There isn’t much difference really, the
head is more important on a
Diesel, the valves need a better seal at those high compressions, but your better off having a machine shop do any
head anyway unless you can grind valves / seats anyway. I like new
bronze guides
Pump and injectors it’s my opinion those go to a professional shop too.
If you have wet liners, then no boring or even honing, just check ring gap. If you
overhaul before its real bad then most likely the crank can just be polished and go back with standard bearings, most of the time the cam will be fine too as valve spring pressures are low as
RPM is low.
Don’t spray bomb
paint the
motor though, use a high quality ideally two part
paint, I like white
Marine motors myself.
Replace the
oil pump with new, I don’t even measure the wear, pump is just too important and usually not a great expense.
Timing the injection pump can be difficult or dead easy depending on the
motor, sometimes it’s possible to time 180 out so be sure it’s TDC
compression and not
exhaust.
Diesels are really, really easy, especially small inline ones, they are simple things really.