I ran into a snag with the Fuel Pump on the Nissan Urvan E23, it started leaking, and I’ve been able to smell fuel for a few weeks now, but it was not until the engine started to run badly that I stopped and had a thorough search for the problem. I guess being stuck on the side of the road gives you time to check things out.
So now I know what the problem is but after a search around the internet it appears that fuel pumps are not easily repaired because its difficult to find the right rebuild kit, mainly because it is difficult to identify a pump without any markings,
It would seem that most people simple put in a new after market rebuild kit, for example Darren from Classic Carbs suggests:
The aftermarket pump is FPM-050. Sparesbox have them at $208. My kits are around $105 if we can identify it. – https://classiccarbs.com.au
This is the Carb here, and you can see the little hole which is leaking fuel.
Top View of E23 Fuel Pump
I am going to keep looking for a Diaphragm Kit, and I’ll keep you posted about how things go, but I found these posts very helpful.
https://classiccarbs.com.au
https://www.classiczcars.com/forums/topic/50679-rebuilding-the-nikki-fuel-pump/