BCBC M371 Engine Oil Pump

Engine Oil Pump Overview

The Melling M371 is a standard replacement engine oil pump built for dependable oil pressure and efficient circulation. It uses rotary pump design, close-tolerance machining, and tested flow and pressure performance to support consistent engine lubrication in compatible applications.

Key Features

• Standard replacement oil pump for engine lubrication service
• Rotary design with gear and gerotor technology
• Aluminum housing and cover with rust-preventative finish
• Powdered metal rotor construction for wear resistance
• Includes gasket or seal and O-ring
• Individually tested for pressure and flow

Detailed Description

Built under the Stock product line, the Melling M371 oil pump is engineered for applications that require standard pressure and standard volume operation. The pump features a crankshaft drive type, six mounting holes, and a rotary oil pump design with aluminum construction for the housing and cover. Melling machines the gears to close tolerances and precision-grinds the end plates to help maintain proper pressure and efficient pump operation. The M371 part number is also cross-referenced with DNJ OP972 for the same application.

Compatible With Toyota Tundra, Toyota Sequoia, Lexus LX470, Toyota Land Cruiser, Lexus GX470, and Toyota 4Runner applications listed in the fitment data. Fits 2000-2009 Toyota Tundra, N/A; Fits 2001-2009 Toyota Sequoia, N/A; Fits 1998-2005 Lexus LX470, N/A; Fits 1998-2005 Toyota Land Cruiser, N/A; Fits 2003-2004 Lexus GX470, N/A; Fits 2003-2004 Toyota 4Runner, N/A.

What It Is Used For

• Restoring oil pressure in a worn or failing pump assembly
• Addressing low oil circulation caused by internal pump wear
• Replacing a pump with damaged gears, rotors, or cover surfaces
• Correcting pressure loss related to inefficient pump operation

Installation Notes and Tips

Verify engine application, drive type, and mounting pattern before installation. Confirm gasket and seal condition during service, and inspect the pickup and related oiling components for contamination or wear. Follow the vehicle service procedure for priming and final pressure verification after installation.

Quality Assurance

Melling states that each M371 oil pump is built to high production standards and individually tested for pressure and flow under conditions that duplicate engine operating conditions. The M371 part number is used across multiple OE-style replacement listings for the same application.