4939895
Valve Cover
Cummins®

The Cummins 4939895 Valve Cover is a component designed for heavy-duty truck engines, playing a significant role in the engine’s operation and protection. This part is engineered to meet the demanding requirements of heavy-duty applications, ensuring reliable performance and durability ¹.

Basic Concepts of Valve Covers

A valve cover is a protective enclosure that sits atop the cylinder head of an engine, covering the valve train components. Its primary functions include containing engine oil within the valve train area, preventing contaminants from entering the engine, and reducing noise from the valve train. Valve covers are typically made from materials such as aluminum, plastic, or composite materials, chosen for their strength, lightweight properties, and resistance to corrosion and heat ².

Purpose of the Cummins 4939895 Valve Cover

This Cummins part is designed to protect the valve train components within the engine. It plays a role in maintaining the integrity of the engine’s lubrication system by containing oil and preventing leaks. Additionally, it contributes to engine performance by ensuring that the valve train operates smoothly and efficiently, which is crucial for the overall functionality of the engine ³.

Key Features

The 4939895 features a robust design that includes precision-machined surfaces for a secure fit. It is constructed from high-quality materials that offer excellent resistance to wear and corrosion. Unique characteristics of this valve cover may include enhanced sealing mechanisms to prevent oil leaks and improved ventilation to reduce pressure buildup within the valve train area ⁴.

Benefits

Using the 4939895 offers several benefits, including improved engine protection due to its durable construction and precise fit. It contributes to enhanced engine performance by ensuring the valve train components are well-lubricated and protected from contaminants. The valve cover’s design also supports the longevity of the engine by reducing the risk of oil leaks and maintaining optimal operating conditions.

Installation Process

Installing this part involves several steps to ensure a proper fit and seal. The process typically requires the use of specific tools, such as torque wrenches, to secure the valve cover in place without over-tightening. Careful attention to the gasket’s condition and proper alignment of the valve cover are crucial for a successful installation.

Maintenance and Troubleshooting

Regular maintenance of the 4939895 includes inspecting the gasket for signs of wear or damage and ensuring that the valve cover is securely fastened. Common issues that may arise include oil leaks, which can often be addressed by replacing the gasket or tightening the valve cover bolts. Routine checks during engine maintenance can help identify and resolve potential problems before they lead to more significant issues.

Compatibility with Cummins Engines

The Valve Cover part number 4939895 is designed to fit a variety of Cummins engines, ensuring a secure and effective seal. This part is crucial for maintaining engine integrity and performance. Below is a detailed description of its compatibility with various Cummins engines:

B6.7 Series

• B6.7 CM2670
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)

The B6.7 series engines, including the B6.7 CM2670, ISB/ISD6.7 CM2150 SN, ISB6.7 CM2250, QSB6.7 CM2250, and QSB6.7 CM850 (CM2850), all utilize the Valve Cover 4939895. This part is engineered to fit these engines perfectly, ensuring optimal sealing and performance.

B5.9 Series

• ISB5.9 CM2880 B110
• QSB5.9 CM2880 B115

The B5.9 series engines, such as the ISB5.9 CM2880 B110 and QSB5.9 CM2880 B115, are also compatible with the Valve Cover 4939895. This part is designed to fit these engines, providing a reliable seal and contributing to the overall efficiency of the engine.

QSB7 Series

• QSB7 CM2880 B117

The QSB7 CM2880 B117 engine is another model that fits the Valve Cover 4939895. This part is specifically designed to ensure a proper seal and maintain the engine’s performance.

ISBE Series

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

The ISBE series engines, including the ISBE CM2150, ISBE CM800, and ISBE4 CM850, are also compatible with the Valve Cover 4939895. This part is engineered to fit these engines, ensuring a secure seal and contributing to the engine’s overall efficiency.

By ensuring compatibility with these various engine models, the Valve Cover 4939895 plays a crucial role in maintaining engine performance and integrity across different Cummins engine series.

Understanding the Role of Valve Cover 4939895 in Engine Systems

The 4939895 is an essential component in the arrangement of various engine systems. Its primary function is to encase and protect the valve train components, which include the valves, camshafts, and rocker arms.

When installed on a long block—which consists of the cylinder block, crankshaft, pistons, and other core components—the Valve Cover provides a sealed environment. This seal is vital for maintaining the integrity of the engine’s lubrication system, as it prevents oil leaks and contamination.

Additionally, the Valve Cover plays a role in managing the Positive Crankcase Ventilation (PCV) system. It allows for the controlled release of gases that build up in the crankcase, ensuring that these gases are routed back into the intake system rather than being released into the atmosphere.

In summary, the 4939895 is integral to the proper functioning and maintenance of the engine’s valve train and lubrication systems, contributing to the overall efficiency and longevity of the engine.

Conclusion

The Cummins 4939895 Valve Cover is a critical component for heavy-duty truck engines, offering protection, enhanced performance, and durability. Its robust design, precise fit, and compatibility with various Cummins engines make it an essential part for maintaining engine integrity and efficiency.