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. Model Applicability: passion_Pro Splendor_Pro Splendor_Plus Splendor_NXG Splendor_iSmart HF_DELUXE HF_Dawn Passion_Plus