4976170
Valve Stem Seal
Cummins®

The Cummins 4976170 Valve Stem Seal is a component designed for use in heavy-duty truck engines. Its purpose is to ensure the proper functioning of the valve system within the engine. This seal plays a role in maintaining the efficiency and performance of the engine by preventing oil leakage past the valve stem ¹.

Basic Concepts of Valve Stem Seals

A valve stem seal is a small but vital component in an engine’s valve train. Its primary function is to contain oil within the valve guide and prevent it from entering the combustion chamber. This containment is essential for maintaining the lubrication of moving parts while ensuring that oil does not contaminate the air-fuel mixture, which could lead to inefficient combustion and increased emissions ². The valve stem seal contributes to the overall performance and efficiency of the engine by ensuring that the valve operates smoothly and that oil consumption is minimized.

Purpose of the Cummins 4976170 Valve Stem Seal

The Cummins 4976170 Valve Stem Seal is specifically engineered to maintain proper valve operation and engine efficiency in heavy-duty truck applications. It plays a role in the valve system by sealing the gap between the valve stem and the valve guide. This seal prevents oil from leaking into the combustion chamber, which helps in maintaining the correct lubrication levels for the valve stem and reduces oil consumption. Additionally, it contributes to the engine’s overall performance by ensuring that the valve operates within its designed parameters, thus supporting efficient combustion and reducing wear on engine components ³.

Key Features

The Cummins 4976170 Valve Stem Seal is characterized by its robust design and the materials used in its construction. It is made from high-quality materials that offer durability and resistance to the high temperatures and pressures found within an engine. The seal’s design includes features that enhance its performance, such as a precise fit to the valve stem and valve guide, which ensures effective sealing. These characteristics contribute to the seal’s ability to withstand the demanding conditions of heavy-duty truck engines, providing reliable performance over time.

Benefits

The use of the Cummins 4976170 Valve Stem Seal offers several benefits. It contributes to improved engine performance by ensuring that the valve system operates efficiently. This efficiency can lead to increased fuel efficiency, as the engine requires less effort to operate under optimal conditions. Additionally, the seal helps in reducing maintenance requirements by minimizing oil leakage and wear on engine components, which can extend the intervals between service checks and reduce the overall cost of ownership for heavy-duty trucks.

Installation and Maintenance

Proper installation of the Cummins 4976170 Valve Stem Seal is crucial for its effectiveness. It is recommended to follow manufacturer guidelines for installation procedures and to use the appropriate tools to ensure a correct fit. Maintenance of the seal involves regular inspection for signs of wear or damage and replacing it as necessary to prevent oil leakage and ensure continued engine efficiency. Adhering to these guidelines can help in maintaining the longevity and effectiveness of the seal.

Troubleshooting Common Issues

Common problems associated with valve stem seals include oil leaks and wear. These issues can often be identified through symptoms such as increased oil consumption or visible oil residue around the valve covers. Troubleshooting steps may involve inspecting the seal for damage, checking the fit of the valve stem within the guide, and ensuring that the engine’s lubrication system is functioning correctly. Addressing these issues promptly can help in maintaining the engine’s performance and efficiency.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for quality and innovation in the automotive and heavy-duty truck industry. The company’s commitment to manufacturing high-quality engine components, including the Cummins 4976170 Valve Stem Seal, underscores its dedication to providing reliable and efficient solutions for its customers.

Valve Stem Seal 4976170 Compatibility with Cummins Engines

The Valve Stem Seal part number 4976170, manufactured by Cummins, is designed to fit a variety of Cummins engines. This seal is crucial for maintaining the integrity of the engine by preventing oil from leaking past the valve stems. Below is a detailed description of the engines with which this part is compatible:

Compatible Engines

• F2.8 CM2620 F135B
• ISF2.8 CM2220 F117
• ISF2.8 CM2220 F129
• QSF2.8 CM2880 F104
• QSF2.8 CM2880 F105
• QSF2.8 CM2880 F108
• QSF2.8 CM2880 F114
• R2.8 CM2220 R101B

Grouping of Compatible Engines

The engines listed can be grouped based on their model series and common characteristics:

1. F2.8 Series

   • F2.8 CM2620 F135B

2. ISF2.8 Series

   • ISF2.8 CM2220 F117
   • ISF2.8 CM2220 F129

3. QSF2.8 Series

   • QSF2.8 CM2880 F104
   • QSF2.8 CM2880 F105
   • QSF2.8 CM2880 F108
   • QSF2.8 CM2880 F114

4. R2.8 Series

   • R2.8 CM2220 R101B

Each of these engines, despite their different model numbers and specifications, share a commonality in their design that allows the Valve Stem Seal 4976170 to fit seamlessly. This compatibility ensures that the seal can effectively perform its function across a range of engine types, providing a reliable solution for maintaining engine performance and longevity.

Role of Part 4976170 Valve Stem Seal in Engine Systems

The 4976170 Valve Stem Seal is a component in maintaining the efficiency and performance of various engine systems. It is strategically positioned within the cylinder head, where it interfaces with both the intake and exhaust valve kits.

When the engine operates, the Valve Stem Seal ensures a tight seal between the valve stem and the cylinder head. This seal is vital for preventing oil from leaking into the combustion chamber, which could otherwise lead to oil consumption and reduced engine performance.

In the context of an upper engine gasket kit, the Valve Stem Seal works in conjunction with other gaskets to maintain the integrity of the engine’s upper components. It helps in preserving the correct pressure and temperature conditions necessary for optimal engine operation.

Furthermore, the seal plays a role in the overall performance of the injector system. By ensuring that the valve stem remains lubricated without excess oil leakage, the seal contributes to the smooth operation of the injector, thereby enhancing fuel delivery efficiency.

Conclusion

In summary, the 4976170 Valve Stem Seal is a key component that supports the functionality of the cylinder head, intake and exhaust valve kits, and the upper engine gasket kit, all of which are integral to the engine’s performance and longevity. Its role in preventing oil leakage, maintaining lubrication, and ensuring efficient combustion makes it a critical part of heavy-duty truck engine maintenance and operation.