5263672
Expansion Plug
Cummins®

The Cummins 5263672 Expansion Plug is a critical component designed for commercial truck operations, ensuring secure seals in various applications within the truck’s engine or cooling system. This part is essential for maintaining system integrity, containing fluids and gases as intended ¹.

Basic Concepts of Expansion Plugs

An expansion plug, such as the 5263672, is a fastener that expands upon installation, creating a tight seal. This is achieved through a tapered design that, when driven into a hole, causes the plug to expand against the walls of the hole. This mechanism is widely used in automotive and industrial applications to seal openings, prevent leaks, and secure components ².

Role of the 5263672 Expansion Plug in Truck Operation

The Cummins 5263672 Expansion Plug is vital for sealing openings within the engine or cooling system. It is placed in locations requiring a secure seal to prevent fluid or gas escape. This could include sealing coolant passages, oil galleries, or other critical fluid pathways. By ensuring these pathways are sealed, the plug contributes to the efficient operation of the engine and the overall performance of the truck ³.

Key Features

The 5263672 Expansion Plug is characterized by several key features that enhance its performance. It is made from high-quality materials resistant to corrosion and high temperatures, ensuring durability in demanding environments. The plug’s tapered body expands upon installation, providing a secure and reliable seal. Additionally, it may feature a locking mechanism to prevent accidental removal or a special coating to improve sealing capabilities.

Benefits

The use of the 5263672 Expansion Plug offers several benefits. It contributes to improved engine performance by ensuring that fluid pathways are securely sealed, which helps maintain proper fluid levels and pressure within the system. The plug’s durable construction and reliable sealing capabilities enhance the overall durability of the engine or cooling system. Furthermore, its design ensures a tight seal, reducing the risk of leaks and improving the system’s efficiency.

Troubleshooting and Maintenance

Common issues associated with expansion plugs include leaks due to improper installation, corrosion, or damage to the plug. Troubleshooting these issues involves inspecting the plug for signs of wear or damage, ensuring it is properly installed, and replacing it if necessary. Maintenance practices for the 5263672 Expansion Plug include regular inspection during routine maintenance checks and replacement according to the manufacturer’s recommendations or if signs of wear or leakage are detected.

About Cummins

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 producing high-quality automotive components, including engines, powertrains, and aftermarket parts. The company’s commitment to innovation, quality, and customer satisfaction has made it a trusted name in the commercial truck industry.

Expansion Plug 5263672 by Cummins

The Cummins Expansion Plug part number 5263672 is designed to fit a variety of Cummins engines, providing a critical function in maintaining the integrity of the engine’s cooling system. This part is essential for sealing and preventing leaks in the engine block, ensuring optimal performance and longevity.

Compatible Engines

The 5263672 Expansion Plug is compatible with the following Cummins engines:

• 6B5.9
• 6C8.3
• B4.5 RGT
• B5.6 CM2670 B152B
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• D4.0 CM2620 D103B
• F3.8 CM2620 F137B
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C
• ISB (Chrysler)
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISBE CM2150

Application and Importance

The expansion plug is a crucial component in the engine’s cooling system, ensuring that the engine block remains sealed and that coolant does not leak out. This part is particularly important in maintaining the pressure and temperature within the engine, which is vital for the engine’s overall performance and durability.

Using the correct expansion plug for your specific engine model is essential to ensure compatibility and proper function. The 5263672 part number is designed to fit the listed engine models, providing a reliable and durable solution for sealing the engine block.

Role of Part 5263672 Expansion Plug in Engine Systems

The 5263672 Expansion Plug is an essential component in various engine systems, ensuring optimal performance and efficiency. Its primary function is to seal and secure different parts within the engine, preventing leaks and maintaining pressure integrity.

In the camshaft system, the expansion plug is used to seal the ends of the camshaft housing, ensuring that the timing and valve operation remain precise and unaffected by external contaminants.

Within the connecting rod and piston assembly, the expansion plug plays a role in sealing the rod bearings, which are critical for the smooth operation of the piston. This seal helps in maintaining the lubrication and preventing metal-to-metal contact that could lead to wear.

The cylinder head often utilizes expansion plugs to seal various passages and ports. These seals are vital for maintaining the integrity of the combustion chamber and ensuring that the pressure generated during the combustion process is contained effectively.

In the exhaust manifold, expansion plugs are employed to seal off unused ports or passages, which helps in directing the flow of exhaust gases efficiently and reducing the risk of leaks that could affect engine performance and emissions.

The fuel manifold system benefits from the use of expansion plugs to seal fuel passages, ensuring that fuel delivery is consistent and free from leaks, which is essential for maintaining the correct air-fuel mixture.

For the injector and injector plumbing, expansion plugs are used to seal the injector ports when they are not in use or during maintenance, preventing fuel leaks and ensuring that the fuel system remains pressurized.

In a long block or long block kit, expansion plugs are utilized in multiple locations to seal various components, ensuring that the assembled engine is ready for installation without any risk of fluid or gas leaks.

Performance parts often require precise sealing to achieve their intended enhancements. Expansion plugs are used in these applications to ensure that modifications, such as upgraded camshafts or cylinder heads, are sealed correctly, maintaining the performance gains.

The rocker lever and rocker lever shaft systems use expansion plugs to seal the pivot points and adjuster mechanisms, ensuring that the valvetrain operates smoothly and without leaks.

In turbocharger plumbing, expansion plugs are crucial for sealing the intake and exhaust sides of the turbocharger system, ensuring that boost pressure is maintained and that there are no leaks that could compromise turbocharger efficiency.

Overall, the 5263672 Expansion Plug is a versatile and reliable component that enhances the functionality and performance of various engine systems by providing essential seals and pressure maintenance.

Conclusion

The Cummins 5263672 Expansion Plug is a vital component in commercial truck operations, ensuring secure seals in the engine and cooling system. Its durable construction, reliable sealing capabilities, and versatile applications make it an essential part for maintaining engine performance and efficiency. Regular maintenance and proper installation are crucial for maximizing the benefits of this Cummins part.