Part I

Part II. Refer to Part II .

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

Courtesy of AUDI OF AMERICA, LLC

Exhaust Valve
- Do not rework, only grinding is permitted
- Valve Dimensions. Refer to VALVE DIMENSIONS .
- Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .
Cylinder Head
- Do not rework the upper sealing surface
- Only replace the cylinder head and cylinder head cover together
Valve Stem Seal
- Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
Valve Spring
Valve Spring Retainer
Valve Keepers
Hydraulic Lifter
- Do not interchange
- Lubricate the contact surface
Clip
- For hydraulic lifter
Roller Rocker Lever
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Mark the installed position for reinstallation.
- Check the roller bearing for ease of movement
- Lubricate the running surfaces before installing
Exhaust Camshaft
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigauge^® (roller rocker lever removed)
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
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 .
- Only replace the cylinder head and cylinder head cover together
Bolt
- Replace after removing
- Loosening. Refer to Figure.
- Tightening Specifications and Sequence. Refer to Figure.
Intake Camshaft
- Removing and Installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigauge^® (roller rocker lever removed)
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
Alignment Pin
Alignment Pin
Intake Valve
- Do not rework, only grinding is permitted
- Valve Dimensions. Refer to VALVE DIMENSIONS .
- Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .