BCBC M509 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump, part number M509, is a standard replacement pump built for consistent oil pressure and efficient circulation. It is compatible with Mitsubishi Lancer and Mitsubishi Outlander Sport applications listed below, making it a direct fitment-focused choice for service work on those engines.

Key Features

• Standard replacement oil pump with gear-style operation.
• Powdered metal gears and aluminum housing for durable construction.
• Precision-ground end plates for improved wear resistance.
• Close-tolerance machining supports proper pressure control and efficient pump operation.
• Includes the pump cover, gears, O-ring, and pickup screen as listed in the product data.
• Individually tested for pressure and flow under operating-condition simulation.

Detailed Description

Melling part number M509 is engineered for dependable oil delivery in Mitsubishi engine applications. The pump uses gear and gerotor technology, with machined gears and precision-ground end plates to help maintain correct engine oil pressure and consistent flow. Its aluminum housing, rust-preventative finish, and standard pressure/standard volume design make it a practical replacement for routine engine service. This part cross-references Monroe Shocks & Struts (e.g., 1211A006, 1211A039) for the same application.

Compatible With Mitsubishi Lancer and Mitsubishi Outlander Sport applications, M509 is built to match the requirements of stock fitments listed in the catalog. If you are replacing a worn engine oil pump on a Mitsubishi Lancer or Mitsubishi Outlander Sport, this Melling pump provides a service-ready option with tested pressure and flow performance.

What It Helps Address

• Low or unstable engine oil pressure.
• Reduced oil circulation from a worn pump assembly.
• Excessive wear from inefficient pump operation.
• Service replacement needs for stock engine applications.

Installation Notes and Tips

Verify engine application and fitment before installation. Inspect the pickup screen, sealing surfaces, and related engine components during service, and confirm proper oiling after installation. This pump does not include a gasket or seal, drive shaft, or bolts according to the product data.

Quality Assurance

Melling manufactures this oil pump to high production standards and tests each unit for pressure and flow under conditions that simulate actual engine operation. Part number M509 is built with close-tolerance machining and wear-resistant components for consistent service performance.