The attached oil pump pressurizes the oil to the engine. You will need an external oil reservoir of appropriate volume. A filter (if it had one, some...
Would like to know where in the heck a oil filter would be mounted??? also is the pump looking item on the back of the block a pump, it has a jic 16...
Spend some time looking at every electrical connector on the engine that had been disconnected during the IP change, looking for a loose connector or...