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Dauntless runs hot at 60 plus

Discussion in 'Early CJ5 and CJ6 Tech' started by napaguy, Jul 28, 2011.

  1. Jul 28, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    Sep 25, 2009
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    I can drive around town all day at 35-40 and no problems

    Take it up to 60 plus and the temp gauge slowly climbs all the way to 210 ish

    New thermostat, new Stewart Warner electric gauge
    Where do I begin?
     
  2. Jul 29, 2011
    jeep67

    jeep67 Member

    Shasta, Ca
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    Dec 11, 2006
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    In addition to checking to make sure the cooling system is functioning, I suggest making sure your dwell and timing are all good, as my Jeep would run hot when the timing got off. Maybe make sure your vacume advance is functioning at the higher RPMs. Good Luck.
     
  3. Jul 29, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    Well I have been playing with the timing as I just installed a pertronix and had to pull the distributor. I do that tomorrow and see what happensthanks
     
  4. Jul 29, 2011
    Zoomer

    Zoomer eJeeper (walking)

    Minnesota
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    Radiator hoses still firm and not collapsing at higher RPM?
     
  5. Jul 29, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    Radiator hoses are new and not collapsing

    Thanks
     
  6. Jul 29, 2011
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    How new is the radiator? 3 core?
     
  7. Jul 29, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    The radiator is used and I dont know much about it.

    I believe its a two core but I will double check that

    I guess I could get it hot and feel around it for cold spots
     
  8. Jul 29, 2011
    Admiral Cray

    Admiral Cray I want to do this again.. Staff Member

    Bainbridge...
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    Pat,

    Are you running a fan shroud?
     
  9. Jul 29, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    No Im not...think that would cause overheating at higher rpm's?
     
  10. Jul 29, 2011
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Shroud is usually needed for air flow at lower speeds. If it's good at low speed and not high, I would lean toward overall cooling capasity. Good flow at low speed, just not enough surface (or the engine is heating more due to timing) at high speed.
     
  11. Jul 29, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    ok im going to start with timing and will try to report back
     
  12. Jul 29, 2011
    lamar

    lamar Member

    greenville sc
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    Jan 25, 2004
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    Had one that did what yours is doing, my radiator was partially clogged. Had it redone at a radiator shop and it cured the problem.
     
  13. Jul 29, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    Update time

    I started by playing with timing which didn't help but did solve my slight ping:)

    I then flushed the radiator with some stuff we have at work which didn't do anything but get my driveway wet

    I then pulled the thermostat housing off to check the t stat and it was installed properly

    I then went to remove the brand new electric water gauge

    What I found was the back of the gauge was very loose and had seperated from the rest of the gauge!!!!

    So after all this I think the gauge may have been the problem

    I am going to get the radiator flushed because there was some junk in there and I will install a new 180 degree thermostat.

    I also going to install a new autometer mechanical gauge

    I must admit I think I know why the gauge failed the way it did....when I installed my gm tilt column I had to open up the bottom of the dash and it's kinda floppy at the bottom

    I am thinking the vibration shook the poor gauge apart. So I will be stiffening up the dash before too long:)

    I will do my best to report back
     
  14. Jul 30, 2011
    EricM

    EricM Active Member

    Southern California
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  15. Jul 30, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    Ok update time

    I replaced the thermostat and installed a new mechanical gauge

    Same radiator and running straight water

    It runs 180 ish all day long but I took the same path as before and the gauge goes up to 200 after going 60plus for a couple minutes tops

    It never goes above 200 and then drops once I slow down

    Normal?
    Is 200 too high?
     
  16. Jul 30, 2011
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sounds about right to me...
     
  17. Jul 31, 2011
    skeely

    skeely New Member

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    Oct 26, 2009
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    no doubt the radiator. have a shop take off the top and bottom reservoirs and rod and boil out the core if it can be saved, if not they can put in a fresh 2 or 3 row. problem solved.
     
  18. Jul 31, 2011
    kaiser krawler

    kaiser krawler kaiser krawler

    naples florida
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    I don't know what kind of fan your running. i used to have a five blade steel fan with fixed blades on mine,when i would get out on the highway doing over 60, when the temp. was in the mid 90's mine would run hot and sometimes spit out the overflow. i put on an aluminum flex fan and the problem went away. something about the fan spinning fast enough to block airflow at speed.
     
  19. Jul 31, 2011
    napaguy

    napaguy Banned

    goldendale wa
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    Good point...I have a standard five blade fan on mine

    I will look into that thanks
     
  20. Jul 31, 2011
    theotherjmmy

    theotherjmmy Member

    Austin, Texas
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    What temp t-stat are you running and have you considered a cooler one if possible?
     
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