DJ Rock OP3104HV Engine Oil Pump

Engine Oil Pump Overview

The DJ Rock OP3104HV engine oil pump is a high-volume gear-style pump built for applications that need consistent oil pressure and steady circulation. It is a direct-fit style replacement for a wide range of Chevrolet, GMC, and related GM vehicles, including Chevrolet Silverado 1500 and GMC Sierra 1500 applications with the specified 3/4 inlet and high-volume requirement.

Built with a cast iron housing and a drive shaft design, this pump is engineered to move oil through the engine under pressure to protect rotating and sliding components. The OP3104HV is a practical choice for rebuilds and repairs where oil delivery, pressure control, and durability matter.

• High-volume gear pump for increased oil flow demand
• Cast iron housing for strength and heat resistance
• Drive shaft design for mechanical oil pump operation
• Standard pressure output with internal pressure regulation
• Premium grade construction for engine service applications

Product Details

The OP3104HV uses a gear-type pumping mechanism and includes a pressure relief function to help regulate oil pressure during changing engine conditions. According to the manufacturer description, the pump is built to maintain oil flow under pressure, reducing friction and wear on internal engine parts. This part cross-references Melling M155HV and Speed Pro 224-43469V for the same application.

Compatible With Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Express 1500, GMC Savana 1500, and many other GM truck, van, and performance applications listed in the fitment data. The OP3104HV part number is also used across several Chevrolet and GMC platforms that require a high-volume oil pump with a 3/4 inlet specification.

Common Uses

• Low oil pressure caused by a worn or inefficient pump
• Oil circulation issues during engine rebuilds
• Pressure control concerns under cold-start or high-speed operation
• Wear-related lubrication problems in high-mileage engines
• Replacement for a damaged cast iron oil pump housing

Installation Notes

Verify the engine’s inlet specification and oil pump type before installation. This pump is listed with two mounting holes, a drive shaft drive type, and a high-volume output profile, so matching the original configuration is important for proper operation. Confirm fitment for the exact Chevrolet Silverado 1500, GMC Sierra 1500, or other listed application before ordering.

Quality Assurance

DNJ engine oil pumps are manufactured to meet or exceed OEM quality standards, with durable materials and precision internal components intended for demanding engine service. The OP3104HV is built for reliable oil delivery and pressure regulation in compatible GM applications.