2013 ISX15 running hot

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mitmaks, Jul 27, 2021.

  1. mitmaks

    mitmaks Road Train Member

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    I've got '13 isx15 450hp that seems to run hot. I'm climbing hills and with a/c off and fan on it can barely keep temp under 210F
    I'm thinking maybe I have blockage in radiator somewhere. What can I do to help keep it cool?
     
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  3. MLC Adventures

    MLC Adventures Medium Load Member

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    First, blow the radiator out from the inside forward. It's likely got some external flow issues. Keeping RPM's up on hills will help keep temps down too.

    What RPM are you pulling these hills.
     
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  4. mitmaks

    mitmaks Road Train Member

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    Generally 1500rpm going 25-35mph pulling 40-47k
     
  5. MLC Adventures

    MLC Adventures Medium Load Member

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    You'd run cooler at 1750-1800. You must be on some huge hills ar 25-35 mph.

    Nonetheless, the lower that RPM is, the harder that engine has to work.
     
  6. mitmaks

    mitmaks Road Train Member

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    Water pump was replaced last year
     
  7. God prefers Diesels

    God prefers Diesels Road Train Member

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    My truck ran 192* empty. New radiator and thermostat, it runs at 180*. Climbs when I pull a hill. But even in cases like you, if I flip the fan on, it runs at 176* grossed, and pulling a hill for five minutes straight in 6th gear.

    Point being, your manual fan should be able to control your temps perfectly if everything else is right.
     
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