Overhaul

Fuel Rail With Injectors, Disassembling And Assembling







NOTE: To prevent damage to the catalytic converter, the fuel system must be bled after work is performed on fuel rail or on fuel lines. Vehicle must only be started after bleeding.

1 - Hex head bolt - 10 Nm
2 - Protective cap
3 - Bracket
- Ensure it is positioned correctly on injector and fuel rail
4 - Intake manifold
- With Throttle Valve Control Module -J338-
- With Intake Air Temperature (IAT) Sensor -G42-
5 - Insert for injector - 3 Nm
- Install with locking fluid D 000 600 A2
6 - O-ring
- Moisten with clean engine oil
7 - Fuel injectors
- Cylinder 1 -N30-
- Cylinder 2 -N31-
- Cylinder 3 -N32-
- Cylinder 4 -N33-
8 - O-ring
Moisten with clean engine oil
9 - Fuel supply line
- For vehicles up to 06.03, tighten union nut to 22 Nm
- Loosening and tightening union nut in vehicles as of 07.03

WARNING: Fuel system is under pressure. Before opening system, place rags around the connection point. Then release pressure by carefully loosening connection.

10 Fuel rail
11 - Connector
- For injectors
- 4 pieces







Fig. 1 Loosening and tightening union nut for fuel supply line in vehicles as of 07.03

WARNING: Fuel system is under pressure. Before opening system, place rags around the connection point. Then release pressure by carefully loosening connection.

Loosening
- Unscrew fuel hose from connection on fuel rail pipe. To do so, counterhold using an open-end wrench at each hex head -1- and -3- and unscrew union nut -2-.

Tightening
- Secure fuel hose to connection on fuel rail pipe. To do so, counterhold using an open end wrench at each hex head -1- and -3- and tighten union nut -2- to 22 Nm.