It is part of the control system, it protects the steering rack from dirt and connects the individual components of the control system.
A crankcase is the housing for the crankshaft. Oil pan is at the bottom of the crankcase and the majority of the engine's oil is held within the crankcase. Engine block is on the top of the crankcase.
It serves as a camshaft holder, located on the engine block.
The timing chain cover is responsible for keeping dirt from entering the inside of the engine. Due to the fact that the timing chain is housed inside the engine, the timing cover even helps to keep the timing chain solid and secure for smooth operation. The timing cover is constructed of aluminum and works in conjunction with the timing cover gasket to keep oil from leaking onto the ground.
The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a direct injection engine) to each intake port in the cylinder head(s). Even distribution is important to optimize the efficiency and performance of the engine. It may also serve as a mount for the carburetor, throttle body, fuel injectors and other components of the engine.
A transaxle is a single mechanical device which combines the functions of an automobile's transmission, axle, and differential into one integrated assembly.
The oil pump in an internal combustion engine circulates engine oil under pressure to the rotating bearings, the sliding pistons and the camshaft of the engine. This lubricates the bearings, allows the use of higher-capacity fluid bearings and also assists in cooling the engine.
The cylinder head cover also contains pathways for coolant to cool the engine, and oil for lubrication purposes.