Fuel Pressure Regulator: Service and Repair

Fuel Rail Assembly Model R620 Exploded View:

REMOVE OR DISCONNECT:

1. Negative battery terminal.
2. Relieve fuel system pressure.
3. Intake manifold plenum.
4. Fuel rail assembly.

DISASSEMBLE:

1. Pressure regulator bracket attaching screws and pressure regulator mounting bracket.
2. Left and right hand fuel rails from pressure regulator base.
3. Base to rail connectors from regulator base, or rails.
4. Connector O-rings, from base to rail connectors and discard.
5. Fuel return O-rings from fuel rails and discard.

ASSEMBLE:

1. Lubricate new fuel return O-rings with lean engine oil, and install on fuel rails. (Fuel return O-ring diameter is larger than connector O-ring).
2. Lubricate new connector O-rings with engine oil, and install on base to rail connectors.
3. Base to rail connectors into regulator base.
4. Left and right hand fuel rails to regulator base.
5. Pressure regulator mounting bracket with pressure regulator bracket attaching screws. Tighten Pressure regulator bracket screws to 3.2 Nm (28 in lb). Fuel inlet fitting to 48 Nm (35 ft lb). Fuel outlet fitting to 40 Nm (30 ft lb).

INSTALL OR CONNECT:

1. Fuel rail assembly.
2. Intake manifold plenum.