4940345
Intake Manifold Cover
Cummins®

The 4940345 Intake Manifold Cover, manufactured by Cummins, is a critical component in heavy-duty truck engines, contributing to their performance and efficiency.

Basic Concepts of an Intake Manifold Cover

An intake manifold cover is positioned atop the intake manifold, which distributes the air-fuel mixture to the engine’s cylinders. This cover protects the manifold from external contaminants and maintains a sealed environment for optimal engine operation. It interacts with the intake manifold, gaskets, and other engine components to ensure efficient airflow and engine performance ¹.

Purpose of the 4940345 Intake Manifold Cover

The 4940345 is designed to enhance engine operation by managing airflow effectively. It ensures even distribution of the air-fuel mixture across the cylinders, reducing emissions and improving fuel efficiency by maintaining a sealed system that prevents air leaks ².

Key Features

This Cummins part is constructed with durable materials to withstand high temperatures and pressures within an engine environment. Its design includes precise sealing mechanisms for a tight fit over the intake manifold. Unique design elements may include reinforced areas to handle stress points and smooth surfaces to facilitate easy installation and removal.

Benefits

Using the 4940345 Intake Manifold Cover results in improved engine performance due to better airflow management. Its durable construction contributes to longevity, reducing the need for frequent replacements. Additionally, by maintaining a sealed system, it contributes to fuel efficiency and emissions reduction, aligning with environmental standards ³.

Installation Process

Installing the 4940345 involves several steps to ensure a proper fit. Preparatory steps include cleaning the intake manifold surface to remove any debris or old gasket material. The necessary tools may include torque wrenches to secure the cover in place without over-tightening. Best practices involve following the manufacturer’s guidelines for torque specifications and ensuring all sealing surfaces are clean and intact before installation.

Troubleshooting and Maintenance

Common issues with the 4940345 may include leaks due to worn gaskets or improper installation. Diagnostic tips involve checking for signs of air leaks, such as rough idling or decreased engine performance. Maintenance practices to prolong its lifespan include regular inspections for wear and tear, ensuring gaskets are in good condition, and following the manufacturer’s recommendations for replacement intervals.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions control technologies. With a history spanning over a century, Cummins has established a reputation for quality, reliability, and innovation in the heavy-duty truck industry. Their product range includes engines, components, and aftermarket parts designed to meet the demanding requirements of commercial vehicles.

Compatibility of Intake Manifold Cover Part 4940345 with Cummins Engines

The Cummins Intake Manifold Cover part 4940345 is designed to fit a variety of Cummins engines, ensuring a secure and efficient seal that is critical for maintaining engine performance. Here is a detailed look at the compatibility of this part with the listed engines:

ISB Series

• ISB (Chrysler)
• ISB CM2150
• ISB CM850

The ISB series engines, including the ISB (Chrysler), ISB CM2150, and ISB CM850, are designed for heavy-duty applications. The part 4940345 fits seamlessly with these engines, providing a robust connection between the intake manifold and the engine block. This ensures optimal airflow and pressure, contributing to the engine’s overall efficiency and power output.

ISB 6.7 Series

• ISB6.7 CM2250
• ISB6.7 CM2350 B101

The ISB 6.7 series engines, such as the ISB6.7 CM2250 and ISB6.7 CM2350 B101, are known for their high performance and reliability. The intake manifold cover part 4940345 is engineered to fit these engines perfectly, ensuring a tight seal that prevents air leaks. This is crucial for maintaining the correct air-to-fuel ratio, which is essential for the engine’s combustion process.

QSB 6.7 Series

• QSB6.7 CM2250
• QSB6.7 CM2350 B105

The QSB 6.7 series engines, including the QSB6.7 CM2250 and QSB6.7 CM2350 B105, are designed for both on-road and off-road applications. The part 4940345 is compatible with these engines, providing a reliable seal that enhances the engine’s performance. This compatibility ensures that the engines can operate efficiently under various conditions, maintaining their power and reliability.

Role of Part 4940345 Intake Manifold Cover in Engine Systems

The 4940345 Intake Manifold Cover is an essential component that interfaces with several key elements within the engine system, ensuring optimal performance and efficiency.

Integration with Air Intake Manifold

The Intake Manifold Cover, specifically part 4940345, is designed to fit securely over the air intake manifold. This cover plays a significant role in maintaining the integrity of the air-fuel mixture by preventing any external contaminants from entering the system. It also helps in reducing noise emissions and enhancing the overall aerodynamics of the engine bay. The cover ensures a smooth airflow path from the air intake to the cylinders, which is vital for consistent engine performance.

Compatibility with Long Block Kit

When integrating with a long block kit, the Intake Manifold Cover serves as a protective layer over the intake manifold, which is a part of the long block assembly. This cover is essential for sealing the manifold, preventing any leaks that could affect engine efficiency. It also aids in thermal management by insulating the manifold from extreme temperatures, thus contributing to the longevity and reliability of the engine components within the long block kit.

Conclusion

In summary, the 4940345 Intake Manifold Cover is a versatile and critical component that fits a range of ISB and QSB 6.7 series engines. Its design ensures a secure and efficient seal, which is critical for maintaining the engine’s performance and efficiency. The benefits of using this part include improved engine performance, durability, and contributions to fuel efficiency and emissions reduction.