Metelli PA430 Engine Water Pump

Engine Water Pump for BMW 318i, 318is, 318ti and Z3

Metelli PA430 is a new engine water pump for select BMW 3 Series and Z3 applications. It features an aluminium housing, cast iron impeller, and a roller/ball bearing design for dependable coolant circulation in the engine cooling system.

Key Features

• New engine water pump for cooling system service
• Aluminium housing for corrosion-resistant construction
• Cast iron impeller with 7 vanes
• Roller/ball bearing design with 36 mm bearing outside diameter
• Includes gasket or seal and O-ring
• Impeller outside diameter: 62 mm

Detailed Product Overview

Built for direct replacement service, the Metelli PA430 water pump is specified for 1991-1999 BMW 318i, 1991-1999 BMW 318is, 1995-1999 BMW 318ti, and 1996-1998 BMW Z3. This part number, PA430, is a practical choice when replacing a worn cooling pump on BMW 318i and BMW Z3 applications where stable coolant flow and sealing integrity are important. This part cross-references Airtex AW9275 and Gates 21728 for the same application.

Common Reasons for Replacement

• Coolant leakage at the pump housing or seal area
• Noise from worn bearing components
• Reduced coolant circulation through the engine
• Overheating caused by pump wear or impeller damage
• Service replacement during cooling system maintenance

Installation Notes and Tips

Verify engine fitment by year and model before installation. Inspect the mating surface, coolant passages, and adjacent cooling system components before fitting the new pump. Replace the gasket or seal supplied with the pump and use the included O-ring during assembly. Follow the vehicle service procedure for coolant refill and bleeding to help restore proper system operation.

Quality Assurance

Metelli manufactures this PA430 water pump as a new replacement component with aluminium housing, cast iron impeller construction, and integrated sealing components for service-ready installation.