Metelli PA243 Engine Water Pump

Metelli PA243 Engine Water Pump

The Metelli PA243 engine water pump is a new replacement water pump built for BMW cooling system service. It features an aluminium housing, a cast iron impeller, and a roller/ball bearing design for dependable coolant circulation in the applications listed below.

Key Features

• New engine water pump for BMW cooling system repair
• Aluminium housing for a durable, lightweight pump body
• Cast iron impeller with 14 vanes for coolant movement
• Roller/ball bearing construction for smooth shaft support
• Gasket included for installation
• Impeller outside diameter: 70 mm
• Bearing outside diameter: 30 mm

Detailed Description

Metelli PA243 is an OE-style engine water pump for select BMW 325e, 325es, 325i, 325is, 528e, and 528i applications. It is built with an aluminium housing and a cast iron impeller to match the demands of engine cooling service, while the 14-vane impeller design helps maintain coolant flow through the system. This part number, PA243, is a direct replacement option for BMW cooling system maintenance where the original pump has worn bearings, leakage, or reduced circulation.

This part cross-references Airtex AW9119 and Gates 20559 for the same application.

What It Helps Address

• Coolant leakage from a worn pump seal or housing
• Overheating caused by reduced coolant circulation
• Noise from failing pump bearings
• Impeller wear that limits coolant movement
• Cooling system service on BMW 325e, 325es, 325i, 325is, 528e, and 528i models

Installation Notes and Tips

Verify engine application before installation, especially on 1979-1981 BMW 528i models, which are listed for engines with a disengaging fan. Inspect the mating surface, replace the gasket supplied with the pump, and check the thermostat, hoses, and coolant condition during service. Proper bleeding of the cooling system is important after installation to help prevent air pockets.

Quality Assurance

Metelli supplies this PA243 water pump as a new replacement component with gasket included. The pump uses an aluminium housing, cast iron impeller, and roller/ball bearing construction for service-focused cooling system repair.

Compatible With

• Fits 1984-1987 BMW 325e, N/A
• Fits 1986-1987 BMW 325es, N/A
• Fits 1987 BMW 325i, N/A
• Fits 1987 BMW 325is, N/A
• Fits 1982-1987 BMW 528e, N/A
• Fits 1979-1981 BMW 528i, N/A; fits engines with disengaging fan.