High Pressure Pump With Fuel Pressure Regulator Valve Assembly Overview

High Pressure Pump with Fuel Pressure Regulator Valve Assembly Overview

CAUTION!
Fuel system is under pressure! Before opening high pressure components of the fuel injection system, the fuel pressure must be relieved to residual pressure, procedures. Refer to --> [ High Side Fuel Pressure Releasing ] High Side Fuel Pressure Releasing.





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 electric fuel pump, located in the fuel tank, supplies fuel to the mechanical high pressure pump at a pressure of approximately 7 bar.

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

• The fuel system must be pressureless to install the high pressure pump, releasing fuel pressure. Refer to --> [ High Side Fuel Pressure Releasing ] High Side Fuel Pressure Releasing.

• Install the fuel line to the fuel rail free from tension.

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

4 Fuel Pressure Regulator Valve (N276)

5 Bore in Cylinder Head

• For the high pressure pump.

6 Fuel injector

• Cylinder 1 fuel injector, (N30).

• Cylinder 2 fuel injector, (N31).

• Cylinder 3 fuel injector, (N32).

• Cylinder 4 fuel injector, (N33).

• With combustion chamber seal (Teflon seal), always replace. Refer to --> [ Fuel Injector Combustion Chamber Teflon Seal ] Fuel Injector Combustion Chamber Teflon Seal.

• Replace O-rings.

• Note correct installed position.

• Fuel injector individual parts. Refer to --> [ Fuel Injector Individual Parts ] Fuel Rail Assembly Overview.

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

• Cleaning, refer to --> [ Fuel Injectors, Cleaning ] Procedures.

7 Camshaft Position (CMP) Sensor (G40)

• Bolted to the front cylinder head cover. Refer to --> [ Camshaft Position (CMP) Sensor ] Service and Repair.

8 Camshaft Adjustment Valve 1 (N205)

• Removing and installing, refer to --> [ Camshaft Adjustment Valve 1 ] Service and Repair.

9 Bolt, 10 Nm

• For the high pressure pump.

• Always replace.

10 Connecting Piece

• For the fuel supply line.

• From the fuel tank.

11 Connecting Piece, 22 Nm

• For the high pressure fuel line to the fuel rail.

- Check the connection tightening specification before installing the fuel high pressure line.

• Always replace.