High Pressure Pump Assembly Overview

High Pressure Pump Assembly Overview

CAUTION!
Fuel system is under high pressure! Before opening the system, perform the procedure for releasing fuel pressure. Refer to => [ Before Opening High Pressure Fuel Injection System ] Service and Repair.





1 - Channel separating plate

• Removable

• Check for damages and correct positioning

2 - Sleeve

• Remains inserted in cylinder head after removing the high-pressure pump, removable

• When installing the high pressure pump, the sleeve must be at the lowest point (rotate the camshaft as needed)

• Removing and installing, refer to => [ High Pressure Pump ] High Pressure Pump

3 - O-ring

• Replace

4 - Mechanical single-piston high-pressure pump

• An electrical fuel pump, located in the fuel tank, supplies fuel to the mechanical high-pressure pump at a pressure of approximately 6 bar.

• When installing the high-pressure pump, make sure that no dirt enters the fuel system.

• The fuel system must be pressureless, releasing fuel pressure, refer to => [ Before Opening High Pressure Fuel Injection System ] Service and Repair

• Do not install fuel lines with tension

• When installing high pressure pump, the sleeve must be at the lowest point (rotate camshaft as needed)

• Removing and installing, refer to => [ High Pressure Pump ] High Pressure Pump

5 - Fuel Pressure Regulator Valve (N276)

6 - Low Fuel Pressure Sensor ( G410)

• 15 Nm

7 - Bolts for high-pressure pump

• Torx bolts (Qty. 3)

• 9 Nm

8 - Connection for fuel return line to fuel tank

• Replace bolt

• Tighten connection to 40 Nm (before each installation of the fuel line, check the torque of the connection)

• Do not install fuel line with tension (be aware of cleanliness) Torque specification: 25 Nm

9 - Fuel supply line to fuel rail

• Tighten connection to 30 Nm (before each installation of the fuel line, check the torque of the connection)

• Do not install fuel line with tension (be aware of cleanliness) Torque specification: 30 Nm

10 - Hole in cylinder head for high-pressure pump

11 - Fuel injector

• Replace O-rings

• Note correct installation position

• Removing and installing, refer to => [ Fuel Injectors ] Fuel Injectors