Yes VW Diesel injection pumps can be rebuilt. The pump needs to be bench tested afterwards using Bosch specs
ITS ON TOP OF THE PUMP.
transfers fuel to injector pump from tank
either the lift pump or the injector pump.the injector pump is very expensive to replace.it costs anywhere from 1800 to 2500 dollars just for the pump.I found someone to rebuild mine for 700 dollars.
in appropriate injector's, clocked injector nozzle's, injector pump diaphram ,(due to dirt fuel)
Lift pump failing and then taking out the injector pump
The fuel pump is part of the injector pump, althoug many diesel vehicles have a separate lift pump in the fuel tank as well.
It is integral with the injector pump on the LH side of the motor
will need recoding
If the question is how is it delivered ,then this how by transfer pump to the high pressure injector pump then through the nozzles.
you need a dial gauge which screws into the back of the pump its pretty simple after that.
An empty fuel tank A defective fuel pump A plugged fuel filter Damaged fuel lines A week injector pump
it is in the water pump on a diesel under the injecter pump there is to nuts behind th injector pump vert littel room to get them out