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Cat 18 Acert white smoke when accelerating in neutral

Discussion in 'Technical Discussion' started by wally lopez, Dec 19, 2019.

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  1. wally lopez

    wally lopez New Member

    Joined:
    Dec 19, 2019
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    Location:
    Puerto rico
    Cat 18 Acert is making white smoke at 1400 rpm and above when in neutral. All injectors are new. When you cut any two injectors the white smoke start to dissapear. Any thoughs on this issue, thanks
  2. Capt Ralph

    Capt Ralph Senior Member

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    Location:
    Satsuma, FL
    I assume the same issue before the new injectors.
    Stuck or broke exhaust valve.
  3. Capt J

    Capt J Senior Member

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    How old are the aftercoolers, 1 could be starting to leak...….if over 6 years, change the aftercooler.
  4. Capt Ralph

    Capt Ralph Senior Member

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    Another idea there also.
    What is happening; Either low compression or a wet with water lung is spitting raw fuel into the exhaust manifold. Some of that unburned fuel is ignited in the exhaust manifold by hot expanding exhaust gasses from other lungs.
    Stick your face in that smoke and your eyes will burn if it's fuel heavy, not so bad if it's steam.

    Don't mess around with this. You could drop a valve completely (if it's a valve) or bend a rod / blow the engine if water (from the A C).

    If it's never been over heated
    -- dock queen; valves.
    -- old and good use; A C.
  5. T.K.

    T.K. Senior Member

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    Cairo - Egypt
    How old are the engines and what are the operating hours?
  6. mapism

    mapism Member

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    Sardinia
    Do you mean ONLY in neutral? What happens under load?
  7. Fiammetta42

    Fiammetta42 New Member

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    Sep 28, 2017
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    Location:
    Cote d Azur
    Heats up things expand and the water leak self seals .......for now .

    sounds like water = intercoolers are timed out service parts .

    Worth checking the closed coolant levels when cold to eliminate that side .