High Pressure Pump Assembly Overview

High Pressure Pump Assembly Overview






1 High pressure pump

• The Fuel Metering Valve (N290) is installed in the right high pressure pump (cylinder bank 1)

• Fuel Metering Valve 2 (N402) is installed in the left high pressure pump (cylinder bank 2)

• The Low Fuel Pressure Sensor (G410) is installed in the left high pressure pump (cylinder bank 2)

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

2 Bolt

• 9 Nm

3 Seal

• Replace

4 Low Fuel Pressure Sensor (G410)

• 10 Nm

• Installed only in the left high pressure pump (cylinder bank 2)

5 High-pressure line


• Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure. Refer to => [ Before Opening High Pressure Fuel Injection System ] Service and Repair.

• Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.

• Observe safety precautions when disconnecting the battery.

• Before loosening, disconnect Ground (GND) cable at battery with ignition switched off

• Connectors should not show any signs of damage

• Do not change bent shape

• 25 Nm

6 Fuel supply line


• Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure. Refer to => [ Before Opening High Pressure Fuel Injection System ] Service and Repair.

• Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.

• Observe safety precautions when disconnecting the battery.

• Before loosening, disconnect Ground (GND) cable at battery with ignition switched off

• Connectors should not show any signs of damage

• Do not change bent shape

• 25 Nm

7 O-ring

• Replace

8 Roller tappet