working on my "new" 78 240d, removed the injector hard lines, to get to the glow plugs -- when i did, i noticed that where the fuel enters the injector, where the hard lines were attached, the size of the "orifice" is much smaller on 2 of the 4 injectors -- having worked on mercedes and vw diesels for years, i don't recall these smaller openings -- also wondering if this creates an imbalance in cylinder power?

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78 240d: Mona
81 240D: Lola
77 toyota chinook: Carlito
93 chevy k1500: Cowboy