BCBC M451 Engine Oil Pump

Engine Oil Pump Overview

The Melling M451 engine oil pump is a standard replacement pump built for Cummins diesel applications in Ram heavy-duty trucks. It uses gear pump construction with steel gears and a cast iron housing to deliver standard pressure and standard volume operation.

Fits 2004-2010 Dodge Ram 2500, N/A. Fits 2004-2010 Dodge Ram 3500, N/A. Fits 2008-2010 Dodge Ram 4500, N/A. Fits 2008-2010 Dodge Ram 5500, N/A. Fits 2011-2018 Ram 2500, N/A. Fits 2011-2018 Ram 3500, N/A. Fits 2011-2018 Ram 4500, N/A. Fits 2011-2018 Ram 5500, N/A.

Key Features

• Standard replacement oil pump for Cummins engine applications.
• Steel gears and cast iron housing for durable pump construction.
• Gear-type design with timing chain drive.
• Precision-machined gears and ground end plates for consistent oil pressure.
• Individually tested for pressure and flow under operating conditions.
• Rust preventative finish for added surface protection.

Detailed Description

Melling M451 is engineered as a direct replacement oil pump for select Dodge Ram and Ram diesel trucks equipped with Cummins engines. The pump uses gear technology with close-tolerance machining to support efficient oil delivery, while the cast iron cover and housing add strength in demanding engine environments. The pump cover is included, and the unit is built to standard pressure and standard volume specifications.

This part cross-references Monroe Shocks & Struts (e.g., 4988801, 5086845AA) for the same application.

What It Is Used For

• Restoring proper engine oil pressure.
• Replacing a worn or inefficient oil pump.
• Addressing low oil pressure concerns caused by pump wear.
• Supporting consistent lubrication in high-load diesel operation.

Installation Notes and Tips

Verify engine application and part number M451 before installation. This pump uses a timing chain drive and four mounting holes. Gasket or seal is not included, and no drive shaft is included.

Quality Assurance

Melling manufactures this pump to high production standards and tests each unit for pressure and flow to confirm operation under conditions that duplicate real engine use.