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Caterpillar C18 Engine Problem

Discussion in 'Engines' started by T.K., Oct 18, 2019.

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  1. T.K., Dec 2, 2019
    #21
    T.K.

    T.K. Senior Member

    Joined:
    Jan 31, 2007
    Messages:
    1,011
    Location:
    Cairo - Egypt
    The intercooler main O-rings had perished and were allowing salt water to drip into the air side of the tubestack. The intercoolers are now 6 years old.
  2. Lyner75, Dec 8, 2019
    #22
    Lyner75

    Lyner75 New Member

    Joined:
    Feb 21, 2017
    Messages:
    4
    Location:
    New Zealand
    I've installed yellow C18 in many of my work boat projects and white engines in yachts and can't imagine installing a ball valve would resolve an engine RPM issue. Another thing is waste gates are set to open at the preset pressure that relates to achieved engine speed/engine rated duty cycle. If an engine isn't making either the waste gate won't open so it's unlikely to be the core issue.
    Is your service guy able to access the fault codes and can you say what the engines rated duty cycle is.
  3. Capt J, Dec 8, 2019
    #23
    Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
    Messages:
    14,614
    Location:
    Fort Lauderdale
    Have the turbo chargers been checked visually? How much boost pressure and fuel pressure are you seeing when the engines are at temperature?
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