AAZ engine - diesel pump

Post by **Wilma** » 24 Sep 2008, 09:41

Hi, fellahs. Am fitting an internal heater to my camper. It (the heater) is a Mikuni Japanese thing, looks just like an Eperschpacer, works the same way. Problem at the moment is where to tap into the diesel supply. The heater has its own little pump to lift the fuel once connected. The AAZ engine has a flexible low pressure hose coming from the fuel filter and going to the high pressure injector pump. There does not appear to be a separate lift pump anywhere in the system. It seems that the big fuel injector pump has a lift suction pump built into it at one end. Is this right? It works OK, never have any starting problems.

Assuming that it is does anyone know if I can cut into the low pressure feed and T off that to the little pump on the heater? The heater will never be used when the engine is running. I am wondering what the effect of pumping diesel out of the fuel line to the heater will be when when in use. Will it draw fuel away from the lift pump so that we cannot start the engine?

Second question. Apart from all of the heater business how do you bleed the existing system? There is no little lever that you get on a lift pump so far as I can see.

Post by **camper** » 24 Sep 2008, 15:26

I have a vegi oil conversion there are fuel non return valves & Tees from http://www.biotuning.co.uk/ShopFittings.htm .You could fit a non return valve off a T from the fuel supply to the pump.This would protect against airlock .

Post by **Westy.Club.Joker** » 24 Sep 2008, 20:15

No lift pumps were fitted. The OE fitment Eber heaters tap into the diesel line near to the tank, just uses a T piece and then a short rubber hose to the Eber fuel pump with no drama.