See series 60 fuel return check valve As you move more fuel thru the head it will transfer more heat from the head back into the fuel tanks which will obviously increase the tank and then the inlet fuel temperature. The PRO-CHEK fuel system check valve is an optional item that when properly installed removes air from the fuel supply line between the secondary filter and the cylinder head. I just did a complete inframe with new detroit rebuilt injectors rebuilt head and a new fuel pump. Check also: fuel and series 60 fuel return check valve Ad Over 6 million configurations.
That valve returns fuel to the tanks. With a check valve from HHP youll get equal or better quality compared to the OEM at a much lower price.

Detroit Diesel Series 60 Fuel Check Valve Ddp645050 M D No priming is required even after filter change since any air that may get into the lines is automatically removed when it reaches the PRO-CHEK valve Install the PRO-CHEK valve as follows Mount the PRO-CHEK valve on the side or rear of the Series 60.
Theres a fuel check valve on the back side of the head that could help loose prime.

2008 certified facility ensuring quality and consistency. If you screw around with it and it cant return fuel then you run the risk of extremely high fuel. To top it off each check valve is manufactured and assembled in an ISO 9001. It also stops fuel from draining out of the fuel rail after you shut the engine off. If you have a davco fuel filter theres a check valve there too. Ad Over 6 million configurations.