4981332
Air Intake Manifold
Cummins®

The Cummins 4981332 Air Intake Manifold is a component designed for use in commercial trucks. It plays a role in the engine’s operation by facilitating the distribution of air to the cylinders, which is vital for combustion and overall engine performance.

Basic Concepts of Air Intake Manifolds

An air intake manifold is a part of an engine that distributes the air/fuel mixture into the cylinders. Its function is to ensure that each cylinder receives an equal amount of the mixture for combustion. The manifold operates by channeling the air from the air filter to the intake ports of the engine cylinders. The efficiency of the air intake system is crucial for the performance of internal combustion engines, as it directly affects the air-fuel ratio and, consequently, the engine’s power output and fuel efficiency ¹.

Purpose of the Cummins 4981332 Air Intake Manifold

This Cummins part is engineered to play a role in the engine’s operation by evenly distributing air to the cylinders. This distribution is key to maintaining consistent combustion across all cylinders, which in turn impacts engine performance, including power delivery and fuel economy.

Key Features

The 4981332 is constructed with high-quality materials to ensure durability and reliable performance. Its design includes features that enhance air flow efficiency, contributing to better engine performance. The manifold is built to withstand the rigors of commercial truck operation, with attention to detail in its construction to ensure it meets the demands of heavy-duty applications.

Benefits

Utilizing the 4981332 can lead to improved engine efficiency due to its design, which promotes optimal air distribution. The manifold’s durability ensures long-term reliability, and its efficient design may contribute to performance enhancements in the engine it serves.

Installation Considerations

When installing this part, it is important to follow guidelines to ensure compatibility with the specific engine model and to perform the installation correctly. This includes verifying fitment and following the manufacturer’s instructions for a secure and proper installation.

Troubleshooting Common Issues

Air intake manifolds can encounter issues such as leaks or blockages, which can affect engine performance. Troubleshooting these problems involves inspecting the manifold for signs of damage or wear, checking for proper seals, and ensuring that there are no obstructions in the air passages.

Maintenance Tips

Regular maintenance of the 4981332 is recommended to ensure optimal performance and longevity. This includes periodic cleaning to remove any buildup that could impede air flow, inspecting for damage or wear, and following the manufacturer’s guidelines for any necessary replacements.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a commitment to quality, Cummins serves commercial truck markets with a wide range of products designed to meet the needs of heavy-duty applications. The company’s reputation is built on its dedication to providing reliable and efficient power solutions.

Cummins Air Intake Manifold 4981332 Compatibility

The Air Intake Manifold part number 4981332 is designed to fit a variety of Cummins engines, ensuring optimal air flow and performance. Here are the specific engines it is compatible with:

B6.7 Series

• B6.7 CM2670
• QSB6.7 CM850 (CM2850)

These engines benefit from the manifold’s design, which enhances air intake efficiency, contributing to improved engine performance and fuel economy.

ISB/ISD6.7 Series

• ISB/ISD6.7 CM2150 SN

The 4981332 manifold is engineered to work seamlessly with the ISB/ISD6.7 CM2150 SN engine, providing a balanced air supply that supports the engine’s operational demands.

ISBE Series

• ISBE CM2150
• ISBE4 CM850

This manifold is also compatible with the ISBE CM2150 and ISBE4 CM850 engines. Its design ensures that these engines receive the necessary air for efficient combustion, enhancing overall performance.

QSB7 Series

• QSB7 CM2880 B117

The 4981332 manifold is suitable for the QSB7 CM2880 B117 engine, providing a robust air intake system that supports the engine’s high performance and durability requirements.

Role of Part 4981332 Air Intake Manifold in Engine Systems

The Air Intake Manifold, specifically part 4981332, is an integral component in the orchestration of engine performance. It serves as a conduit that evenly distributes the air-fuel mixture to the cylinders of an internal combustion engine. This part interfaces directly with the throttle body, which regulates the amount of air entering the system based on driver input.

Once air passes through the throttle body, it moves into the intake manifold where it is mixed with fuel injected by the fuel injectors. The design of the manifold ensures that this mixture is distributed uniformly across all cylinders, which is essential for balanced combustion and optimal engine performance.

The intake manifold also connects to the engine’s cylinder head, where the air-fuel mixture is drawn into the combustion chambers through the intake valves. The efficiency of this process is influenced by the manifold’s design, which may include features such as plenum chambers to smooth out airflow pulsations and ensure a steady supply of the mixture.

In turbocharged or supercharged engines, the intake manifold works in conjunction with the forced induction system. It receives pressurized air from the turbocharger or supercharger and channels it to the cylinders, enhancing the engine’s power output.

Furthermore, the intake manifold is often equipped with temperature sensors that provide feedback to the engine control unit (ECU). This data allows the ECU to make real-time adjustments to the air-fuel ratio, ensuring efficient combustion under varying operating conditions.

Conclusion

In summary, the 4981332 Air Intake Manifold is a key player in the engine’s air induction system, working in harmony with the throttle body, fuel injectors, cylinder head, and potentially forced induction components to deliver a precise air-fuel mixture to the engine’s combustion chambers. Its design and construction are tailored to meet the demands of heavy-duty commercial truck applications, ensuring reliable performance and efficiency.