Cayenne Titanium (9PA) V8-4.5L (2006)
8. Insert valve key assembly tool in tool setup and position in front of the valve stem.
9. When assembling the valve keys, ensure that the assembly tool is inserted at the valve stem end -2- and is then pushed down (the tool remains
secured when this is done -1-). The valve keys click audibly into the valve grooves when the valve key assembly tool is pressed onto the valve.
Check valve keys to ensure that they are installed correctly.
10. Replace all four valve-stem seals for a cylinder and refit valve keys. Only then fit compressed-air hose on the next cylinder and apply compressed
air constantly.
Subsequent work
1. Fit flat-based tappets.
2. Install camshafts.
3. Install engine.
Information
Valve dimensions