Overview - Camshaft Timing Chains

Fig 1: Camshaft Timing Chain Overview

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1. Bolt
   • 4 Nm +90°
   • Replace after removing
2. Chain Tensioner
   • Is under tension
   • Secure using : T40267  before removing
3. Timing Chain Tensioning Rail
4. Guide Pin
   • 20 Nm
5. Bolt
   • Replace after removing
   • Tightening specification and sequence. Refer to Fig 2.
6. Control Valve
   • 35 Nm
   • Left-hand thread
   • Remove with the : T10352/2 
7. Bolt

   M 6 bolt:

   • 8 Nm +90°

     M8 Bolt:

   • 20 Nm +90°
   • Replace after removing
8. Washer
9. Bearing Bracket
10. Camshaft Timing Chain Guide Rail
11. Camshaft Housing
12. Camshaft Timing Chain
    • Before removing, mark the running direction with paint
    • Removing and installing. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .
13. Camshaft Timing Chain Guide Rail
14. Guide Pin
    • 20 Nm
15. Three Stage Chain Sprocket
    • Crankshaft
    • Installed position. Refer to Fig 3

Bearing Bracket - Tightening Specifications and Sequence 

Fig 2: Bearing Bracket - Tightening Sequence

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

If an adapter sleeve is installed, this will be moved with the bolt -1- in the cylinder head.

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

Bearing Bracket with Adapter Sleeve and Steel Bolts 

Bearing Bracket without Adapter Sleeve and Aluminum Bolts 

Three Stage Chain Sprocket - Installed Position 

Fig 3: Chain Sprocket Crankshaft

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

• Both surfaces -arrows- must align across from each other.