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Coolant for Cummins 450C

Discussion in 'Engines' started by brianwill, Aug 9, 2004.

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  1. brianwill

    brianwill New Member

    Joined:
    Jan 11, 2004
    Messages:
    75
    Location:
    Texas
    The service manual for my neighbor's Cummins 450C engines specifies a special coolant that meets a GM spec. Does anyone know if we can simply use a 50/50 mix of Prestone or similar off-the-shelf product? The engines are no longer under warranty (I encouraged him to use the Cummins fluids in the past to cover the warranty period). The oil, coolant, etc. are very expensive, and he'd like to see if he can save a few bucks on the routine service.
  2. JHA

    JHA Senior Member

    Joined:
    Apr 5, 2004
    Messages:
    75
    Location:
    Ft. Lauderdale
    call RPM and see what they say. I would imagine you could get away with a decent coolant additive. I personally don't use the factory coolant, and haven't had any problems...
  3. brianwill

    brianwill New Member

    Joined:
    Jan 11, 2004
    Messages:
    75
    Location:
    Texas
    JHA,

    I don't think I got the full text of your message, could you repost it please?