3939258
Cover Plate Gasket

10 Pack

Cummins®

The 3939258 Cover Plate Gasket, manufactured by Cummins, is a critical component in the automotive industry, especially for commercial trucks. This gasket ensures the integrity of engine components by providing a reliable seal, which is essential for maintaining the operational efficiency of truck engines.

Basic Concepts of Cover Plate Gaskets

A cover plate gasket serves as a sealing component between two or more mating surfaces to prevent the leakage of fluids or gases. It fills the microscopic irregularities on the surfaces, creating a barrier that maintains the separation of different engine compartments. Materials commonly used in gasket manufacturing include rubber, cork, paper, and various composites, each offering distinct properties such as flexibility, heat resistance, and chemical stability ¹.

Role of the 3939258 Cover Plate Gasket in Truck Operation

The 3939258 Cover Plate Gasket is vital for sealing engine components, preventing leaks, and maintaining engine efficiency. It is positioned to cover and seal critical areas within the engine, ensuring that fluids and gases remain within their designated pathways. This sealing action is fundamental to the engine’s performance, as it helps maintain pressure and prevent contamination between different engine sections ².

Key Features

The 3939258 Cover Plate Gasket is characterized by its precise design and material composition, which includes a blend of materials chosen for their durability and sealing capabilities. Its unique attributes enhance performance and longevity, ensuring it can withstand the harsh conditions within a truck engine. The gasket’s design allows for a snug fit in its designated area, contributing to its effectiveness in sealing ³.

Benefits

Utilizing the 3939258 Cover Plate Gasket offers several advantages, including improved engine performance through effective sealing, reduced risk of leaks that could lead to engine damage, and enhanced durability under the demanding conditions of truck operation. These benefits contribute to the overall efficiency and reliability of the truck, ensuring smoother operation and potentially extending the engine’s lifespan ⁴.

Troubleshooting and Maintenance

To maintain the 3939258 Cover Plate Gasket in optimal condition, regular inspection is recommended. Signs of wear or damage should be addressed promptly to prevent leaks and ensure continued engine efficiency. Replacement procedures should follow manufacturer guidelines to ensure proper fit and function. Troubleshooting common issues may involve checking for proper seating, inspecting for damage, and ensuring no foreign materials are present that could compromise the seal.

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 of innovation and a commitment to quality, Cummins has established a reputation for producing reliable and high-performance automotive components. Their dedication to advancing technology and improving product quality underscores their position as a leader in the manufacturing of truck parts.

Cummins Cover Plate Gasket 3939258 Compatibility

The Cummins Cover Plate Gasket part number 3939258 is designed to fit a variety of Cummins engines, ensuring a secure seal between engine components. Here is a detailed breakdown of its compatibility across different engine models:

4B3.9 and 6B5.9 Engines

The 3939258 gasket is compatible with the 4B3.9 and 6B5.9 engines, providing a reliable seal that prevents leaks and maintains engine efficiency.

B3.9 G, B4.5, and B4.5 RGT Engines

This gasket fits the B3.9 G, B4.5, and B4.5 RGT engines, ensuring that these models maintain optimal performance by preventing any unwanted fluid leakage.

B5.6 CM2670 B152B and B5.9 CM2670 B166C Engines

The 3939258 gasket is also suitable for the B5.6 CM2670 B152B and B5.9 CM2670 B166C engines, providing a critical seal that is essential for the proper functioning of these engines.

B5.9 G and B5.9 GAS PLUS CM556 Engines

For the B5.9 G and B5.9 GAS PLUS CM556 engines, the 3939258 gasket ensures a tight seal, which is crucial for maintaining engine integrity and performance.

B6.7 Series Engines

The gasket is compatible with several B6.7 series engines, including:

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• B6.7S

G Series Engines

The 3939258 gasket fits the following G series engines:

• G5.9
• G5.9 CM558
• G8.3
• G8.3 CM558
• GTA8.3 CM558

C GAS PLUS CM556 Engine

The gasket is also compatible with the C GAS PLUS CM556 engine, ensuring a secure seal for this specific model.

ISB Series Engines

The 3939258 gasket is suitable for the following ISB series engines:

• ISB (Chrysler)
• ISB CM2150
• ISB CM850

This gasket is engineered to provide a precise fit for these engines, ensuring that they operate efficiently and reliably.

Role of Part 3939258 Cover Plate Gasket in Engine Systems

The 3939258 Cover Plate Gasket is integral to ensuring the efficient and reliable operation of various engine systems. It serves as a seal between the cover plate and the engine block, preventing leaks and maintaining system integrity.

Fuel System Integration

In the context of the Bosch Fuel Pump Kit and the Fuel Injection Pump, the Cover Plate Gasket ensures that there are no fuel leaks from the high-pressure areas. This is vital for maintaining fuel efficiency and preventing hazardous conditions. Additionally, when paired with the Fuel Pump Coupling and Fuel System Accessories, the gasket helps in sustaining the required pressure levels within the fuel lines.

Engine Kit and Overhaul Components

When incorporated into an Engine Kit or an Overhaul Kit, the Cover Plate Gasket plays a significant role in the rebuild process. It ensures that the Crankshaft and Bearings are properly sealed, which is essential for reducing friction and wear. The gasket also works in conjunction with the Lower Engine Gasket Kit and Upper Gasket Set to create a comprehensive sealing solution throughout the engine.

Maintenance and Accessibility

For components like the Access Hole Cover and Hand Hole Cover, the Cover Plate Gasket provides a secure seal that allows for easy maintenance without compromising the engine’s integrity. This is particularly important during routine checks or when replacing parts like the Fuel Filter or Lift Pump.

Comprehensive Gasket Solutions

In a Gasket Full Engine Set or a Gasket Kit, the Cover Plate Gasket is a key component that ensures all critical junctions are sealed. This is especially important in preventing oil leaks from the Oil Fill Arrangement and ensuring that the On Board Spares and Solenoid Kit function without interference from external contaminants.

Specialized Kits and Modules

For more specialized applications, such as the Fuel Control Module or Spare Kit, the Cover Plate Gasket ensures that all modular components are securely sealed. This is essential for the reliable operation of these subsystems, particularly in high-stress environments where even minor leaks can lead to significant issues.

Conclusion

In summary, the Cover Plate Gasket (part 3939258) is a fundamental component in various engine systems, providing essential sealing functions that contribute to the overall efficiency, safety, and reliability of the engine.