3943549
Water Inlet Connection
Cummins®

Introduction

The Water Inlet Connection 3943549, a component designed by Cummins, is integral to the cooling systems of heavy-duty trucks. This part ensures the efficient flow of coolant into the engine, contributing to the maintenance of optimal operating temperatures and the overall reliability of the engine cooling system.

Basic Concepts of Water Inlet Connection

Water inlet connections in engine cooling systems are designed to allow coolant to enter the engine block. These connections are essential for the circulation of coolant, which absorbs heat from the engine and transfers it away, thus preventing overheating. The design and placement of the water inlet connection ensure that coolant is distributed evenly throughout the engine, enhancing cooling efficiency ¹.

Purpose and Function

The Water Inlet Connection 3943549 is specifically engineered to serve as the entry point for coolant into the engine of a heavy-duty truck. By allowing coolant to flow into the engine block, it contributes to maintaining the engine’s temperature within a specified range. This is achieved through the precise design of the connection, which ensures that coolant is delivered efficiently and effectively to the areas of the engine that require cooling the most ².

Key Features

This Cummins part is constructed from high-quality materials that are resistant to corrosion and wear, ensuring durability and longevity. Its design includes features that enhance the flow of coolant, such as smooth internal passages and a secure fitting mechanism that prevents leaks. These attributes contribute to the overall performance and reliability of the cooling system.

Benefits

The use of the Water Inlet Connection 3943549 offers several benefits. It improves the flow of coolant into the engine, which enhances cooling efficiency and protects the engine from overheating. This component also increases the reliability of the cooling system under demanding operating conditions, ensuring that the engine remains cool and operates efficiently even in challenging environments ³.

Installation and Compatibility

Proper installation of the Water Inlet Connection 3943549 is crucial for ensuring the efficient operation of the engine cooling system. It is designed to be compatible with various Cummins engine models, offering a seamless integration into the existing cooling system. Specific installation procedures should be followed to ensure that the connection is secure and functions as intended.

Maintenance and Troubleshooting

Routine maintenance of the Water Inlet Connection 3943549 is important for ensuring its optimal performance and longevity. This includes regular inspections for signs of wear or damage, and ensuring that the connection remains secure and free from leaks. Troubleshooting common issues, such as leaks or reduced coolant flow, may involve checking the connection for proper installation and ensuring that all components are in good condition.

Cummins 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 quality, Cummins is renowned for its commitment to producing reliable and efficient engine components. The company’s product offerings span a wide range of industries, including automotive, where it is known for delivering high-performance and durable solutions.

Cummins Engine Compatibility with Part 3943549

The Cummins part 3943549, a Water Inlet Connection, is designed to fit a variety of Cummins engines. This part is integral in ensuring the proper flow of coolant within the engine, maintaining optimal operating temperatures and preventing overheating. Below is a detailed overview of the engines that are compatible with this part:

ISB Series Engines

• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

QSB Series Engines

• QSB3.9 30 CM550
• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB5.9 30 CM550
• QSB5.9 44 CM550
• QSB5.9 CM550
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

Other Cummins Engines

• 4B3.9
• 6B5.9
• B4.5
• B6.7 CM2670 B164C

The Water Inlet Connection part 3943549 is engineered to ensure compatibility across these engines, facilitating a seamless installation process. This part is crucial for maintaining the integrity of the engine’s cooling system, ensuring longevity and performance.

Role of Part 3943549 Water Inlet Connection in Engine Systems

The part 3943549 water inlet connection is integral to the efficient operation of engine systems by facilitating the entry of coolant into the engine block. This component ensures a secure and leak-free connection between the coolant supply lines and the engine, maintaining consistent coolant flow.

When installed, the water inlet connection interfaces directly with the engine block, allowing coolant to circulate through the water jackets surrounding the cylinders. This circulation is essential for dissipating heat generated during combustion, thereby preventing engine overheating.

Additionally, the connection plays a role in integrating with the thermostat housing, ensuring that the thermostat can effectively regulate coolant flow based on engine temperature. This regulation is vital for maintaining optimal engine operating temperatures, which enhances performance and longevity.

The water inlet connection also connects to the upper and lower radiator hoses, creating a closed-loop system that allows coolant to travel from the engine to the radiator and back. This continuous circulation ensures that heat is efficiently transferred away from the engine, contributing to stable engine temperatures under varying operating conditions.

Conclusion

In summary, the part 3943549 water inlet connection is a key component in the coolant system, ensuring proper coolant distribution and temperature management within the engine. Its design, compatibility, and role in the cooling system make it a critical part for maintaining engine efficiency and reliability.