Knocking sound at higher revs from my 1969 200D (OM615) - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 11-03-2012, 07:33 PM Thread Starter
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Knocking sound at higher revs from my 1969 200D (OM615)

Greetings everyone!

I would like to consult the diesel gurus once again regarding this engine knocking sound I hear at higher revs when I release the accelerator to change gears. After releasing, revs go slightly up but doesn't seem to go down as fast as it should. I already adjusted the valves and the injection pump diaphragm was replaced recently. Could it be a fuel problem or is it something else? Thanks!
ijiwaru is offline  
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