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  1. S

    Humvee Engine Knocking (yes it's actual knocking, probably)

    thank you. I have no experience. How difficult is to “crack the injectors lines”?
  2. S

    Humvee Engine Knocking (yes it's actual knocking, probably)

    The sound is very similar but the smoke in my case is gray/white.
  3. S

    Humvee Engine Knocking (yes it's actual knocking, probably)

    the smoke is grayish. Not black at all. The video below shows. I have not changed the oil since the issue started. I will change it tomorrow. Last time I used Rotela T6 15w40. Today I’ve added sea foam engine treatment. It should help cleaning the injectors. Hmmwv smoke video
  4. S

    Humvee Engine Knocking (yes it's actual knocking, probably)

    hello. I’m replying to the original post because I’m having a similar problem. After running for months without any problems the engine started to make a knocking noise and spitting out a lot smoke. The video below shows the knocking. This engine was replaced 20 months ago and I only drove...
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