Hello from Germany. In a nod to the German insistence for green air (and better fuel economy) I'm wanting to refresh my injectors at the 320,000km or so point. I've reviewed the previous IH8Mud posts on locating injector serial numbers, and the correlation to diesel fuel pump serial number and the engine serial number. I've got a 1991 80 series, and I have photos of the data plates in the engine bay. My question: below model info (HDJ80L-GNMNXW) there is a string of numbers: (3H4 FD10 K304 H151F). Do these numbers indicate anything about engine serial number, and therefore injector serial number? Danke Schone from Stuttgart!