3629168
Expansion Plug
Cummins®

Introduction

The Cummins 3629168 Expansion Plug is a critical component designed for use in commercial trucks. Its primary function is to seal openings in the engine block or other parts of the cooling system, ensuring that coolant remains within the system and preventing leaks that could lead to engine overheating and potential damage ¹.

Basic Concepts of Expansion Plugs

An expansion plug is a sealing device used in automotive applications to close off openings in various components. These plugs are typically made from materials that can expand when heated, creating a tight seal. They are commonly used in engine blocks, radiators, and other parts of the cooling system to prevent fluid loss and maintain system integrity ².

Role of the 3629168 Expansion Plug in Truck Operation

The Cummins 3629168 Expansion Plug plays a crucial role in the operation of a truck by sealing openings in the engine block or cooling system. Its proper placement ensures that coolant is retained within the system, allowing for efficient heat dissipation and engine cooling. Without a functioning expansion plug, coolant could leak, leading to reduced cooling efficiency and potential engine damage ³.

Key Features

The Cummins 3629168 Expansion Plug is characterized by several key features that enhance its performance. It is made from high-quality materials that can withstand the high temperatures and pressures found within an engine. The design of the plug allows it to expand when heated, creating a secure seal. Additionally, it is engineered to be easy to install and remove, facilitating maintenance and repair processes.

Benefits

The use of the Cummins 3629168 Expansion Plug offers several benefits. It contributes to improved engine performance by ensuring that the cooling system operates efficiently. The plug’s durable construction and reliable sealing capabilities enhance the longevity of the engine and cooling system components. Furthermore, its design allows for consistent performance across a range of operating conditions, providing reliability in both standard and demanding environments.

Troubleshooting and Maintenance

Common issues associated with expansion plugs include leaks due to wear, corrosion, or improper installation. To troubleshoot these problems, it is important to inspect the plug and surrounding areas for signs of damage or deterioration. Regular maintenance, such as checking the condition of the plug during routine engine inspections, can help ensure its effectiveness. If a plug is found to be faulty, it should be replaced promptly to maintain the integrity of the cooling system.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and related technologies. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable, high-performance products. The company’s extensive product range and commitment to innovation have made it a preferred choice for commercial vehicle operators worldwide.

Compatibility of Cummins Expansion Plug Part 3629168 with Various Engine Models

The Cummins Expansion Plug part number 3629168 is designed to fit a variety of engine models, ensuring compatibility across different engine series. This plug is essential for maintaining the integrity of the engine’s cooling system by preventing leaks and ensuring proper sealing.

Compatible Engine Models

• GTA38 G CMEICS G116C, K38, K50, KTA38GC CM558
• QSK38 CM2150 MCRS, QSK38 CM850 MCRS
• QSK45 CM500, QSK60 CM500, QSK78 CM500
• QSK50 CM2150 K107, QSK50 CM2150 MCRS, QSK50 CM2350 K108
• QSK60 CM850 MCRS, QSK60 G CM2358 K110, QSK60G
• QSK95 CM2350 K111, QSK95 CM2350 K113

Role of Part 3629168 Expansion Plug in Engine Systems

The Expansion Plug, identified by part number 3629168, is integral to maintaining the structural integrity and operational efficiency of various engine components. Its primary function is to seal and secure different assemblies and parts within the engine system, ensuring optimal performance and longevity.

Integration with Cylinder Block and Related Assemblies

In the cylinder block and cylinder block kit, the Expansion Plug plays a significant role in sealing any unused or unnecessary passages. This ensures that the block maintains its structural integrity and prevents any unwanted fluid or gas leaks that could compromise engine performance. Similarly, in the cylinder block hardware kit and cylinder short block, the plug is used to seal off coolant or oil passages that are not in use, thereby maintaining the efficiency of the cooling and lubrication systems.

Application in Short Block and Long Block Assemblies

For the short block assembly and short block assy - K50, the Expansion Plug is essential in sealing off any non-functional ports or passages. This is particularly important in the short block assembly - 50 where precise sealing is required to ensure that the block operates within specified parameters. In the long block assy. - 50, the plug helps in maintaining the integrity of the assembly by preventing any fluid leakage that could affect the overall performance of the engine.

Use in Turbocharger and Exhaust Manifold

In the turbocharger arrangement, the Expansion Plug is used to seal off any bypass or relief ports that are not in use. This ensures that the turbocharger operates efficiently without any unwanted pressure leaks. In the exhaust manifold assembly, the plug seals off any unused passages, ensuring that exhaust gases are directed properly and efficiently out of the engine.

Role in Gear Housing and Base Parts

Within the gear housing, the Expansion Plug is used to seal off any non-functional oil passages, ensuring that the lubrication system remains efficient and effective. In the base parts and parts base, the plug is utilized to seal any unnecessary openings, thereby maintaining the structural integrity and operational efficiency of these components.

Importance in Manifold and Starting Motor

In the manifold, particularly the exhaust manifold, the Expansion Plug ensures that exhaust gases are directed correctly without any leaks. For the starting motor, the plug is used to seal off any non-functional passages, ensuring that the motor operates efficiently and reliably.

Application in Crankshaft and Bearings

In the crankshaft and bearings assembly, the Expansion Plug is used to seal off any unused oil passages, ensuring that the lubrication system functions optimally. This is vital for the longevity and performance of the crankshaft and its associated bearings.

Use in Lower Block Gasket Set and Main Bearings

The lower block gasket set and main bearings benefit from the Expansion Plug by ensuring that any non-functional passages are sealed, thereby maintaining the integrity of the gasket set and the efficiency of the main bearings.

Function in Service Block Kit

In the service block kit, the Expansion Plug is used to seal off any passages that are not required during the service or repair process. This ensures that the kit can be used effectively without any risk of fluid or gas leaks.

Conclusion

The Cummins 3629168 Expansion Plug is a versatile and essential component that enhances the functionality and reliability of various engine systems by ensuring proper sealing and structural integrity. Its compatibility with a wide range of engine models and its critical role in maintaining the efficiency of the cooling and lubrication systems make it a vital part of commercial truck engines.