Intake Manifold, Lower Section, With Fuel Rail Overview

Fig 1: Identifying Intake Manifold, Lower Section, With Fuel Rail

Courtesy of AUDI OF AMERICA, LLC

1. Intake Manifold Lower Section
   • Left and right, removing and installing, refer to LOWER INTAKE MANIFOLD WITH FUEL RAIL 
2. Sleeve
3. Fuel Pressure Sensor -G247-
   • 20 Nm
4. Bracket
5. Bolt
   • 9 Nm
6. High-Pressure Line
   WARNING:

   There is a risk of injury because the fuel is under very high pressure.

   • Before opening high pressure area of the fuel injection system, fuel pressure must be relieved to residual pressure.
   • Reduce the fuel pressure in the high pressure area, refer to BEFORE OPENING HIGH PRESSURE FUEL INJECTION SYSTEM .
   • Do not change bend shape
   • Never bend the bracket from the fuel line.
   • If the bracket is bent, or if the fuel line is being replaced, then the bracket must be replaced.
   • Tightening, see Fig 2
7. Bolt
   • 9 Nm
8. Threaded Connection
   • 40 Nm
9. Stud Bolt
10. Nut
    • 9 Nm
11. Fuel Rail Retaining Bracket
12. Bolt
    • 2.5 Nm
13. Bolt
    • 9 Nm
14. Sleeve
15. Fuel Rail
16. Seals
    • Replace
17. Support Ring
    • Make sure it is seated properly
    • The fuel rail wields force via the support ring to hold the fuel injector tightly in the cylinder head.
18. O-ring
    • Replace
    • Coat with clean engine oil
19. Spacer Ring
    • Replace if damaged
20. Combustion Chamber Seal
    • Replacing, refer to FUEL INJECTORS .
21. Radial Adjustment
    • Replace if damaged
    • Clip with support ring -17-
22. Fuel Injector

    Removing and installing, refer to FUEL INJECTORS 

Fig 2: Fastening High-Pressure Line At Fuel Rail Using Torque Wrench VAG 1331 With Open End Wrench Socket VAG 1331/2

Courtesy of AUDI OF AMERICA, LLC

-- First tighten the high pressure line union nut by hand.

-- Make sure the high pressure line does not have tension.

-- Use the torque wrench 5-50 Nm VAG 1331 with the 17 mm ring spanner insert VAG 1331/2 to tighten the high pressure line on the fuel rail.

• Tightening specification: union nut on the high pressure lines, 27 Nm