Overview - Timing Mechanism Drive Chain

Fig 1: Identifying Timing Mechanism Drive Chain Overview

Courtesy of AUDI OF AMERICA, LLC

1. Guide Rail
2. Bolt
   • 10 Nm +90°
   • Replacing
3. Bolts
   • 5 Nm +60°
   • Replacing
4. Mounting Pin
   • For the drive chain sprocket
5. Drive Chain Sprocket
   • For left timing chain
6. Bolt
   • 10 Nm +90°
   • Replacing
7. Drive chain
   • For timing mechanism
   • Mark the running direction with paint for reinstallation
   • Removing and installing, refer to TIMING MECHANISM DRIVE CHAIN, REMOVING AND INSTALLING .
8. Bolt
   • 10 Nm +90°
   • Replacing
9. Guide Rail
10. Bolt
    • 8 Nm +45°
    • Replacing
11. Bearing Plate
    • For the right camshaft timing chain drive sprocket
    • Asymmetrical version
12. Drive Chain Sprocket
    • For right timing chain
    • Installed position, refer to Fig 2
13. Thrust Washer
    • Asymmetrical version
    • Installed position, refer to Fig 2
14. Mounting Pin
    • For the drive chain sprocket
    • Asymmetrical version
    • Installed position, refer to Fig 2
15. Bolt
    • 30 Nm +90°
    • Replacing
16. Seal
    • Replacing
17. Chain tensioner
    • Removing and installing, refer to TIMING MECHANISM DRIVE CHAIN, REMOVING AND INSTALLING .
18. Bolt
    • 9 Nm
19. Crankshaft
20. Bolt
    • 10 Nm +90°
    • Replacing

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