BMW 11517586925 Engine Water Pump

The M54 engine incorporates a normally geared centrifugal water pump located at the front that circulates the coolant through the system once when the engine is under operation. However, the N52 engine has positioned an electrical water pump at the right side of the engine head to enhance effectiveness and flexibility on heating and cooling of the engine because it has the aptitude to run independently with the engine. In cold starts, a low rate of coolant circulation is employed to speed up warm up of the engine as against the normal high rate or circulation including circulation with the engine off, thus optimizing on engine fuel consumption and durability to failure. The pump is regulated by the DME who monitors load factor, engine operating range and a number of temperature sensors, for controlling both the coolant pump and its speed. Further, the electric coolant pump has a function of self-diagnostics: impeller speed deviation, the presence of a foreign object, a deviation of coolant-water ratio, the presence of air in a cooling system can be noted and stored.