4939110
Cylinder Head
Cummins®

The 4939110 Cylinder Head Assembly, manufactured by Cummins, is a critical component in heavy-duty truck engines, contributing to their performance and efficiency. Cummins is renowned in the automotive industry for producing high-quality engine components.

Basic Concepts of Cylinder Head Assembly

A Cylinder Head Assembly is an essential part of an engine, positioned atop the cylinder block. It plays a role in the engine’s combustion process by housing the valves, fuel injectors, and spark plugs (in gasoline engines). Sealed to the cylinder block with a gasket, it facilitates the intake and exhaust of gases, contributing to the engine’s power output and efficiency. It also maintains the compression within the cylinders, which is vital for the combustion process ¹.

Purpose of the 4939110 Cylinder Head Assembly

This Cummins part is designed to enhance the operation of truck engines. It contributes to engine efficiency by ensuring optimal combustion, which in turn affects power output and overall performance. The assembly is engineered to withstand the high pressures and temperatures within the engine, ensuring reliable operation under demanding conditions ².

Key Features

The 4939110 incorporates several key features that enhance its performance and durability. It is constructed from high-quality materials that can withstand the rigors of heavy-duty truck engines. The design includes advanced technological elements that improve combustion efficiency and reduce emissions. Additionally, the assembly is engineered to precise specifications to ensure a proper fit and function within the engine ³.

Benefits

Using the 4939110 in truck engines offers several benefits. It contributes to improved engine performance through efficient combustion and reduced emissions. The assembly’s durable construction ensures long-term reliability, reducing the need for frequent replacements. Additionally, its precise engineering enhances the overall efficiency and power output of the engine.

Installation Process

Installing the 4939110 requires careful attention to detail to ensure proper fit and function. The process involves removing the old assembly, inspecting the cylinder block for any damage, and installing the new assembly with the correct torque specifications. It is important to use a new gasket and to ensure that all components, such as valves and fuel injectors, are properly seated and aligned.

Common Issues and Troubleshooting

Common issues with the 4939110 may include leaks, misfires, or reduced engine performance. These issues can often be traced to improper installation, wear and tear, or damage to the assembly. Troubleshooting involves inspecting the assembly for any visible damage, checking the torque specifications, and ensuring that all components are properly seated and aligned. In some cases, replacement of the assembly may be necessary.

Maintenance Tips

To ensure optimal performance and longevity of the 4939110, regular maintenance is recommended. This includes inspecting the assembly for any signs of wear or damage, cleaning the components to remove any buildup, and replacing the gasket during reinstallation. Adhering to the manufacturer’s recommended maintenance schedule will help to ensure the assembly continues to function efficiently.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong reputation in the automotive industry, Cummins is committed to manufacturing high-quality engine components that meet the demanding requirements of heavy-duty applications. The company’s focus on innovation and quality has established it as a trusted name in the industry.

Cummins Cylinder Head Assembly Part 4939110 Compatibility

The Cummins Cylinder Head Assembly part number 4939110 is designed to fit a variety of Cummins engines, ensuring compatibility across different models. Here is a detailed look at the engines with which this part is compatible:

ISC CM2150 and ISL CM2150

The Cummins ISC CM2150 and ISL CM2150 engines are part of the Cummins ISC/ISL family, known for their robust performance and reliability. This part is specifically engineered to fit these engines, providing a seamless integration that maintains the engine’s efficiency and power output.

ISL9 CM2150 SN

The ISL9 CM2150 SN engine is another variant within the Cummins ISL series. This engine is designed for heavy-duty applications and benefits from the precision engineering of the 4939110. The compatibility ensures that the engine operates smoothly, with optimal combustion and performance characteristics.

QSC8.3 CM850 (CM2850) and QSL9 CM850 (CM2850)

The Cummins QSC8.3 CM850 (CM2850) and QSL9 CM850 (CM2850) engines are part of the Cummins Quantum Series. These engines are engineered for medium-duty applications, offering a balance of power and efficiency. The 4939110 is designed to fit these engines, ensuring that they perform at their best with reliable and consistent operation.

ISC CM850

The Cummins ISC CM850 engine is another member of the ISC family, known for its versatility and performance. The 4939110 is compatible with this engine, providing the necessary components to maintain the engine’s performance and longevity.

By ensuring compatibility with these engines, the 4939110 offers a reliable and efficient solution for maintaining and repairing these critical components.

Integration of Part 4939110 Cylinder Head Assembly in Engine Systems

The 4939110 is a fundamental component in the orchestration of an engine’s performance. It is meticulously designed to interface with various engine systems to optimize the combustion process and enhance overall engine efficiency.

Combustion Chamber and Valve Train Interaction

The Cylinder Head Assembly houses the combustion chamber, where the air-fuel mixture is ignited. It is intricately connected to the valve train, which includes components such as the camshaft, valve springs, and rocker arms. This assembly ensures precise timing and control of the intake and exhaust valves, allowing for optimal air-fuel mixture intake and exhaust gas evacuation.

Fuel Injection System Compatibility

In engines equipped with fuel injection systems, the Cylinder Head Assembly is engineered to accommodate fuel injectors. It provides the necessary mounting points and passages for fuel delivery directly into the combustion chamber, ensuring a fine mist of fuel is atomized for efficient combustion.

Ignition System Integration

For engines utilizing spark ignition, the Cylinder Head Assembly includes provisions for spark plugs. These are strategically placed within the combustion chamber to ignite the air-fuel mixture at the precise moment for optimal combustion efficiency and power output.

Cooling System Interface

The assembly is also designed to interface with the engine’s cooling system. It incorporates coolant passages that surround the combustion chamber and valves, dissipating heat away from these high-temperature areas to maintain engine integrity and performance.

Emission Control System Connection

In modern engines, the Cylinder Head Assembly is integral to the emission control system. It often includes ports for Exhaust Gas Recirculation (EGR) valves and may have provisions for catalytic converter integration, aiding in the reduction of harmful emissions.

Structural and Sealing Functions

Beyond its role in combustion, the Cylinder Head Assembly serves a structural purpose, sealing the top of the engine block. It is bolted onto the engine block, creating a hermetic seal that prevents the escape of combustion gases and ensures the integrity of the engine’s internal pressure.

Conclusion

In summary, the 4939110 is a multifaceted component that plays a significant role in the engine’s operation. Its design and integration with various engine systems are paramount to achieving efficient combustion, reliable performance, and compliance with emission standards.