Fuel Rail Overview

Fuel Rail Overview






1 - Fuel Injector

• With combustion chamber seal (Teflon(R) seal), always replace

• Replace O-rings

• Note correct installation position

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

2 - Support Ring

3 - Fuel Rail

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

4 - High Pressure Pump

• With fuel pressure regulator valve (N276)

• There is an electric fuel pump located in the tank that supplies the fuel to the mechanical high pressure pump.

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

• The fuel system must be without pressure to install the high-pressure pump, releasing fuel pressure, refer to => [ Releasing Pressure in High Pressure Area ] Description and Operation

• Install the fuel lines free of tension

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

5 - Roller Tappet

6 - Fuel Pressure Regulator Valve (N276)

7 - High Pressure Pump Bolts

• First tighten the bolts diagonally hand-tight, then to 5 Nm and then to 20 Nm.

8 - Connections for the Fuel Supply Line on the Fuel Rail

• 40 Nm

• Replace

9 - Fuel Supply Line Union Nut

• 20 Nm

10 - Channel Separating Plates (intake manifold flaps)

11 - Gasket

• Replace

12 - Intake Manifold

• Removing and installing, refer to => [ Intake Manifold ] Intake Manifold

13 - Vacuum Diaphragm for the Charge-Motion Valves

14 - Throttle Valve Control Module (J338) , Electronic Power Control (EPC) Throttle Drive (G186)

• 7 Nm

• EPC throttle drive angle sensor 1 (G187) and EPC throttle drive angle sensor 2 (G188)

• It is necessary to adapt the throttle valve control module to the Engine Control Module (ECM) (J623) whenever it is removed and installed or replaced. Use a vehicle diagnosis tester.

15 - Intake Manifold Bolts

• 9 Nm

16 - Intake Manifold Runner Position Sensor (G336)

• Adapt the intake manifold runner position sensor to the ECM after removing, installing or replacing the intake manifold runner position sensor or the intake manifold. Use a vehicle diagnostic tester in "Guided Functions".

17 - Fuel Pressure Sensor (G247)

• 27 Nm

• Coat the threads with clean engine oil.

• Always replace the connections and tighten them to 40 Nm.

• Removing and installing, refer to => [ Fuel Pressure Sensor (G247) ] Service and Repair