Macrobb
Full Access Member
It's not that hard to completely disassemble one and replace seals - I think it took me a couple of hours to get it apart, cleaned, re-sealed and reassembled.Dang, Macrobb! You've rebuilt your own pumps? You're WAY more adventurous than I am. I've had the top off and I've adjusted the fuel screw on the side and that's good enough for me!
The only hard part is that you can't do much more than change a few adjustments without new parts; things like wear on the timing piston or bore, or the 'hot start' issue can't really be fixed without new parts.
Now, if I *had* a new rotor, yeah, it wouldn't be hard to swap it in. Not having a flowbench means that I would kind of just guess at a few settings and run it, then adjust if needed.
I do a /lot/ of adjusting on the timing and fuel-screw(NA only; turbo motors should have it fully cranked up), though - those are easy and make major differences to how a truck runs.