BCBC M390 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump, part number M390, is a standard replacement rotary pump built for dependable oil delivery in a wide range of Ford, Lincoln, and Mazda applications. It uses gear and gerotor technology, close-tolerance machining, and precision-ground end plates to support proper engine pressure and efficient pump operation.

Key Features

• Standard replacement engine oil pump for stock applications
• Rotary design with gear and gerotor technology
• Aluminum housing and aluminum cover for durable construction
• Powdered metal rotor material for consistent operation
• Gasket or seal included; pump cover included
• Made in the USA and individually tested for pressure and flow

Detailed Description

The M390 oil pump is engineered and assembled to high production standards using quality materials and close manufacturing tolerances. Its standard pressure and standard volume design makes it a direct service choice for engines that require OE-style oiling performance. The crankshaft-driven layout, four mounting holes, and included O-ring support a straightforward replacement process on covered Ford Explorer, Ford F-150, Ford Mustang, and Lincoln MKZ applications.

This part cross-references DNJ OP4198 and Sealed Power 224-43678 for the same application. The M390 is also listed across multiple Ford, Lincoln, and Mazda platforms, including Ford Transit-150, Ford Taurus, Lincoln MKT, and Mazda CX-9, making it a relevant search match for stock engine oil pump replacement needs.

What It Is Used For

• Restoring oil pressure when the original pump is worn
• Replacing a pump with reduced flow or inconsistent output
• Addressing low oil pressure concerns in stock engine setups
• Servicing engines that need a standard pressure, standard volume pump
• Supporting proper lubrication in high-mileage daily-driven vehicles

Installation Notes and Tips

Verify engine application by year, make, model, and stock configuration before installation. Confirm the pump drive type, mounting pattern, and inlet dimensions match the original unit. Inspect the oiling system, pickup components, and sealing surfaces during service to help ensure proper pump operation after replacement.

Quality Assurance

Melling manufactures this pump in the USA and tests each unit for pressure and flow under conditions that duplicate actual engine operating conditions. Close-tolerance machining, precision-ground end plates, and production-standard assembly support consistent performance and wear resistance.