Cleaning flooded engine with diesel

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  • #986713
    Jeff CobbJeff Cobb

      I’ve heard that when an engine is flooded with water, one way to clean it is draining the engine oil, transmission oil, etc and then filling all those with diesel fuel, and letting it set. Then draining again. I DON’T mean starting and running the engine, just let it set a few days, then drain again. This isn’t about sludge, or even only cars, but ANY internal combustion engine that burns gasoline. Has anyone tried this? Did it seem to work? I don’t have a flooded engine at this time, but recently worked on one, and I have seen equipment rental place that flooded do this. Thanks!

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    • #986715
      Nightflyr *Richard Kirshy

        Taking this one step at a time.
        If you have an engine that has been flooded (submerged) in water.
        First thing would be dry out the electrical system (if in a vehicle)
        Pull all the plugs, drain/replace the engine oil and filter.
        Crank the engine over to ex-spell the water out of the cylinders.
        Spray WD-40 in each cylinder to displace any moisture still in the cylinders.
        Reinstall fresh plugs, start the engine, if it runs normally, let it reach operating temperature.
        Then do another oil and filter change.
        Diesel just sitting in the oil sump,will not absorb the water.
        JMHO, better to disperse the water into engine oil when running (milkshake)
        I would not suggest putting diesel fuel in a transmission ever.
        Better to cycling fresh transmission fluid.

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