Overview - VALVETRAIN: Notes
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2020 Audi S4, 2020 Audi A4, 2019 Audi S4, 2019 Audi A4, and 2018 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
- 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
- Only replace the cylinder head and cylinder head cover together
- Valve Stem Seal
- Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
- Valve Spring
- Hydraulic Lifter
- Do not interchange
- Coat the contact surface with engine oil
- Valve Spring Retainer
- Valve Retainers
- 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
- Coat the contact surfaces with engine oil
- Exhaust Camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigauge® (roller rocker lever removed)
- Axial play: New 0.1 +0.102-0.05 mm
- Radial clearance: 0.024 to 0.066 mm
- Maximum run out: 0.04 mm
- Cylinder Head Cover
- With integrated camshaft bearings
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Only clean the sealing surface, reworking is not permitted.
- Remove old sealant residue.
- Only replace the cylinder head and cylinder head cover together
- Bolt
- Ball Pin
- 9 Nm
- For the engine cover
- Bracket
- For the wiring harness
- Bolt
- 9 Nm
- Plugs
- O-ring
- Always replace after removing.
- O-ring
- No replacement part: Included in the cam adjustment actuator delivery package
- Coat with engine oil
- Cam Adjustment Actuator
- Cam Adjustment Actuator 1 -F366-
- Cam Adjustment Actuator 2 -F367-
- Cam Adjustment Actuator 3 -F368-
- Cam Adjustment Actuator 4 -F369-
- Cam Adjustment Actuator 5 -F370-
- Cam Adjustment Actuator 6 -F371-
- Cam Adjustment Actuator 7 -F372-
- Cam Adjustment Actuator 8 -F373-
- Removing and installing. Refer to CAM ADJUSTMENT ACTUATOR, REMOVING AND INSTALLING .
- Bolt
- 4.5 Nm
- Spring
- Ball
- For sliding bar
- Installing. Refer to SLIDING BAR BALL, INSTALLING .
- Intake Camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check the radial clearance using Plastigauge® (roller rocker lever removed)
- Axial play: new 0.1 +0.102-0.05 mm
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
- Alignment Pin
- Quantity: 2
- Intake Valve
- Do not rework, only lapping is permitted
- Valve dimensions. Refer to VALVE DIMENSIONS .
- Valve guides, checking. Refer to VALVE GUIDES, CHECKING .