Overhead Camshaft is also known OHC that is nothing but valvetrain arrangement that is sets the camshaft of the inner combustion engine of the returning type inside the cylinder head. It also drives lifters or valves in more straight method compared to pushrods and OHV. The components in the OHC system are less as compared to OHV, hence has less mass. This system is driven by the belt or gear system connected to the engine. The size and complexity of the Overhead Camshaft (OHC) can be different as per the manufacturers. Overhead Camshaft’s (OHC) are available in different sizes, different additions, based on features, etc. The design and size of the engine also depended on numbers of cylinders in engines such as V6, V8, V12, etc. Overhead Camshaft’s (OHC) are also available in single or double categories. Then timing of the valve opening and closing can be depended on the rotation of the piston inside the cylinder.