BCBC M191 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump, part number M191, is a standard replacement pump built for consistent oil pressure and efficient circulation. It uses a rotary design with close-tolerance machining and precision-ground end plates for dependable operation in stock applications.

Key Features

• Standard replacement engine oil pump for stock applications
• Rotary oil pump design with standard pressure and standard volume output
• Cast iron housing and cover for durable construction
• Powdered metal rotor for consistent internal operation
• Gasket or seal included; O-ring included
• Individually tested for pressure and flow under operating conditions

Detailed Description

Melling part number M191 is engineered for applications that require reliable oil delivery from a crankshaft-driven pump. The cast iron housing, precision-ground cover, and powdered metal rotor support stable performance, while the close-tolerance gear and gerotor design helps maintain proper engine pressure and efficient pump operation. This pump is a practical choice for stock-style service on Mazda Protege, Mazda Miata, Ford Escort, Mercury Tracer, and related applications listed in the fitment data.

The M191 is also built with a rust preventative finish and a five-hole mounting pattern. It is listed with a 16.00 mm inlet size, a 0.630 in pickup tube diameter, and standard pressure/standard volume specifications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Low or inconsistent engine oil pressure
• Reduced oil circulation in a worn pump assembly
• Noise or wear related to poor lubrication flow
• Service replacement needs for stock engine maintenance

Installation Notes and Tips

Verify the casting number, mounting pattern, inlet size, and pickup tube dimensions before installation. Confirm that the crankshaft-driven layout and standard pressure specification match the original application. Use the included gasket or seal during assembly and follow the vehicle service procedure for priming and torque specifications.

Quality Assurance

Melling manufactures this oil pump to production standards and tests each unit for pressure and flow to verify operation before release.