The strange thing is that the "knock" goes away instantly as I switch to WVO from diesel. The "knock" comes back gradually when switching back to diesel. It only started knocking a week ago. Never did it before. It sounds as if its only coming from one of the cylinders. If it were a timing issue I would guess it would be more rapid in nature. I don't know what nailing sounds like but it is louder than any knock I've had before.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012