love snow, Godspeed, Barney!

    Beautiful Bucks...
    Joined:
    Feb 17, 2009
    Messages:
    800
    I did this too!!! Turned out in my case to be a blessing in disguise because my HG replacement led to new rings etc...
     
  17. Mar 8, 2015
    IA2003

    IA2003 Member

    Ewa Beach, HI
    Joined:
    Mar 17, 2011
    Messages:
    84
    So I finally got some free time to trouble shoot. First, I added a 2 gauge ground cable from the alternator to the engine block which cured all the stalling and dead battery issues. Second, I removed the thermostat and it was locked in the closed position. I replaced it and all seemed to be well. I drove it for about 15 minutes and it began overheating again. Radiator is full of fluid. The only thing I can think of is that there is some sort of blockage or the water pump is bad. The water pump is new and was installed onto the engine by the machine shop that rebuilt the engine. Frustrated...
     
  18. Mar 8, 2015
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,367
    If you are saying you replaced the thermostat did you make sure it has a tiny weep hole? That helps prevent air from being trapped. Also, with the engine cold and the radiator cap off, start the engine and let it run and get up to operating temperature. Very carefully observe the fluid in the radiator to see if it starts circulating when it gets near operating temperature. You should be able to tell when and if the thermostat starts opening by observing flow into the top of the radiator, and if there are no flow issues the water in the radiator should not overflow. Do be very careful when observing in case it does by chance have some blockage which would cause it to gush out on you or in your face.
     
    Last edited: Mar 8, 2015
  19. Mar 8, 2015
    rusty

    rusty Well-Known Member

    norfolk,va
    Joined:
    Dec 16, 2006
    Messages:
    1,652
    Make sure your water pump is turning the right way. They are different.
     
  20. Mar 8, 2015
    WorkInProgress

    WorkInProgress Member

    Kennewick, Wa
    Joined:
    Jul 15, 2012
    Messages:
    966
    I had problems with overheating then coming down after the thermostat opened until I removed the new thermostat and drilled a very small hole in the outer solid ring and no more problems
     
New Posts