In the overhead cam arrangement, where are both the camshaft and valve assemblies installed?

In an overhead cam arrangement, both the camshaft and valve assemblies are located in the cylinder head. This design permits the camshaft to operate the valves directly or through shorter pushrods compared to other arrangements, allowing for a more compact engine design and potentially improved performance. By placing the camshaft in the cylinder head, it reduces the distance the motion has to travel from the camshaft to the valves, resulting in quicker valve timing and increased responsiveness.

The design also allows for more efficient intake and exhaust flow due to the proximity of the valve mechanism to the combustion chamber. This arrangement often contributes to a higher power output and can enhance the engine’s overall efficiency and performance characteristics.