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 ] Releasing Pressure In High Pressure Area.

• 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, engine codes CAEB and CPMA, refer to => [ Intake Manifold ] Intake Manifold

13 - Channel Separating Plate Vacuum Diaphragm (intake manifold flaps)

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)

• Each time the throttle valve control module (J338) is removed and installed or replaced, it must be adapted to the Engine Control Module (ECM) (J623). Use the vehicle diagnostic tester in "Guided Functions".

15 - Intake Manifold Bolts

• 10 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 the vehicle diagnostic tester in "Guided Functions".

17 - Fuel Pressure Sensor (G247)

• 27 Nm

• Coat the threads with clean engine oil.