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Fan Blade Question

Discussion in 'Early CJ5 and CJ6 Tech' started by Rozcoking23, Apr 17, 2024.

  1. Apr 22, 2024
    Stakebed

    Stakebed Member

    Lake Co....
    Joined:
    Aug 2, 2022
    Messages:
    697
    Yep, my bad. Heck, I even proofread. See what happens when you get gray? I'll edit.
     
    Rozcoking23 likes this.
  2. Apr 22, 2024
    jeep peep69

    jeep peep69 Member

    redding ca.
    Joined:
    Dec 8, 2007
    Messages:
    631
    Get a radiator comb and straighten all the fin on the radiator it's amazing how much air flow is diminished by just a few bent over one's.
     
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  3. May 9, 2024
    Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Stockton, CA
    Joined:
    Mar 29, 2008
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    924
    Update on this project. Still haven't received the 7 blade fan I ordered over a month ago. I did pull the radiator and straightened the fins. I also modified the fan shroud that I had sitting around and installed it. put back on the 5 blade fan I had. Also added water wetter to the mix. I did change out to the Robertshaw 160 thermostat. Tuned carburetor and set timing to 12*. Getting mixed results.
    It was 84* out today and I took JEEP out for 60 mile run down highway and back roads.

    this was going down freeway at 60-65 mph 175*:
    IMG_3485.jpg IMG_3486.jpg

    Slowed down for some country roads to about 40mph, 180*
    IMG_3487.jpg
    Dropped it into granny low and just let it idle down the levee road, this was after 5-7 minutes, 190*.
    IMG_3488.jpg ,
    After 10 minutes 205*.

    IMG_3489.jpg

    it did reach 210* after about 15 minutes. As soon as I hit 2nd gear and was running 7-8 mph and getting rpm’s up above 1500 it cooled back to 185-190*. I didn’t hook up the electric fan for this trip, but I need to do that to see where that puts the tempature.
     
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  4. May 12, 2024
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,241
    What condition is your water pump in? I had a truck that only ran hot when running under 15 mph. Heavy steel fan blade in a good shroud, with a good brass radiator. Months later, the water pump started leaking, so I pulled it off to change it out. It had a stamped steel impeller, and nearly all the vanes were rusted off/dissolved from rust. At higher rpm, it pushed enough water (no antifreeze) to cool things, but at low rpm, didn’t circulate very well.
    Maybe a long shot?
    -Donny
     
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  5. May 17, 2024
    Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Stockton, CA
    Joined:
    Mar 29, 2008
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    924
    The water pump is right at a year old, it’s a FlowKool unit. It’s running about 5-7* cooler then the original/stock water pump.
     
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  6. May 17, 2024
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

    Southern...
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    Nov 24, 2019
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    1,861
    Was just reading thru your thread. Do you have air conditioning with an AC condenser in front of your radiator? I can see the under dash unit.
     
  7. May 17, 2024
    Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Stockton, CA
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    Mar 29, 2008
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    No, I used after market heater, and used after market vents to direct the heat into the cab area instead of just blowing onto the floors.
     
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  8. May 30, 2024
    Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Stockton, CA
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    I finally got the 7- blade fan and it’s mounted. I will see if it makes any difference in my temps and report back.
    IMG_3688.jpg
     
  9. May 31, 2024
    Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Stockton, CA
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    Mar 29, 2008
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    924
    Let her idle in a 98* garage for 40-45 minutes and only got to 190*. Running down the road and it’s running at 175-180* IMG_3695.jpg
     

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  10. Jun 3, 2024
    Bob

    Bob Member

    Northern California
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    Sep 23, 2002
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    444
    Is that with a shroud, Rob?
     
  11. Jun 3, 2024
    Rozcoking23

    Rozcoking23 RUN & GET BIT! 2024 Sponsor

    Stockton, CA
    Joined:
    Mar 29, 2008
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    No shroud. I want to try it both ways. So far without the shroud it’s doing a good job keeping it kool.
     
  12. Jun 5, 2024
    Bob

    Bob Member

    Northern California
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    Sep 23, 2002
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    Good deal.
     
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