The camshaft is driven by the crankshaft. The camshaft has one exhaust and one intake lobe per cylinder.
The two exhaust valves are actuated by a single exhaust lobe and the two intake valves are actuated by a single intake lobe.
The camshaft bearings are lubricated by the rear cam groove. This groove receives oil from the block gallery and oil flows through the center of the camshaft to each cam bearing journal.