Camshaft: Description and Operation

6. Camshaft
The DOHC engine uses four camshafts in all; intake and exhaust camshafts on the RH bank and intake and exhaust camshafts on the LH bank.
The cam nose part is finished with "chill" treatment to increase wear resistance and anti-scuffing properties.
Each camshaft is supported by three journals with three camshaft caps. Each camshaft flange is supported by a groove provided in the cylinder head to receive thrust force.
The cam lobes for driving the front and rear exhaust valves of each cylinder are formed such that they differ slightly in operational phase in order to reduce exhaust noise.