BCBC M452HV-388S Engine Oil Pump

High-volume oil pump for Ram applications

This Melling engine oil pump is a high-volume rotary design built to increase oil flow by an average of 12% over stock. It is made in the USA and uses precision-machined components to support stable oil pressure at idle and consistent engine lubrication.

Key features

• High-volume oil pump with standard pressure output
• Improved design with 12% additional volume over stock
• Aluminum housing with cast iron cover and steel rotor
• Crankshaft-driven rotary pump design
• Gasket, O-ring, pickup screen, and pump cover included
• Individually tested for pressure and flow under operating conditions

Product details

Part number M452HV-388S is engineered for Ram 1500, Ram 1500 Classic, Ram 2500, and Ram 3500 applications listed below. The high-volume gear and gerotor construction is machined to close tolerances, while precision-ground end plates help maintain wear resistance and efficient pump operation. This part number, M452HV-388S, is a direct fit for stock-style applications that call for improved oil delivery without changing the pump’s standard pressure profile.

Melling’s Stock line focuses on replacement components built to production standards using quality materials and tested performance. For buyers comparing M452HV-388S against other oil pump options, the line emphasizes consistent output, controlled tolerances, and application-specific engineering.

Common issues this part addresses

• Low oil pressure at idle
• Reduced oil flow in high-volume service conditions
• Wear-related pump inefficiency
• Inconsistent lubrication from a tired oil pump
• Need for a stock-style replacement with added flow capacity

Installation notes and tips

Verify engine application and pump style before installation. This oil pump uses a crankshaft drive type and a rotary design, with a 24 mm inlet size and four mounting holes. Confirm gasket and seal surfaces are clean, and inspect the pickup tube and related components during service. Fitment includes 2026 Ram 1500, 2013-2024 Ram 1500, 2019-2024 Ram 1500 Classic, 2013-2018 Ram 2500, and 2013-2018 Ram 3500.

Quality assurance

Melling manufactures this oil pump in the USA and tests each unit for pressure and flow under conditions intended to duplicate real engine operation. The M452HV-388S is built to production standards for dependable performance in the listed Ram applications.