BCBC M-90 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump is a standard replacement part built for dependable oil pressure control. It uses gear and gerotor technology, close-tolerance machining, and individually tested flow and pressure performance for consistent operation. Fits a wide range of Nissan applications, including Nissan 240Z, Nissan 280ZX, and Nissan Maxima coverage.

Key Features

• Standard replacement engine oil pump for stock-style service.
• 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.
• Rust preventative finish for added surface protection.
• Gasket or seal included for installation preparation.

Detailed Description

Melling M-90 is an engine oil pump engineered and assembled in the USA to support proper engine lubrication in stock applications. The pump uses machined steel gears, a cast iron housing, and a cast iron cover to maintain efficient oil delivery, while the standard pressure and standard volume design keeps the pump aligned with original-style service needs. The M-90 part number is commonly referenced in replacement searches for Nissan 240Z, Nissan 280ZX, and Nissan 510 applications, and M-90 cross-references include Sealed Power 224-41901 for the same application.

Brand Line: Stock indicates a standard replacement product line focused on direct service use rather than modified performance setups.

What It Helps Solve

• Low oil pressure caused by a worn pump.
• Inconsistent oil delivery from aging internal components.
• Excess wear from reduced pump efficiency.
• Service replacement needs for stock engine rebuilds.
• Oil circulation issues related to tired gears or housing wear.

Installation Notes and Tips

Verify fitment by year, make, and model before installation. Confirm pickup tube diameter, mounting hole pattern, and pump style match the original application. Replace related sealing components as needed during engine service, and prime the pump before startup to establish oil pressure quickly. Fits 1969-1986 Nissan applications listed in the fitment table, including 1970-1973 Nissan 240Z, 1979-1983 Nissan 280ZX, and 1982-1984 Nissan Maxima.

Quality Assurance

Melling states that each pump is individually tested for pressure and flow, with production built to high manufacturing standards using quality materials. The M-90 is made in the USA and designed for consistent engine oil pump performance in standard replacement service.