hacked89
Full Access Member
That’s correct and why in my return system I have the regulator bypass and IP return on a straight shot back to the tank.
We’ll I learn something new every day on this forum! I thought the excess fuel from the IP provided cooling to the injectors as it flowed past them, but if the experts say otherwise I 100% defer to them.
Never gave it much thought before why it was there on top, like a Brake Bleeder on a Slave Cylinder or Caliper, they are on top...air rises.And this is why it has a fitting for an outlet on top so the pump is always full of fuel preferably bubble free.
Thank You for posting this. I have been around and owned Diesels for a long time, and read a lot of books on Diesel Injection and how the various engines work etc....I had a Ford engineer on another board correct me when I said the fuel leaking in the return system from the injector was to cool and lubricate the injector. He got into this long explanation which I have forgotten mostly, but what I do remember is he said a brand new injector will have little to no flow into the return system, and as something inside the injector wears, the return flow will slowly increase with the age/miles on the injector.