I am just completing the install of my rebuilt injector pump
and need some help. When I pulled it out for rebuild
I found some small black rubber cylindrical things about 1/4 inch high and 1/4 inch OD I shall call gaskets. When I was at the rebuild
shop the mechanic
told me they are fitted to the fuel filter
inlet and return lines positioned on the end inside the injection pump. Since I only want to do this once I want to try to figure out their purpose. Also, I do not see them listed on the exploded view of the fuel
line diagram items 11 and 18. Are they really necessary?