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Home >> Volkswagen >> 2017 >> Golf S, Eng CD CXBA, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine System (Cylinder Head & VALVETRAIN - Service Information - CRUA)) >> 15 Cylinder Head, VALVETRAIN >> VALVETRAIN >> Overview - VALVETRAIN >> Notes

Overview - VALVETRAIN: Notes

WARNING: This page is about a different car, the 2015 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:

Risk of damaging the valves and piston crowns after working on valvetrain.

  • The motor must not be started for about 30 minutes after installing camshafts because the hydraulic lifters must seat themselves.
  • To ensure valves do not strike pistons when starting, carefully rotate the crankshaft at least two turns.
Fig 1: Exploded View Of Valvetrain With Components
GWWN15-10942Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Bolt
  2. Camshaft Position Sensor -G40-
  3. O-ring
    • Always replace after removing.
  4. Cap
    • Replace after removing.
    • Removing: with the camshaft housing installed, pierce through one side of the cover with a punch and pry it out.
    • Installing: drive in without sealant until it is flush using a suitable thrust piece, such as the :3390 
  5. Camshaft Seal
  6. Camshaft Housing
  7. Bolt
  8. Seal
    • Always replace after removing.
    • On vehicles without camshaft adjustment
  9. Cover
    • On vehicles without camshaft adjustment
  10. Bolt
    • 8 Nm
    • On vehicles without camshaft adjustment
  11. Bolt
    • 8 Nm
    • On vehicles with camshaft adjustment
  12. Camshaft Adjustment Valve 1 -N205-
  13. Seal
    • Always replace after removing.
    • On vehicles with camshaft adjustment
  14. Bolt
  15. Housing
    • For the camshaft adjuster
    • On vehicles with camshaft adjustment
  16. Alignment Sleeve
    • On vehicles with camshaft adjustment
  17. Gasket
    • Replace after removing.
    • On vehicles with camshaft adjustment
  18. Control Valve
  19. Camshaft Adjuster
    • On vehicles with camshaft adjustment
      CAUTION:

      Between the camshaft adjuster and camshaft stub there is a friction disc -item  ) OVERVIEW - VALVETRAIN - Friction Disc installed for connection security. Before installing it must be checked that this friction disc is in the camshaft adjuster. Otherwise the camshaft adjuster can become loose while the engine is running and damage the engine.

    • Removing and installing. Refer to CAMSHAFT ADJUSTER, REMOVING AND INSTALLING .
  20. Friction Disc
    • On vehicles with camshaft adjustment
    • Before installing check that the camshaft adjuster is present
  21. Alignment Pin
    • For the camshaft housing
  22. Exhaust Valve
    • Do not rework, only lapping is permitted
    • Mark the installed position for reinstallation.
    • Checking using the Vehicle Diagnostic Tester. Refer to VALVES, CHECKING .
    • Valve Dimensions. Refer to VALVE DIMENSIONS .
    • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
  23. Intake Valve
    • Do not rework, only lapping is permitted
    • Mark the installed position for reinstallation.
    • Checking using the Vehicle Diagnostic Tester. Refer to VALVES, CHECKING .
    • Valve Dimensions. Refer to VALVE DIMENSIONS .
    • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
  24. Cylinder Head
    • The valve seat may not reworked due to a close tolerances.
  25. Valve Stem Seal
  26. Valve Spring
  27. Valve Spring Retainer
  28. Valve Retainers
  29. Hydraulic Lifter
    • Checking using the Vehicle Diagnostic Tester. Refer to HYDRAULIC LIFTERS, CHECKING .
    • Mark the installed position for reinstallation.
    • Lubricate the running surfaces before installing
  30. Roller Rocker Lever
    • Removing and installing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
    • Mark the installed position for reinstallation.
    • Check the roller bearing for ease of movement
    • Lubricate the running surfaces before installing
  31. Clip
    • For hydraulic lifter
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