3802917
Piston Ring Set
Cummins®

The Cummins 3802917 Piston Ring Set is designed for heavy-duty truck engines to enhance performance and efficiency by ensuring proper sealing of the combustion chamber, controlling oil consumption, and contributing to overall engine efficiency. This part is significant in maintaining engine health and performance.

Basic Concepts of Piston Ring Sets

Piston ring sets are components in internal combustion engines that seal the combustion chamber, control oil consumption, and improve engine efficiency. They prevent combustion gases from escaping into the crankcase and regulate oil reaching the combustion chamber for lubrication and cooling of the piston and cylinder wall. Effective piston rings ensure efficient combustion and reduce friction ¹.

Purpose of the Cummins 3802917 Piston Ring Set

This Cummins part is designed to seal the combustion chamber, control oil consumption, and enhance engine efficiency. It prevents gas leakage, ensuring effective use of combustion force to move the piston. It also scrapes excess oil from the cylinder walls to maintain proper lubrication levels and reduce friction, contributing to efficient combustion ².

Key Features

The 3802917 is made from high-quality materials offering durability and resistance to wear. Its design specifications meet the demanding requirements of heavy-duty truck engines. Unique attributes may include advanced coatings or treatments that enhance performance and longevity.

Benefits

Using this part offers improved engine performance by ensuring efficient combustion and reducing friction. It increases fuel efficiency by maintaining optimal combustion conditions and reduces emissions through efficient combustion. The durability of the piston ring set ensures long-term reliability and reduced maintenance costs ³.

Installation Process

Proper installation of the 3802917 is crucial for optimal performance and longevity. The process involves cleaning the cylinder bore, inspecting the piston and rings for damage, and installing the rings with the correct end gaps and orientation. Following manufacturer guidelines ensures the rings are seated properly and the engine operates efficiently.

Maintenance and Troubleshooting

Maintaining the 3802917 involves regular inspections for wear or damage and following cleaning procedures to remove contaminants. Troubleshooting techniques for issues such as oil consumption, compression loss, and piston ring failure include inspecting the rings for proper seating, checking the cylinder bore for wear, and ensuring the piston and rings are free of contaminants.

Manufacturer Information - Cummins

Cummins Inc. is a well-established manufacturer known for producing high-quality automotive components for heavy-duty applications. The company’s history of innovation and commitment to excellence is reflected in the design and performance of its products, including the 3802917.

Role of Part 3802917 Piston Ring Set in Engine Systems

The 3802917 is an essential component within the engine piston kit, contributing significantly to the overall performance and efficiency of the engine system. It creates a seal within the cylinder, maintaining compression within the combustion chamber, ensuring effective compression of the air-fuel mixture before ignition. The efficiency of this seal directly influences the engine’s power output and fuel efficiency.

The piston ring set also controls oil consumption by regulating the amount of oil that passes between the piston and the cylinder wall, helping to lubricate the cylinder wall and reduce friction and wear. This lubrication is essential for the longevity and smooth operation of the engine.

Furthermore, the piston ring set assists in heat transfer from the piston to the cylinder walls. Efficient heat dissipation is necessary to prevent overheating and ensure optimal engine performance. The rings’ design and material properties are tailored to facilitate this heat exchange while withstanding the high temperatures and pressures within the engine.

Components of Cummins Piston Ring Set 3802917

Oil Piston Ring (3933585)

The oil piston ring, identified by the part number 3933585, controls the amount of oil that reaches the cylinder walls. By regulating oil flow, this ring ensures that the piston and cylinder maintain a proper lubrication level, which is essential for reducing friction and wear. The oil ring typically consists of a main ring and two side rails, which work together to scrape excess oil from the cylinder walls and return it to the crankcase.

Compression Piston Ring (3942262)

The first compression piston ring, denoted by the part number 3942262, creates a seal between the piston and the cylinder wall, which is crucial for maintaining compression within the combustion chamber. By ensuring that the air-fuel mixture remains compressed, the ring helps to maximize the engine’s power output and fuel efficiency. The compression ring is usually made from high-strength cast iron or other durable materials to withstand the high pressures and temperatures within the engine.

Compression Piston Ring (3942362)

The second compression piston ring, with the part number 3942362, works in tandem with the first compression ring to provide a dual-layer seal. This additional ring enhances the overall sealing effectiveness, further preventing combustion gases from escaping past the piston. The dual-ring configuration is particularly important in high-performance or high-stress engines, where maintaining optimal compression is critical for performance and longevity. Like the first compression ring, this ring is constructed from robust materials to endure the harsh conditions inside the engine.

Conclusion

The Cummins 3802917 Piston Ring Set is integral to the engine piston kit, enhancing compression, controlling oil consumption, and aiding in heat transfer, all of which are fundamental to the engine’s operation and durability. Proper installation, maintenance, and understanding of its components ensure optimal performance and longevity of the engine.