Cummins ISX Still Overheating

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Working Class Patriot, Jul 26, 2014.

  1. Working Class Patriot

    Working Class Patriot Road Train Member

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    Why?........They have their issues as well...
     
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  3. wore out

    wore out Numbered Classic

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    CHASIN THE DEVIL'S HERD
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    I wasn't aware they didn't have their own problems.
     
    SAR and KenworthGuyNH Thank this.
  4. Working Class Patriot

    Working Class Patriot Road Train Member

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    Going on the Dyno tomorrow...

    Could be as simple as bad sensors...
     
  5. Working Class Patriot

    Working Class Patriot Road Train Member

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    Dyno pointed to a bad Coolant Temp sensor and the tensioner pulley is bad too...
    Replacing those and back on the dyno...
     
  6. Jjkcentral

    Jjkcentral Bobtail Member

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    I got a 2014 Pete 388 with an ISX I got the same issue. I’ve replaced oil temp sensor, oil cooler, oil cooler thermostat, radiator also the water pump. It’s only when loaded and pulling grades or bucking a stiff wind. Mines never hit 300 but 250 to 260 fore sure. The fan doesn’t kick in because the coolant temp is in range. I’ve heat gunned the pan and it is as hot as the gauge reads. No shop can figure it out.....
     
  7. pushbroom

    pushbroom Road Train Member

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  8. Heavyd

    Heavyd Road Train Member

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  9. Roush

    Roush Bobtail Member

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    Joplin
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    What solved the problem?
     
  10. Motorcity trucker

    Motorcity trucker Bobtail Member

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    I got a t2000 2009 with a isx I replaced the water pump, the thermostat, and flushed the coolant system still over heating. Any body got any suggestions? Also had the head checked it's good and not leaking anywhere. Could it be a fuse I'm missing? Fan kicks on around 210 215
     
    Last edited: May 18, 2019
  11. Goodysnap

    Goodysnap Road Train Member

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    At fan on temp of 215f_ How long does it take to for the coolant temp to pull back to 180f? First step........check the cooling package/radiator for air flow restrictions or blockages.
     
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