Fuel Rail Overview

Fuel Rail Overview






1 - Fuel Injector

• With combustion chamber seal (Teflon 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 => [ Intake Manifold with Fuel Rail ] Intake Manifold With 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

• Do not install fuel lines with 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

• Tighten by hand in a diagonal sequence and then tighten to 5 Nm

• Final specification for M8 bolts = 20 Nm

• Do not tilt the high pressure pump

8 - Fuel Supply Line Connectors

• 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 with Fuel Rail ] Intake Manifold With Fuel Rail

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

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

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

• After replacing the throttle valve control module (J338) , it must be adapted to the Engine Control Module (ECM) (J623). 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 (G336) to the engine control module (J623) after removing, installing or replacing the intake manifold runner position sensor (G336) 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.

• Component location, refer to =>

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