BMW Water Pump and Thermostat Replacement Kit (E39) - 11517509985KT1

Product Information

An engine water pump is a crucial component of a vehicle's cooling system. It circulates coolant (a mix of antifreeze and water) from the radiator through the engine and back to the radiator to prevent the engine from overheating. The pump is typically driven by the engine via a belt, chain, or gear. A water pump's key functions are to maintain a consistent flow of coolant through the engine block, cylinder heads, and radiator and regulate engine temperature to prevent overheating or freezing in extreme conditions.

• Coolant leak through weep hole
• Play at water pump pulley shaft indicating a bad bearing
• Squeaking noise coming from pump at idle
• Overheating conditions
• Low coolant light on instrument cluster indicating a cooling system leak

Additional Information

How to Replace a Water Pump on an E39 BMW 5-Series (6-cylinder)

About EMP Stewart

In January of 2001, Stewart Components was acquired by Engineered Machined Products, Inc., in a strategic move by EMP to expand its water pump line, while entering a new niche market focused on the high performance racing industry. EMP is North America's leading supplier of cooling pumps in the diesel industry, and is a recognized leader in the development and advancement of pumps and pumping technologies. Together, EMP and Stewart Components have combined forces to bring advanced, innovative engineering and manufacturing abilities to the high performance market. Both companies have extensive knowledge and experience in the utilization of design and manufacturing software, and are able to apply sophisticated mathematical models to analyze specific issues applicable to the high performance market. These capabilities have led to great performance gains in previous water pump designs, along with altogether different products and ideas that have proven more efficient than current cooling system components.