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N14 overheating

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by wiley coyote, Jun 10, 2018.

  1. Jun 10, 2018 #1
    wiley coyote

    wiley coyote Bobtail Member

    1
    0
    Jun 10, 2018
    0
    n14 keeps overheating even on the slightest pull. worked fine 3 weeks ago after replacing thermostats and cleaning debris out of between fins on condenser and radiator. fan doesn't come on till about 205 degrees and AC will run hot air as soon as fan shuts off when idling. Any ideas?
     
    wiley coyote, Jun 10, 2018
    wiley coyote, Jun 10, 2018
    #1
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  3. Jun 10, 2018 #2
    Oldironfan

    Oldironfan Road Train Member

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    Overheating at what temp?
    You may have an air pocket.
     
    Oldironfan, Jun 10, 2018
    Oldironfan, Jun 10, 2018
    #2
  4. Jun 11, 2018 #3
    blairandgretchen

    blairandgretchen Road Train Member

    12,046
    60,621
    Dec 9, 2011
    South west Missouri
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    What temp thermostat are you running?
     
    blairandgretchen, Jun 11, 2018
    blairandgretchen, Jun 11, 2018
    #3
  5. Jun 11, 2018 #4
    wore out

    wore out Numbered Classic

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    CHASIN THE DEVIL'S HERD
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    Check the temp difference across the radiator. (Top to bottom) they should be running the same temp or close. A big difference in temp means poor circulation.
     
    wore out, Jun 11, 2018
    wore out, Jun 11, 2018
    #4
    jamespmack Thanks this.
  7. Jul 16, 2018 #5
    BigJoeTX

    BigJoeTX Bobtail Member

    27
    16
    Feb 13, 2018
    Katy TX
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    When was the last time you flushed your radiator? Could be clogged up.
     
    BigJoeTX, Jul 16, 2018
    BigJoeTX, Jul 16, 2018
    #5
  8. Jul 16, 2018 #6
    HopeOverMope

    HopeOverMope Road Train Member

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    Feb 25, 2016
    I-20 LOUISIANA
    0
    Is your water pump belt tight?
     
    HopeOverMope, Jul 16, 2018
    HopeOverMope, Jul 16, 2018
    #6
  9. Jul 16, 2018 #7
    xsetra

    xsetra Road Train Member

    4,924
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    Aug 21, 2011
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    Fan comes on at the correct temperature.
    A/C temperature, might be low freon.
     
    xsetra, Jul 16, 2018
    xsetra, Jul 16, 2018
    #7
  10. Jul 16, 2018 #8
    DUNE-T

    DUNE-T Road Train Member

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    May 10, 2015
    Detroit, MI
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    2nd this.
     
    DUNE-T, Jul 16, 2018
    DUNE-T, Jul 16, 2018
    #8
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