2009 ford F-350 6.4 diesel replaced the HPFP and removed the air in fuel, started as i was moving the truck it started leaking oil from back of the engine a lot of oil. can anybody help me? thank you in advance.

 

If you recheck your work you might find a gasket missing or damaged

 

A massive oil leak could mean a component disturbed during the teardown failed to seal Because replacing the HPFP requires removing the entire twin-turbocharger assembly and the engine valley cover, the oil is under direct pressure and will pour down the back of the engine block, mimicking a failed rear main seal.