Overview - Camshaft Timing Chains

Fig 1: Camshaft Timing Chains Exploded View

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 9 Nm
2. Chain Tensioner
   • Is under tension
   • Remove the Locking Pin:T40011  before removing
3. Timing Chain Tensioning Rail
4. Guide Pin
   • 20 Nm
5. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 2.
6. Control Valve
   • 35 Nm
   • Left-hand thread
   • Depending on the version, remove with either the Assembly Tool :T10352  or Assembly Tool :T10352/1A 
7. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 2.
   • Always replace after removing.
8. Washer
9. Bearing Bracket
   • Removing and installing. Refer to BEARING BRACKET, REMOVING AND INSTALLING .
10. Camshaft Timing Chain Guide Rail
11. Camshaft Housing
12. Camshaft Timing Chain
    • Before removing, mark the running direction with paint
13. Camshaft Timing Chain Guide Rail
14. Guide Pin
    • 20 Nm
15. Three Stage Chain Sprocket
    • Crankshaft
    • Installation position. Refer to Fig 3.

Fig 2: Bearing Bracket Tightening Sequence

• Replace the bolts that were tightened with an additional turn after removing them.

-- Tighten the bolts in the steps shown in the sequence:

Fig 3: Chain Sprocket Crankshaft

• Both surfaces -arrows- must align.