3004258
Expansion Plug
Cummins®

Introduction

The Cummins 3004258 Expansion Plug is a component designed for use in heavy-duty truck maintenance and operation. It serves a specific function within the truck’s system, contributing to the overall efficiency and reliability of the vehicle. Understanding its purpose and significance is key to maintaining the optimal performance of heavy-duty trucks.

Basic Concepts of Expansion Plugs

An expansion plug is a device used in automotive and heavy-duty truck systems to seal openings in various components. It functions by expanding within the cavity it is inserted into, creating a tight seal that prevents fluid leakage and maintains system integrity. These plugs are commonly used in engine and cooling systems, among other applications, to ensure that the system operates under the correct pressure and temperature conditions ¹.

Purpose of the 3004258 Expansion Plug

The 3004258 Expansion Plug plays a role in the operation of a truck by sealing specific openings within the engine or cooling system. Its function is to maintain the system’s pressure and prevent the escape of fluids, which is vital for the efficient operation of the truck. By ensuring a secure seal, it contributes to the overall performance and longevity of the truck’s engine and cooling components ².

Key Features

The 3004258 Expansion Plug is characterized by its material composition, which is designed to withstand the high temperatures and pressures within the engine and cooling system. Its design includes elements that allow it to expand securely within the cavity, ensuring a durable and reliable seal. These features enhance its performance and contribute to its longevity ³.

Benefits

Using the 3004258 Expansion Plug offers several benefits, including improved system integrity through secure sealing, enhanced performance of the engine and cooling system due to maintained pressure and temperature conditions, and increased longevity of the components it protects by preventing fluid leakage and contamination.

Installation Process

Installing the 3004258 Expansion Plug requires careful attention to ensure a correct fit. The process involves selecting the appropriate size plug for the cavity, inserting it until it reaches the bottom, and then expanding it to create a seal. Tools such as a hammer may be required for proper installation. Following best practices ensures the plug functions as intended, contributing to the system’s efficiency and reliability.

Troubleshooting Common Issues

Common issues with expansion plugs, such as leaks or failure, can arise due to improper installation, wear, or damage. Troubleshooting these problems involves inspecting the plug for signs of wear or damage, ensuring it is correctly installed, and replacing it if necessary. Addressing these issues promptly helps maintain the system’s integrity and performance.

Maintenance Tips

Regular maintenance of the 3004258 Expansion Plug includes periodic inspection for signs of wear or damage and ensuring it remains securely in place. Replacement may be necessary if the plug shows signs of deterioration or if it fails to create a secure seal. Adhering to these maintenance practices contributes to the longevity and reliability of the truck’s engine and cooling system.

Compatibility of Cummins Expansion Plug 3004258 with Various Engine Models

The Cummins Expansion Plug 3004258 is designed to fit a wide range of Cummins engine models, ensuring compatibility across multiple series and configurations. This part is crucial for maintaining the integrity of the engine’s cooling system by preventing leaks and ensuring proper sealing.

6C8.3 and G8.3 Series

The 6C8.3 and G8.3 engines, including variants like G8.3 CM558 and GTA8.3 CM558, are part of the 6-cylinder engine family. The 3004258 expansion plug is engineered to fit seamlessly into these engines, providing a reliable seal that is essential for maintaining optimal engine performance.

B6.7 and L8.9 Series

The B6.7 CM2670 B153B and L8.9 engines, including configurations such as L8.9 CM2670 L134C and L8.9G CMOH2.0 L125B, are among the most popular in the Cummins lineup. The 3004258 expansion plug is compatible with these engines, ensuring that the cooling system remains leak-free and efficient.

L9 Series

Engines in the L9 series, such as L9 CM2670 L128B, L9.3 L105, and L9.5 L117, also benefit from the 3004258 expansion plug. This part is designed to fit these engines perfectly, providing the necessary sealing to prevent coolant leaks and maintain system pressure.

ISC and ISL Series

The ISC and ISL series engines, including models like ISC CM2150, ISC CM554, ISC CM850, ISC8.3 CM2250, ISL CM2150, ISL CM554, ISL G CM2180, ISL9 CM2150 SN, ISL9 CM2250, and ISL9.5 CM2880 L138, are designed for heavy-duty applications. The 3004258 expansion plug is compatible with these engines, ensuring that they can handle the rigors of demanding environments while maintaining a reliable seal.

C GAS PLUS and L GAS PLUS

The C GAS PLUS CM556 and L GAS PLUS CM556 engines, which are designed for natural gas operation, also require the 3004258 expansion plug. This part ensures that these engines can operate efficiently and safely, with a reliable seal that prevents leaks and maintains system integrity.

By ensuring compatibility with these diverse engine models, the Cummins Expansion Plug 3004258 provides a versatile solution for maintaining the cooling systems of various Cummins engines.

Role of Part 3004258 Expansion Plug in Engine Systems

The part 3004258 Expansion Plug is an essential component in various engine systems, facilitating the sealing and protection of specific areas within the engine. Its application spans across multiple engine configurations and repair scenarios, ensuring the integrity and efficiency of the engine’s operation.

In the context of a Block Kit or Cylinder Block Kit, the Expansion Plug is utilized to seal off unused or non-functional passages within the cylinder block. This prevents coolant or oil from leaking into areas where it could cause damage or reduce engine performance.

For the Engine Block and Cylinder Block, the Expansion Plug plays a significant role in maintaining the structural integrity of these components. By sealing off unnecessary holes or passages, it ensures that the block remains airtight, which is vital for the proper functioning of the engine.

In a Short Block or Short Block 6C, the Expansion Plug is employed to close off coolant or oil passages that are not in use. This is particularly important in engines where certain configurations or modifications require the sealing of specific pathways to maintain optimal performance and prevent fluid leakage.

When dealing with a Long Block or Lower Engine Gasket Kit, the Expansion Plug ensures that all passages are correctly sealed, contributing to the overall reliability and efficiency of the engine. It is also used in Overhaul Kits and Repair Kits to restore the engine to its original condition by sealing off any passages that were previously opened or modified.

In the Service Kit and Short Engine Kit, the Expansion Plug is a key component in ensuring that the engine is prepared for service or repair. It helps in maintaining the engine’s structural integrity by sealing off any unnecessary passages, thus preventing potential leaks and ensuring the engine operates efficiently.

Overall, the part 3004258 Expansion Plug is a versatile and vital component in various engine systems, providing essential sealing and protection across a wide range of engine configurations and repair scenarios.

Conclusion

The Cummins 3004258 Expansion Plug is a critical component in maintaining the efficiency and reliability of heavy-duty trucks. Its role in sealing various engine and cooling system passages ensures that the system operates under the correct pressure and temperature conditions, contributing to the overall performance and longevity of the vehicle. Understanding its purpose, features, and benefits, as well as following proper installation and maintenance practices, is essential for ensuring the optimal operation of heavy-duty trucks.