DJ Rock PR522 Engine Piston Ring Set

Engine Piston Ring Set for Precision Sealing

DJ Rock PR522 engine piston ring set is built for cylinder sealing, oil control, and stable compression in internal combustion engines. With a 90 mm bore diameter and premium-grade construction, this piston ring set supports consistent performance in applications that require accurate ring fit and dependable wear resistance.

For Honda Civic and Toyota Corolla engine rebuild work, PR522 provides the ring dimensions and material quality needed for a proper cylinder wall seal. The PR522 part number is also referenced under interchange number 2C5278.

Key Features

• Premium-grade engine piston ring set for cylinder block service
• 90 mm bore diameter for matched cylinder fit
• Top compression ring thickness: 1.2 mm
• Second compression ring thickness: 1.2 mm
• Oil ring thickness: 2.5 mm
• Cast iron or steel alloy construction for strength and wear resistance
• Surface treatments used to improve sealing, reduce friction, and extend service life
• Built to meet or exceed OEM quality standards

Detailed Description

DJ Rock PR522 is an engine piston ring set engineered to maintain compression, regulate oil consumption, and transfer heat away from the piston during operation. The ring package uses a 1.2 mm top compression ring, 1.2 mm second compression ring, and 2.5 mm oil ring profile, making it a precise choice for rebuilds that require correct ring thickness and bore sizing. The 90 mm bore diameter is a critical specification for engine service where exact cylinder matching matters.

For Honda Civic and Toyota Corolla engine repair projects, PR522 supports a clean cylinder seal and consistent combustion performance when the engine is rebuilt to the correct bore specification. The PR522 piston ring set is manufactured with durable alloy materials and advanced surface finishing to handle heat, friction, and long-term wear in demanding engine conditions.

What It Helps Address

• Low compression caused by worn or damaged piston rings
• Excessive oil consumption from poor oil control ring sealing
• Blow-by from reduced cylinder sealing
• Uneven cylinder performance during engine rebuilds
• Ring wear related to heat, friction, and mileage

Installation Notes and Tips

Verify the 90 mm bore diameter and ring thickness specifications before installation. Measure cylinder bore condition, piston groove clearance, and ring end gap according to the engine service manual. Clean the ring grooves thoroughly and inspect the cylinder walls for taper, scoring, or out-of-round conditions before assembly. Proper break-in procedures help the rings seat correctly after installation.

Quality Assurance

DJ Rock PR522 is manufactured to meet or exceed OEM quality standards for engine rebuild applications. The design uses durable materials and surface treatments selected for sealing performance, wear resistance, and thermal stability.