Timing Mechanism Drive Chain Overview

Fig 1: Identifying Timing Mechanism Drive Chain Overview

Courtesy of AUDI OF AMERICA, LLC

1. Guide Rail
2. Bolt
   • 10 Nm plus an additional 90° turn
   • Replace
3. Bolts
   • 5 Nm plus an additional 60° turn
   • Replace
4. Pivot Pin for Drive Sprocket
5. Drive Sprocket for Left Timing Chain
6. Bolt
   • 10 Nm plus an additional 90° turn
   • Replace
7. Power Take-Off Drive Chain
   • Mark the running direction with paint for reinstallation
   • Removing and installing, refer to TIMING MECHANISM DRIVE CHAIN 
8. Bolt
   • 10 Nm plus an additional 90° turn
   • Replace
9. Guide Rail
10. Bolt
    • 8 Nm plus an additional 45° turn
    • Replace
11. Drive Chain Sprocket Bearing Plate
    • For the right camshaft timing chain
    • Asymmetrical version
12. Drive Sprocket for Right Timing Chain
    • Installed position, refer to Fig 2
13. Thrust Washer
    • asymmetrical version
    • Installed position, refer to Fig 2
14. Pivot Pin for Drive Sprocket
    • Asymmetrical version
    • Installed position, refer to Fig 2
15. Bolt
    • 30 Nm plus an additional 90° turn
16. Gasket
    • Replace
17. Chain Tensioner
    • Removing and installing, refer to TIMING MECHANISM DRIVE CHAIN 
18. Bolt
    • 9 Nm
19. Crankshaft
20. Bolt
    • 10 Nm plus an additional 90° turn
    • Replace

Fig 2: Locating Mounting Pins For Camshaft Timing Chain Drive Sprocket

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