Engine Mounted Fuel Filter; Fuel Pressure Regulator; Fuel Inlet Check Valves - Ford 6.0L POWER STROKE Service Procedures And General Diagnostics

F U E L S U P P LY S Y S T E M

Engine Mounted Fuel Filter

• A secondary fuel filter is mounted to the oil
filter housing.
• The secondary filter is a 4 micron cartridge
style filter.
• It also incorporates a fuel pressure regulator
and an air bleed (to allow air to escape after
a filter change). Fuel from the regulator is
returned to the HFCM.

Fuel Pressure Regulator

• The fuel pressure regulator is mounted to
the engine mounted fuel filter.
• It regulates fuel pressure by routing
unfiltered fuel from the filter housing to the
HFCM via a spring loaded poppet style
valve.
• The cracking pressure(pressure at which the
valve begins to open) of the valve is 60psi
+\- 5psi. Actual fuel pressure may be above
or below this specification.

Fuel Inlet Check Valves

• Each cylinder head has a fuel inlet check
valve at the front of the head.
• The check valve is incorporated into the bolt
for the banjo fitting that attaches the fuel line
to the head.
• The check valves are used to maintain
constant fuel pressure in the fuel rail.
• The fuel lines are sealed to the head by two
copper gaskets.
• Note: It is recommended that the copper
gaskets be replaced if the bolt has been
removed.
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SECONDARY FUEL FILTER SECONDARY FUEL FILTER
FUEL PRESSURE TEST PORT
FUEL PRESSURE TEST PORT
FUEL RETURN LINE FUEL RETURN LINE
COPPER GASKETS COPPER GASKETS
FUEL RETURN LINE FUEL RETURN LINE
FUEL REGULATOR FUEL REGULATOR
FUEL REGULATOR FUEL REGULATOR
INLET CHECK VALVE
INLET CHECK VALVE
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