A few questions about fuel and internal parts

[Khaj]

Looking at buying some new injectors and injector pump rebuild or replacement is there any modern replacements I could use for my ld28 trying to chase a fuel issue and think that my injectors might be failing it’s been having idling and no power issues internals sound good and don’t have any blow by

I was also thinking of replacing my cam for a performance cam and was trying to find a headgasket, rods, pistons, and possibly a stronger head since I know the valve seats crack on these when boost is applied I have a turbo and kit for the engine and wanting to basically refresh the engine

I saw that the 5.9 Cummins had a ve6 pump and looks similar to the LD pump and was wondering if I could make that work

[Khaj]

Any useful information would be greatly appreciated and if you have links or part numbers to direct me somewhere that’d be great bosh service centers aren’t a thing here yet in OK unfortunately

[nissan_nerd]

The oem part number for injector nozzles is 16620-V0702 and have DN0SD193NP1 stamped on them.

Before replacing/rebuilding anything I would check the injection pump timing first. Though doing that is ridiculously difficult as you have to remove the injector lines completely, screw in a specific hard to find dial gauge tool, loosen the pump, and physically move the pump back and forth until the dial reads OEM specs. According to the FSM this is supposed to be done periodically, but I'd say most LDs in service today haven't had that done since the 80s.

I'd also check the intake manifold for grunge build up especially if your EGR is still hooked up. My Maxima had 100k miles on it when I bought it, and the intake was plugged up pretty badly. Ran much better once cleaned out.

The injection pumps on the LD are nearly indestructible in my opinion. Although, they are prone to leaking fuel especially from the distributor and front shaft seal. Another thing too is the vein pump which builds internal pressure to activate the advancer tends to wear out prematurely, but it will still run/drive fine. Several shops have quoted me $1000-$1500 for a rebuild/reseal here in California.

Not sure if there are any off the shelf performance parts for the LD28. Though, a stock internal LD28 should be able to run low boost (5-6psi) reliably. They are very stout!