Engine Component Description: Valves
WARNING: This page is about a different car, the 2011 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.
There are 2 intake and 2 exhaust valves per cylinder. Rotators are used on all of the intake valves. The rotators are located at the bottom of the valve spring to reduce valve train reciprocating mass. Positive valve stem seals are used on all valves.