Part I
WARNING: This page is about a different car, the 2024 Audi Q3 and 2023 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.
Part II. Refer to Part II .
- Exhaust Valve
- Do not rework, only lapping 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
- Installation position and allocation. Refer to Figure.
- Exhaust Camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigage (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
- Intake Camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigage (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 lapping is permitted
- Valve Dimensions. Refer to VALVE DIMENSIONS .
- Valve Guides, Checking. Refer to VALVE GUIDES, CHECKING .