3920867
Intake Valve
Cummins®

The Cummins 3920867 Intake Valve is a component designed for use in commercial truck engines. Its purpose is to regulate the flow of air into the engine’s combustion chamber. This valve plays a role in the engine’s air intake process, which is fundamental to the operation of internal combustion engines. By controlling the timing and amount of air entering the engine, the intake valve contributes to the efficiency of the combustion process and the overall performance of the engine ¹.

Basic Concepts of Intake Valves

An intake valve is one of the key components within an internal combustion engine. It functions by opening to allow air, and often a mixture of air and fuel, to enter the combustion chamber. The significance of the intake valve in the engine’s operation lies in its ability to control the air supply, which is necessary for the combustion of fuel. This process generates the power that drives the engine and, consequently, the vehicle ².

Role of the 3920867 Intake Valve in Truck Operation

The Cummins 3920867 Intake Valve plays a specific role in the engine’s air intake process. It is designed to open and close at precise moments in the engine’s cycle, allowing for an optimal amount of air to mix with fuel in the combustion chamber. This contributes to combustion efficiency and enhances overall engine performance. The valve’s operation is synchronized with the engine’s camshaft, ensuring that air intake occurs at the correct phase of the engine cycle ³.

Key Features

The Cummins 3920867 Intake Valve is characterized by several key features that enhance its functionality and durability. It is constructed from high-quality materials that are resistant to the high temperatures and pressures within the engine. The design of the valve includes precise machining to ensure a tight seal when closed, preventing air leaks that could reduce engine efficiency. Additionally, the valve may feature coatings or treatments that reduce friction and wear, contributing to its longevity in demanding commercial truck applications ⁴.

Benefits

Using the Cummins 3920867 Intake Valve is associated with several benefits. These include improved engine performance due to more efficient air intake, increased fuel efficiency as a result of better combustion, and enhanced reliability in the harsh operating conditions typical of commercial truck use. The valve’s design and material composition contribute to these advantages, making it a valuable component for maintaining engine health and performance ⁵.

Troubleshooting and Maintenance

Common issues that may arise with intake valves include sticking, due to carbon buildup, and wear on the valve face or seat. Regular maintenance practices, such as cleaning the intake system and inspecting the valve for signs of wear, can help ensure optimal performance. Troubleshooting tips for addressing potential problems with the Cummins 3920867 Intake Valve may involve checking for proper valve operation, ensuring the valve seals correctly, and addressing any signs of damage or excessive wear promptly .

Cummins Engine Compatibility with Intake Valve Part 3920867

The Cummins part 3920867, an Intake Valve, is designed to fit into a variety of Cummins engines, ensuring optimal performance and reliability. Below is a detailed overview of the compatibility of this part with specific engine models:

Cummins 4B3.9 and QSB3.9 30 CM550 Engines

The Intake Valve part 3920867 is compatible with the Cummins 4B3.9 and QSB3.9 30 CM550 engines. These engines are known for their robust performance and are often used in various industrial and agricultural applications. The part is engineered to fit seamlessly into these engines, ensuring efficient air intake and contributing to the overall engine efficiency.

Cummins 6B5.9 and QSB5.9 30 CM550 Engines

Similarly, the Intake Valve part 3920867 is also compatible with the Cummins 6B5.9 and QSB5.9 30 CM550 engines. These engines are part of the Cummins QSB series, which is renowned for its durability and power. The part’s design ensures that it fits perfectly within these engines, facilitating smooth operation and maintaining the engine’s performance standards.

Cummins 6C8.3 Engine

The Intake Valve part 3920867 is also suitable for the Cummins 6C8.3 engine. This engine is part of the Cummins C-Series, known for its versatility and efficiency. The part’s compatibility with the 6C8.3 engine ensures that it can handle the specific demands of this model, providing reliable performance and longevity.

Cummins B4.5 and B6.7S Engines

The Intake Valve part 3920867 is also designed to fit the Cummins B4.5 and B6.7S engines. These engines are part of the Cummins B-Series, which is widely used in various applications due to its reliability and performance. The part’s design ensures it can integrate smoothly with these engines, contributing to their overall efficiency and operational effectiveness.

Cummins ISBE CM800 Engine

Lastly, the Intake Valve part 3920867 is compatible with the Cummins ISBE CM800 engine. This engine is part of the Cummins ISBE series, known for its high power output and efficiency. The part’s compatibility with the ISBE CM800 ensures it can meet the stringent demands of this engine model, providing reliable performance and maintaining the engine’s operational standards.

Role of Part 3920867 Intake Valve in Engine Systems

The intake valve, specifically part 3920867, is integral to the operation of various engine components. When installed in the cylinder head, it facilitates the intake of air-fuel mixture into the combustion chamber. This process is essential for the engine’s operation, as it directly influences the efficiency and performance of the engine.

In the context of a cylinder head kit or a cylinder head repair kit, the intake valve works in conjunction with other components to ensure optimal engine function. The valve’s precise fit and operation are vital for maintaining the correct air-fuel ratio, which is monitored and adjusted by the engine control module.

The intake valve also interacts with the fuel supply tube, ensuring that the fuel is properly atomized and mixed with air before combustion. This interaction is particularly important in high-performance engines where precise fuel delivery is necessary for maximum efficiency and power output.

When considering the head or NEF cylinder, the intake valve’s role becomes even more pronounced. It must withstand high temperatures and pressures, making its material and design critical for durability and performance.

In a long block or overhaul kit, the intake valve is often included to ensure that the engine maintains its intended performance specifications post-overhaul. Its condition and functionality are checked during the overhaul process to guarantee that the engine will operate smoothly once reassembled.

For performance parts and valve kits, the intake valve is often upgraded to enhance engine performance. These upgrades can include materials that offer better heat resistance or designs that improve airflow, directly contributing to increased engine efficiency and power.

Overall, the intake valve is a key component in the intricate dance of engine operation, working seamlessly with various other parts to ensure the engine runs efficiently and effectively.

Conclusion

The Cummins 3920867 Intake Valve is a critical component in the operation of commercial truck engines, contributing to efficient air intake, improved engine performance, and enhanced reliability. Its compatibility with a range of Cummins engines underscores its versatility and importance in maintaining engine health and performance. Regular maintenance and proper troubleshooting are essential to ensure the valve operates effectively, thereby supporting the overall efficiency and longevity of the engine.