Cayenne GTS (9PA) V8-4.8L (2008)
Grinding the valve seat
4. Carry out the grinding operation for each valve that is replaced. Check for leaks using some fuel and installed spark plugs. The fuel must not
escape through the valve seat. Carefully remove valve grinding paste.
5. Fit valve lock.
Locking valves
6. Replace valve-stem seals.
7. Fit valve springs, concave washer and valve keys. To do this, place valve springs (there are two in the exhaust valve in the turbo engine) on the
bottom concave washer. Place top concave washer in position.
Information
The mechanic must practice for use of the assembly cartridge to be effective. Some repetitions must be made to ensure that the valve keys are correctly
held in place.
8. Insert valve keys into the assembly cartridge.
8.1.
Press the spring washer of the assembly fixture downwards -1- and insert the valve key -2- with the narrow end pointing downwards.
Valve key in assembly fixture
8.2.
Ensure that the valve keys fit symmetrically and are inserted as far as they will go in the tool. The spring washer automatically locks the valve