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Overheating

Discussion in 'The Garage' started by orangeGMC, Jul 7, 2005.

  1. orangeGMC

    orangeGMC 1/2 ton status

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    Does any body have any recommendations in order to prevent overheating? When wheeling my climbs really fast, then I shut the truck off and let it cool down. I have no problems on the street or in traffic. Any ideas would be great.
     
  2. 4trolls

    4trolls 1/2 ton status

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    I took the shroud off and put a 89 Taurus fan in between the engine fan and the rad. and it works perfect, use a relay for the fan or it will drain your batt. those taurus fans draw alot of amps.
     
  3. trailblazr81

    trailblazr81 1/2 ton status

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    An auxillary fan hooked up to a temp switch so it will come on or stay on when motor is off till it lowers to a set temp. A buddy of mine did that with his fyord.
     
  4. sweetk30

    sweetk30 professional hooker Premium Member

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  5. gmcjimmy90

    gmcjimmy90 Registered Member

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    what are you running stock fan, flex fan, or electric any performance upgrades what engine size
     
  6. MTMike

    MTMike 1/2 ton status

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    A fan shroud can make all the difference in the world....
     
  7. orangeGMC

    orangeGMC 1/2 ton status

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    Its a 350 with a flex-a-lite dual puller fan. Hooked up to a derale temp switch. It seems like the fan runs all the time.
     
  8. gmcjimmy90

    gmcjimmy90 Registered Member

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    switch it back to a stock fan with a new clutch and factory shroud and you should be fine
     
  9. MTMike

    MTMike 1/2 ton status

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    What he said... :xmas:
     
  10. Mad-Dog

    Mad-Dog 1/2 ton status

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    check the pump for adequate water flow..the impeller could be chewed up, a high flow pump may be in order.

    remove the valve from the thermostat...this creates a simple restrictor plate which allows water to flow like the thermostat is stuck open

    make sure the cooling system is purged completely

    replace the bottom hose as it may be collapsing

    write your congressman for suggestions :haha:
     
  11. camok5

    camok5 1/2 ton status Premium Member

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    It might be the fans because I have the same setup and mine heats up when I go up long hills or wheel it hard.
     
  12. dyeager535

    dyeager535 1 ton status Premium Member

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    What are the fans rated at CFM-wise? Doesn't matter if electric or clutched, if the fan is too small it will overheat.
     
  13. camok5

    camok5 1/2 ton status Premium Member

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    This is the fan I am running but I changed it to run full rpm when above 180 degrees

    Part #
    292,295/298 puller

    Mounting Surface Required
    17½" x 27½" x 4"

    Fan Diameter
    Dual 13½"

    Fan RPM @13.5VDC
    Variable 1260-2100

    Number of Blades/Fan Blade Angle
    8/26°

    Airflow-Cu. Ft./Min. at 0º Static Pressure
    2760-4600

    Amp Draw
    16-28

    Mounting System
    Universal Bracket
    292 Custom Bracket (Chevy, GMC)
    298 bracket not included

    Adj. Thermostat 160-240 degrees
    Yes
    298 does not include thermostat

    Air Conditioning Relay
    Yes
    298 does not include relay

    Variable Speed Control 60-100%
    Yes
    298 does not include controls
     
  14. down4thakrown

    down4thakrown 1/2 ton status Premium Member GMOTM Winner

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    what size radiator do you got?
     
  15. Thunder

    Thunder 3/4 ton status

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    How is your radiator? Is it in good shape? Are the tubes clean and not plugged or corroded.
    If your radiator is in good shape then.
    I would get rid of the electric flex a lite
    Flex a lite fans dont pull enough CFMs. You would be better off with stock fan/Clutch and shroud.. Or going with a Tarus/ V8 T bird, lincoln Mk VIII fan, as above post said. But you will need a 130 amp alternator to power it or it will suck your battery dry..
     
  16. camiswelding

    camiswelding 1/2 ton status

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  17. dyeager535

    dyeager535 1 ton status Premium Member

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    If that setup really pulls 4600CFM, you shouldn't be having fan related cooling issues IMO.

    You say long hills, is this towing, unloaded, freeway, logging roads, ?
     
  18. dendeanda

    dendeanda Registered Member

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    To me it sounds like a thermostat problem. Take it out then go wheeling and see what happens.
     
  19. camok5

    camok5 1/2 ton status Premium Member

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    Everything is new, radiator is a 4 row, new thermostat and its when I am going up steep highways. How much better is the Tarus fan then my setup?
     
  20. 4trolls

    4trolls 1/2 ton status

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    with the taurus fan it has not gone over 200 ever , the fan cost me $25 from Langlys auto wrecking.
     

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