I’ve put about 150 miles on it since I did the DVs.

My take is that the injectors are quieter, I can’t tell that there is as much knock.

I still get a rhythmic metallic tapping at a slower frequency. Maybe that’s the lift pump or something? I notice it’s most pronounced at hot idle and when driving in high gear at low rpm, 1100-1250 call it, where I hear it most pronounced.

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)