BCBC M328 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump is a standard replacement part built for dependable oil pressure and efficient circulation. It is engineered for stock applications and uses gear and gerotor technology to support consistent operation in compatible Ford, Mazda, Mercury, and Merkur engines.

Key Features

• Standard replacement engine oil pump for stock applications
• High-volume design with 20% additional volume over stock
• Steel gears and cast iron housing for durable construction
• Precision-ground end plates for improved wear resistance
• Individually tested for pressure and flow under operating conditions
• Made in the USA

Detailed Description

Part number M328 is a Melling gear-type oil pump designed with close-tolerance machined gears, a cast iron housing, and a rust-preventative finish. The pump includes a gasket or seal and a pump cover, and it is built with standard pressure output and high-volume flow characteristics. This part cross-references Sealed Power 224-43673 for the same application. For buyers searching for a Ford Ranger oil pump, Ford Explorer oil pump, or Mazda B4000 oil pump, M328 provides a direct-fit replacement option for the listed stock applications.

Common Uses

• Low oil pressure caused by a worn pump
• Reduced oil circulation in a high-mileage engine
• Noise or wear related to inconsistent lubrication
• Restoration or maintenance of stock engine oiling performance

Installation Notes and Tips

Verify engine application before installation and confirm the pump drive and pickup dimensions match the original setup. Clean the oiling system thoroughly before assembly, and prime the pump before initial startup to help establish oil pressure quickly. Fitment includes 1986-2011 Ford Ranger, 1991-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2001-2005 Ford Explorer Sport Trac, 1994-2010 Mazda B4000, 1998-2010 Mercury Mountaineer, 2001-2003 Ford Explorer Sport, 1990-1997 Ford Aerostar, 1991-1994 Mazda Navajo, 1986-1990 Ford Bronco II, and 1988-1989 Merkur Scorpio.

Quality Assurance

Melling manufactures this oil pump in the USA and tests each unit for pressure and flow to verify operation under conditions that duplicate real engine use. Part number M328 is assembled to production standards using quality materials for consistent service in the specified applications.