Fuel Rail With Injectors, Disassembling and Assembling

Fuel Rail With Injectors, Disassembling And Assembling







1. Retaining clip
- Make sure clip is positioned correctly at injector and fuel rail
2. O-ring
- Always replace
- Coat with clean engine oil.
3. Injector
4. O-ring
- Always replace
- Coat with clean engine oil.
5. Fuel return line
- Only in vehicles up to 06.03
6. Fuel supply line
- For vehicles up to 06.03, tighten union nut to 22 Nm
- Loosening and tightening union in vehicles as of 07.03, see Fig. 1.

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

7. 10 Nm
8. Fuel rail
9. 10 Nm
10. Retaining clip
- Make sure tight fit
11. O-rings
- Always replace
- Moisten with clean engine oil.
12. Fuel pressure regulator
- Integrated in fuel filter in vehicles as of 07.03
13. Vacuum hose







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. 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.