BCBC M155HV Engine Oil Pump

High Volume Oil Pump

The Melling M155HV is a high volume engine oil pump built for applications that need increased oil flow and stable pressure control. It is made in the USA and uses gear and gerotor engineering to deliver consistent lubrication performance in demanding stock applications.

Key Features

• High volume design increases oil flow by an average of 20% over stock.
• Standard pressure configuration for controlled oil delivery.
• Steel gears and cast iron housing for durable pump construction.
• Precision-ground end plates for improved wear resistance.
• Individually tested for pressure and flow under operating conditions.
• Improved design grade with rust preventative finish.

Detailed Description

This Melling oil pump, part number M155HV, is engineered with close-tolerance machined gears and a spur gear layout to support efficient operation and proper engine pressure. The cast iron housing and cover, along with the included pump cover and gears, reflect a design focused on consistent lubrication performance. It is a fitment-based replacement for a wide range of Chevrolet, GMC, and related GM applications, including Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Camaro models listed in the fitment data. The M155HV is also cross-referenced to Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Low oil pressure at idle
• Reduced oil circulation in a worn pump
• Restoring lubrication performance after engine service
• Replacing a stock pump with a higher-volume unit
• Addressing pressure consistency concerns in high-mileage engines

Installation Notes and Tips

Fitment is application-specific and requires the IS-55E oil pump intermediate shaft with steel guide on listed vehicles. Verify engine configuration and pump drive compatibility before installation. The pump uses a drive shaft design and does not include a gasket or seal, so confirm all required sealing components are on hand before assembly. Part number M155HV should be matched to the vehicle listing exactly, especially on Chevrolet Silverado 1500 and GMC Sierra 1500 applications.

Quality Assurance

Melling manufactures this pump in the USA and tests each unit for pressure and flow to verify operation under conditions that simulate real engine use. The M155HV is built to Melling production standards using quality materials and close-tolerance machining for consistent results.