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Home >> Volkswagen >> 2021 >> Atlas SEL R-Line, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Cylinder Head, VALVETRAIN (2.0L)) >> 15 Cylinder Head, VALVETRAIN >> Chain Drive >> Overview - Camshaft Timing Chains

Overview - Camshaft Timing Chains

WARNING: This page is about a different variant/trim than selected.
NOTE:

After performing work on the chain drive the adaptation value in the engine control module must be adapted. To do so, turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

Engine control module, functions 

0001 - Adaptation after repair work on chain drive 

Fig 1: Camshaft Timing Chains Exploded View
GWWA15-11799Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Bolt
    • 4 Nm +90°
    • Always replace
  2. Chain Tensioner
    • Is under tension
    • Secure using the Tensioner Locking Tool: T40267  before removing
  3. Timing Chain Tensioning Rail
  4. Guide Pin
    • 20 Nm
  5. Bolt
    • Always replace
    • Tightening specification and sequence. Refer to Fig 3.
  6. Adapter Sleeve
    • Pulled into the cylinder head with the bolt
  7. Control Valves
    • 35 Nm
    • Left-hand thread
    • Depending on the version, remove using the Assembly Tool: T10352/2  or Assembly Tool : T10352/4  .
    • Checking using the Vehicle Diagnostic Tester. Refer to Fig 2.
  8. Bearing Bracket
    • Tightening specification and sequence. Refer to Fig 3.
  9. Camshaft Timing Chain Guide Rail
  10. Camshaft Housing
  11. Camshaft Timing Chain
  12. Camshaft Timing Chain Guide Rail
  13. Guide Pin
    • 20 Nm
  14. Three Stage Chain Sprocket
    • Crankshaft
    • Installation position. Refer to Fig 4.

Checking the Control Valve

Fig 2: Checking The Control Valve
GWWN15-11343Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- The piston -1- must be pushed in approximately 3 mm against the spring force. It must not become stuck while doing so.

Bearing Bracket - Tightening Specifications and Sequence

Fig 3: Bearing Bracket (With Aluminum Bolts) Tightening Sequence
GWWA15-11797Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

The adapter sleeve will be pulled in the cylinder head with the bolt -1-.

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

Bearing Bracket with Adapter Sleeve and Steel Bolts

Step Bolt Tightening Specification/Additional Turn for Steel Bolts
1. -1- 3 Nm
2. -1 to 6- 9 Nm

Bearing Bracket without Adapter Sleeve and Aluminum Bolts

Step Bolt Tightening Specification/Additional Turn for Aluminum Bolts
1. -1 to 6- 4 Nm
2. -1 to 6- 180°

Three Stage Chain Sprocket - Installed Position

Fig 4: Chain Sprocket Crankshaft
GWWA15-10469Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
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