Top I believe is a delivery valve holder. Shouldn't need to remove unless you are rebuilding the delivery valves

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

The whole thing is covered in crud, and the delivery valve holders have joined the party. I'd like to clean them before I sell the monster...

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

If you are selling it, then clean the surface crud off, don't get cleaner in the delivery valve. You can pull them apart.. There are some great write ups on it here

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed