Overview - VALVETRAIN: Notes
WARNING: This page is about a different car, the 2015 Audi RS 5, 2014 Audi RS 5, and 2013 Audi RS 5. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Risk Of Damaging Valves And Piston Heads After Working On Valve Train.
- To Ensure Valves Do Not Strike Pistons When Starting, Carefully Rotate Engine At Least Two Full Revolutions.
NOTE:
Cylinder Heads With Cracks Between Valve Seats Or Between Valve Seat And Spark Plug Thread Can Still Be Used Without Loss Of Service Life If The Cracks Are Minute (Max. 0.3 Mm Width) Or Only The First Four Threads Of A Spark Plug Thread Are Cracked.
The Illustration Shows The Cylinder Bank 2 Cylinder Head (Left).
- Sealing Plug
- Valve Stem Seal
- Replacing With The Cylinder Head Installed. Refer To VALVE STEM SEALS WITH CYLINDER HEAD INSTALLED, REPLACING .
- Replacing With The Cylinder Head Removed. Refer To VALVE STEM SEALS WITH CYLINDER HEAR REMOVED, REPLACING .
- Valve Spring
- Installed Position. Refer To Figure
- Hydraulic Adjusting Element
- Clipped Into Roller Rocker Lever -Item 8-
- Checking. Refer To HYDRAULIC ADJUSTING ELEMENTS, CHECKING .
- Mark The Installation Position With Paint For Reinstallation
- Lubricate The Running Surfaces Before Installing
- Valve Spring Retainer
- Valve Retainers
- Clip
- Not Available Individually
- Make Sure It Is Secure
- Roller Rocker Lever
- Mark The Installation Position With Paint For Reinstallation
- Check Roller For Easy Movement
- Lubricate The Running Surfaces Before Installing
- Clip To The Hydraulic Adjusting Element -Item 4- With The Clip -Item 7-
- Intake Camshaft
- Removing And Installing. Refer To CAMSHAFT, REMOVING AND INSTALLING .
- Axial Play, Measuring. Refer To CAMSHAFT, MEASURING AXIAL CLEARANCE .
- Radial Play, Measuring. Refer To CAMSHAFT, MEASURING RADIAL CLEARANCE .
- Maximum Run Out: 0.04 mm
- Seal
- Replacing
- Guide Frame
- With Integrated Camshaft Bearings
- Removing And Installing. Refer To CAMSHAFT, REMOVING AND INSTALLING .
- Bolt
- Replacing
- Tightening Sequence. Refer To Figure
- Camshaft Position Sensor 2 -G163-
- Bolt
- Tightening Specification. Refer To OVERVIEW - IGNITION SYSTEM .
- O-Ring
- Replacing
- Bolt
- Tightening Specification. Refer To OVERVIEW - IGNITION SYSTEM .
- Camshaft Position Sensor 4 -G301-
- O-Ring
- Replacing
- Flat Ring
- For Camshaft Adjuster
- Exhaust Camshaft
- Removing And Installing. Refer To CAMSHAFT, REMOVING AND INSTALLING .
- Axial Play, Measuring. Refer To CAMSHAFT, MEASURING AXIAL CLEARANCE .
- Radial Play, Measuring. Refer To CAMSHAFT, MEASURING RADIAL CLEARANCE .
- Maximum Run Out: 0.04 mm
- Cylinder Head
- Valve Guides, Checking. Refer To VALVE GUIDES, CHECKING .
- Intake Valve
- Do Not Rework, Only Lapping Is Permitted
- Mark The Installed Position For Installation Later
- Valve Dimensions. Refer To VALVE DIMENSIONS
- Valve Guides, Checking. Refer To VALVE GUIDES, CHECKING .
- Exhaust Valve
- Do Not Rework, Only Lapping Is Permitted
- Mark The Installed Position For Installation Later
- Valve Dimensions. Refer To VALVE DIMENSIONS
- Valve Guides, Checking. Refer To VALVE GUIDES, CHECKING .