High Pressure Pump with Fuel Pressure Regulator Valve Overview

High Pressure Pump with Fuel Pressure Regulator Valve Overview


Fuel system is under pressure! Before opening high pressure components of the fuel injection system, pressure must be reduced to residual pressure.

• Releasing the pressure in the high side. Refer to => [ High Side Fuel Pressure, Releasing ] Service and Repair.






1 - Roller Tappet

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

2 - O-ring

• Always replace.

3 - High Pressure Pump

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

• Make sure dirt does not enter the fuel system when installing the high pressure pump.

• The fuel system must be pressureless, releasing fuel pressure, refer to => [ High Side Fuel Pressure, Releasing ] Service and Repair.

• Do not install fuel lines with tension.

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

4 - Fuel Pressure Regulator Valve (N276)

5 - Hole in Cylinder Head for the High Pressure Pump

6 - Fuel Injector

• Replace the O-rings

• Note the correct installed position.

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

7 - Camshaft Position Sensor (G40)

8 - Camshaft Adjustment Valve 1 (N205)

9 - Bolts

• M6 thread = 8 Nm + 90° (1/4) additional turn.

• M8 thread = 20 Nm.

• Always replace.

10 - Connection, for the Fuel Line from the Fuel Tank

11 - Connection, for the Fuel Line to the Fuel Rail

• 22 Nm

• Always replace.