DJ Rock PR3165 Engine Piston Ring Set

Engine Piston Ring Set Overview

DJ Rock PR3165 is a premium engine piston ring set built to restore sealing between the piston and cylinder wall. It is used in a wide range of Chevrolet, GMC, and related GM applications, including Chevrolet Silverado 1500 and GMC Sierra 1500 engine rebuilds.

PR3165 is engineered for service work where compression control, oil regulation, and thermal stability matter. The ring package uses a 1.5 mm top compression ring, 1.5 mm second compression ring, and 3 mm oil ring with a 96 mm bore diameter.

Key Features

• Premium-grade piston ring set for internal engine service
• Top, second, and oil ring design for complete cylinder sealing
• Cast iron or steel alloy construction for wear resistance and heat stability
• Surface treatments help reduce friction and improve sealing performance
• Manufactured to meet or exceed OEM quality standards
• Fits Chevrolet Silverado 1500, GMC Sierra 1500, and other GM truck and SUV applications

Detailed Description

The DJ Rock PR3165 piston ring set is intended for engine rebuild and overhaul work where consistent cylinder sealing is required. It supports compression retention, oil control, and heat transfer across the engine, making it a practical choice for service on Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, and other listed applications. The PR3165 part number is associated with a 96 mm bore and ring thicknesses of 1.5 x 1.5 x 3.0 mm, which should be matched to the engine specification during assembly. This part cross-references Hastings Piston Rings 2M4978 and Sealed Power E-937K for the same application.

What It Is Used For

• Restoring cylinder compression after wear or ring fatigue
• Reducing oil consumption caused by worn ring sealing surfaces
• Improving combustion sealing during an engine rebuild
• Supporting heat transfer from the piston to the cylinder wall
• Addressing blow-by and uneven cylinder sealing

Installation Notes and Tips

Verify bore diameter, ring thickness, and engine code before installation. The fitment notes include complete-engine service applications and engine-specific references such as LR4 and LY2 on certain vehicles. Proper ring gap measurement, cylinder inspection, and clean assembly practices are essential for correct installation. Confirm the PR3165 application against the engine being rebuilt before final assembly.

Quality Assurance

DNJ engine piston ring sets are manufactured to meet or exceed OEM quality standards and use high-strength materials with advanced surface treatments for durability and sealing performance.