Cayenne Titanium (9PA) V8-4.5L (2006)
Removing tool setup for valve springs
3. Press the white plastic pressure piece with the magnetic insert against the top concave washer to remove the valve keys. The concave washer -2-
and the valve keys -1- are attracted to the magnetic insert and release the valve (loosen valve keys with a screwdriver if they are stuck). Remove
loose components (valve springs, top concave washer and valve keys). Repeat procedure as often as necessary for the affected valves (reposition
tool accordingly).
Valve keys in tool
4. Remove valve lock. Push valve out at the combustion chamber side and remove it from the cylinder head.
Locking valves
Installing exhaust valve
Installing exhaust valve
Information:
Intake valves come in different sizes to exhaust valves. It is impossible to mix them up. Intake valves are identical in the naturally aspirated and
turbo engines.
Exhaust valves in the turbo engine weigh less than exhaust valves in the naturally aspirated engine. They are marked with a green dot. Do not
interchange them.
The valves cannot be touched up afterwards.
The valves can be ground using commercially available valve grinding paste.
1. Apply a small amount of valve grinding paste to the valve seat.
2. Oil the valve stem of a new valve and insert it into the valve guide from the combustion chamber. Push the valve in until it is seated securely in the
valve seat of the cylinder head.
3. Grind in the valve using the commercially available valve grinding tool (with rubber suction cup) by means of rotary movements. To do this, hold
the valve grinder between the palms of both hands and press against the valve seat with rotating movements.