BCBC M128 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump is a standard replacement unit built for dependable oil pressure control. It is made in the USA and uses gear and gerotor technology to support efficient pump operation in stock applications.

Fits 1986-2011 Ford Ranger, N/A. Fits 1991-2010 Ford Explorer, N/A. Fits 2007-2010 Ford Explorer Sport Trac, N/A. Fits 2001-2005 Ford Explorer Sport Trac, N/A. Fits 2005-2010 Ford Mustang, N/A. Fits 1994-2010 Mazda B4000, N/A. Fits 1998-2010 Mercury Mountaineer, N/A. Fits 2001-2003 Ford Explorer Sport, N/A. Fits 1990-1997 Ford Aerostar, N/A. Fits 1991-1994 Mazda Navajo, N/A. Fits 1986-1990 Ford Bronco II, N/A. Fits 1988-1989 Merkur Scorpio, N/A.

Key Features

• Standard replacement oil pump for stock engine applications.
• Steel gears and aluminum housing for durable construction.
• Gear-driven design with close-tolerance machining for consistent pressure.
• Rust preventative finish and included gasket or seal.
• Individually tested for pressure and flow before release.

Detailed Description

Melling M128 is an engine oil pump engineered for stock-style service where stable oil delivery matters. The pump uses machined steel gears, an aluminum cover and housing, and precision-ground end plates to support wear resistance and efficient operation. It is built with standard pressure and standard volume characteristics, and the pump cover is included as part of the assembly. This part cross-references Sealed Power 224-43431 and DNJ OP421 for the same application.

For Ford Ranger, Ford Explorer, and Mazda B4000 applications, this pump provides a direct replacement option for maintaining proper lubrication system performance. The M128 part number is commonly used across multiple Ford and Mazda platforms, making it a practical choice when matching an OE-style oil pump to the correct engine family.

What It Helps Address

• Low or inconsistent engine oil pressure.
• Wear in an aging stock oil pump.
• Reduced oil circulation from a failing pump assembly.
• Noise or pressure fluctuation related to pump wear.
• Need for a standard replacement oil pump during engine service.

Installation Notes and Quality

Verify engine application and pump specifications before installation. Confirm gasket or seal requirements during service and inspect the pickup tube and related oiling components for wear or blockage. Proper priming and clean assembly practices are important for initial startup.

Melling manufactures this pump in the USA and tests each unit for pressure and flow under conditions intended to reflect real engine operation. The M128 is built to production standards using quality materials for consistent service performance.