this is the noise that persists after replacing the nozzles and pop testing them to within 40 psi of each other. As the video description says, during a diesel purge all the knocking noise goes away.

any suggestions?

https://www.youtube.com/watch?v=HJsxVluVOhU&feature=youtu.be

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'92 300D 2.5
'99 E300TD

You need to set your video to public.

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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino

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sorry, should work now.

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'92 300D 2.5
'99 E300TD

I am an OM617 guy, so not the local expert on your motor, but it sounds normal to me. Nice, actually. New nozzles are always noisy for a while.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Was the problem ever resolved? i have a similar knocking noise on my om603 engine.

I have SAME exact engine..and mine sounds EXACTLY like that...diesels make all kinds of funny noise, it comes and goes, depending on many factors. I say again it sounds perfectly normal...just drive it, and try not to figure out every little noise...it will make you nuts...lol

Very good advice

Have you tried any fuel additives? I know this is a touchy subject, but I can usually tell a noise improvement from adding some 2-cycle oil or whatever. The problem is it seems like you need a fair amount of volume to notice anything, which gets costly.