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Cummins 903 diesel turbo

Discussion in 'Engines' started by Latinoal, Apr 19, 2020.

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  1. Latinoal

    Latinoal New Member

    Joined:
    Oct 11, 2019
    Messages:
    2
    Location:
    MALTA
    Any ideas ?
    When checking the coolant on my starboard engine I found traces of oil in the filler tank any clues as to why please ?
  2. vacser

    vacser New Member

    Joined:
    Apr 12, 2020
    Messages:
    1
    Location:
    Stuart Florida
    Your oil cooler is bad. Antifreeze flows through the cooler to cool your engine oil. Your oil pressure is greater than your coolant pressure so it ends up in your day tank.