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° turn
   • Replace
3. Bolts
   • 5 Nm + 60° turn
   • Replace
4. Mounting Pin
   • For the drive chain sprocket
5. Drive Chain Sprocket
   • For left timing chain
6. Bolt
   • 10 Nm + 90° turn
   • Replace
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° turn
   • Replace
9. Guide Rail
10. Bolt
    • 8 Nm + 45° turn
    • Replace
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° turn
    • Replace
16. Seal
    • Replace
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° 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