Part I
WARNING: This page is about a different car, the 2018 Audi Q3 Quattro, 2018 Audi Q3, 2017 Audi Q3 Quattro, and 2017 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.
For Valvetrain, Engine With One Camshaft Adjusters - 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
- Valve Stem Seal
- Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
- Valve Spring
- Valve Spring Retainer
- Valve Retainers
- Hydraulic Lifter
- Do not interchange
- Lubricate the contact surface
- Clip
- For hydraulic lifter
- 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 .
- 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 .
- 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 .
- Bolt
- 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 .
- 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 .