Part I

For Valvetrain, Engine With One Camshaft Adjusters - PART II. Refer to PART II .

Fig 1: Exploded View Of Valvetrain (Engine With One Camshaft Adjusters - Part I)

Courtesy of AUDI OF AMERICA, LLC

1. Exhaust Valve
   • Do not rework, only lapping is permitted
   • Valve Dimensions. Refer to VALVE DIMENSIONS .
   • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
2. Cylinder Head
3. Valve Stem Seal
   • Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
4. Valve Spring
5. Valve Spring Retainer
6. Valve Retainers
7. Hydraulic Lifter
   • Do not interchange
   • Lubricate the contact surface
8. Clip
   • For hydraulic lifter
9. Roller Rocker Lever
   • Mark the installed position for reinstallation.
   • Check the roller bearing for ease of movement
   • Lubricate the running surfaces before installing
   • Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
10. Exhaust Camshaft
    • Check the radial clearance using Plastigage® (roller rocker lever removed)
    • Radial clearance: 0.024 to 0.066 mm
    • Run-out: maximum 0.04 mm
    • Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
11. Cylinder Head Cover
    • With integrated camshaft bearings
    • Clean the sealing surface, reworking is not permitted.
    • Remove old sealant residue.
    • Removing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
12. Bolt
    • Tightening Specifications and Sequence. Refer to Figure.
    • Always replace after removing
    • Loosening. Refer to Figure.
13. Intake Camshaft
    • Check the radial clearance using Plastigage® (roller rocker lever removed)
    • Radial clearance: 0.024 to 0.066 mm
    • Run-out: maximum 0.04 mm
    • Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
14. Alignment Pin
15. Alignment Pin
16. Intake Valve
    • Do not rework, only lapping is permitted
    • Valve Dimensions. Refer to VALVE DIMENSIONS .
    • Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .