Dorman 902-077 Engine Auxiliary Water Pump

Reliable Engine Auxiliary Water Pump for Mercedes-Benz Models

The Dorman 902-077 engine auxiliary water pump is designed to maintain optimal cooling system performance in select Mercedes-Benz vehicles. Engineered with durable materials, this pump supports efficient coolant circulation to help prevent overheating and maintain engine reliability.

Key Features of the Dorman 902-077 Auxiliary Water Pump

• Constructed from a combination of plastic, rubber, and steel for durability and longevity
• Black color finish for corrosion resistance and seamless integration
• Clockwise rotation to match factory specifications
• Inlet pipe diameter of 0.52 inches and outlet pipe diameter of 0.5 inches for precise fitment
• Depth of 5.7 inches ensuring proper installation depth
• Includes one auxiliary water pump per package
• Does not include pulley, gasket, seal, or shaft, designed for direct replacement

Detailed Description of the Dorman 902-077 Water Pump

This engine auxiliary water pump is specifically compatible with a range of Mercedes-Benz models including the CL63 AMG, CL65 AMG, CL550, CL600, S63 AMG, S65 AMG, S350, S400, S450, S500, S550, and S600. The pump’s plastic housing combined with rubber and steel components ensures a balance of strength and flexibility, critical for maintaining coolant flow under varying engine conditions. Its black finish helps resist corrosion, while the precise inlet and outlet pipe diameters guarantee a secure connection within the cooling system. The clockwise rotation matches the OEM pump’s operation, ensuring seamless integration without modification.

Common Applications and Issues Addressed

• Restores proper coolant circulation in auxiliary cooling circuits
• Prevents engine overheating caused by failing or inefficient water pumps
• Eliminates coolant leaks associated with worn or damaged pump components
• Supports consistent engine temperature regulation for performance and longevity
• Replaces faulty pumps in Mercedes-Benz AMG and standard models listed

Installation Notes and Tips

• Verify compatibility with your specific Mercedes-Benz model before installation
• Ensure the cooling system is depressurized and cooled before removal
• Inspect related hoses and clamps for wear and replace as necessary
• Use appropriate tools to avoid damage to the pump or mounting points
• Check for proper rotation direction and pipe alignment during installation

Quality Assurance and Warranty Information

Dorman manufactures the 902-077 auxiliary water pump to meet or exceed OEM standards for fit, form, and function. While no pulley, gasket, seal, or shaft is included, the pump is engineered for direct replacement in compatible Mercedes-Benz vehicles. Dorman products typically come with a limited warranty covering defects in materials and workmanship; please refer to Dorman’s official warranty policy for specific terms.