Overview - Timing Mechanism Drive Chain

Fig 1: Identifying Timing Mechanism Drive Chain, Assembly Overview

Courtesy of AUDI OF AMERICA, LLC

1. Guide Rail
2. Bolt
   • 10 Nm + 90° additional turn
   • Replace
3. Bolt
   • Tightening specification

     Refer to OVERVIEW - CAMSHAFT TIMING CHAINS -item  13- Bolt (See Figure).

4. Drive Chain Sprocket Thrust Washer
5. Drive Sprocket for Left Timing Chain
6. Bolt
   • 10 Nm + 90° additional turn
   • Replace
7. Power Take-Off Drive Chain
   • Before removing, mark the direction of rotation with paint
   • Removing and installing. Refer to TIMING MECHANISM DRIVE CHAIN, REMOVING AND INSTALLING .
8. Guide Rail
9. Bolt
   • 10 Nm + 90° additional turn
   • Replace
10. Bolt
    • Tightening specification

      Refer to OVERVIEW - CAMSHAFT TIMING CHAINS -item  10- Bolt (See Figure).

11. Mounting Bracket for Drive Sprocket
    • For the right camshaft timing chain
    • Asymmetrical version
    • Installed position. Refer to Fig 2
12. Thrust Washer
    • Asymmetrical version
    • Installed position. Refer to Fig 2
13. Drive Sprocket for Right Timing Chain
    • Installed position. Refer to Fig 2
14. Mounting Pin for the Drive Chain Sprocket
    • Asymmetrical version
    • Installed position. Refer to Fig 2
15. Bolt
    • Tightening specification

      Refer to OVERVIEW - CAMSHAFT TIMING CHAINS -item  5- Bolt (SeeFigure).

16. O-Ring
    • Replace
17. Chain Tensioner
18. Bolt
    • 9 Nm
19. Crankshaft
20. Bolt
    • 10 Nm + 90° additional turn
    • Replace

Fig 2: Locating Camshaft Timing Chain Drive Sprocket Mounting Pins

Courtesy of AUDI OF AMERICA, LLC

• The alignment bushings in the right camshaft timing chain drive sprocket mounting pins -3- must engage in the holes in the thrust washer -1- and cylinder block.

2 - Right Camshaft Timing Chain Drive Sprocket

4 - Bolt