3930822
Water Inlet Connection
Cummins®

Introduction

The Water Inlet Connection 3930822, a component designed by Cummins for heavy-duty truck engines, facilitates efficient coolant flow into the engine. This part is essential for maintaining optimal engine temperature and performance, especially under rigorous operating conditions ¹.

Purpose and Function

This Cummins part is integral to the engine cooling system, allowing coolant to enter the engine block where it absorbs heat from the combustion process. Its role in ensuring a steady and unobstructed flow of coolant is crucial for regulating engine temperature, preventing overheating, and protecting the engine from potential damage ².

Key Features

Constructed from high-quality materials, the Water Inlet Connection 3930822 is designed to be durable and resistant to corrosion. It features precise fittings and seals to prevent leaks and maintain the integrity of the cooling system. The component is engineered to withstand the high pressures and temperatures typical of heavy-duty engine environments, enhancing its performance and longevity ³.

Benefits

The use of this part offers several advantages, including improved coolant flow for effective heat dissipation within the engine. This enhanced flow contributes to better engine protection against overheating, extending the engine’s lifespan. Additionally, the component’s robust design and materials increase the reliability of the cooling system, even under demanding operating conditions.

Installation and Compatibility

Proper installation of the Water Inlet Connection 3930822 is crucial for its effective function. It should be installed according to the manufacturer’s guidelines to ensure a secure fit and optimal performance. Compatibility with specific engine models and systems is ensured through rigorous testing and design, guaranteeing that the component integrates seamlessly with the engine’s cooling system.

Maintenance and Troubleshooting

Routine maintenance of the Water Inlet Connection 3930822 involves checking for signs of wear, corrosion, or leaks. Regular inspections can help identify potential issues before they lead to more significant problems. Common issues may include leaks at the connection points or blockages within the component. Troubleshooting steps may involve tightening connections, cleaning the component, or, in some cases, replacing it to ensure the cooling system’s continued efficiency.

Performance in Various Conditions

The Water Inlet Connection 3930822 is designed to perform reliably under a range of operating conditions. Whether facing extreme temperatures, high engine loads, or varying speeds, its construction and design ensure it can withstand the demands placed upon it. This resilience is crucial for maintaining engine efficiency and protection in the challenging environments typical of heavy-duty truck operations.

Cummins Overview

Cummins Inc. is a global leader in the design, manufacture, and distribution of engines and related technologies. With a history spanning over a century, Cummins has established a reputation for quality, innovation, and reliability in the automotive and heavy-duty truck industries. The company’s commitment to excellence is evident in its wide range of products, designed to meet the demanding requirements of modern engines and vehicles.

Compatibility with Cummins Engines

The Water Inlet Connection 3930822 is designed to fit seamlessly with a variety of Cummins engines, ensuring efficient water flow and optimal engine performance. This part is crucial in maintaining the engine’s cooling system integrity.

Compatible Engines

• 4B3.9
• 6B5.9
• B5.9 G
• B5.9 GAS PLUS CM556
• ISB CM550
• ISB5.9G CM2180
• QSB5.9 30 CM550
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

Grouping of Compatible Engines

Group 1: B5.9 Series

• B5.9 G
• B5.9 GAS PLUS CM556

Group 2: ISB Series

• ISB CM550
• ISB5.9G CM2180

Group 3: QSB Series

• QSB5.9 30 CM550
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

Standalone Engines

• 4B3.9
• 6B5.9

This part ensures that the water inlet connection is properly aligned and secured, facilitating the smooth operation of the cooling system across these engines.

Role of Part 3930822 in Engine Systems

The Water Inlet Connection, identified by part number 3930822, is an integral component in the cooling systems of various engine setups. Its primary function is to facilitate the entry of coolant into the engine block, ensuring that the internal components remain at optimal operating temperatures.

Interaction with Key Engine Components

1. Engine Block: The water inlet connection is directly attached to the engine block. It allows coolant to flow into the block’s water jackets, which surround the cylinders and other heat-generating parts. This ensures that the heat is efficiently dissipated, preventing overheating.
2. Thermostat Housing: Often, the water inlet connection is part of the thermostat housing assembly. This housing contains the thermostat, which regulates the flow of coolant based on engine temperature. The inlet connection ensures a smooth transition of coolant into the housing, contributing to stable temperature control.
3. Coolant Hoses: The inlet connection interfaces with the coolant hoses that transport coolant from the radiator to the engine. It provides a secure and leak-proof connection, maintaining the integrity of the cooling system.
4. Water Pump: The water inlet connection works in conjunction with the water pump, which circulates coolant throughout the engine. It ensures that the coolant enters the engine block at the correct point, optimizing the flow and efficiency of the cooling system.
5. Radiator: Although the radiator itself does not directly connect to the water inlet, the efficient flow of coolant from the inlet connection to the engine block ensures that the radiator can effectively cool the returning hot coolant.
6. Heat Exchanger: In systems with additional cooling requirements, such as those found in high-performance engines, the water inlet connection may also interact with a heat exchanger. This component further cools the coolant before it re-enters the engine, enhancing overall thermal management.

By ensuring a consistent and reliable flow of coolant into the engine, the water inlet connection plays a significant role in maintaining engine health and performance. Its integration with various engine components underscores its importance in the cooling system’s functionality.

Conclusion

The Water Inlet Connection 3930822 by Cummins is a critical component in the cooling systems of heavy-duty truck engines. Its design and function are essential for maintaining optimal engine temperature and performance, ensuring the longevity and reliability of the engine under demanding conditions. Proper installation, maintenance, and understanding of its role within the engine system are key to maximizing its benefits.