3930888
Water Inlet Connection
Cummins®

The Water Inlet Connection 3930888 by Cummins is a component designed for use in commercial trucks. Its purpose is to facilitate the efficient operation of the engine cooling system. Cummins, a well-established manufacturer in the industry, produces this part to ensure reliable performance in demanding environments ¹.

Basic Concepts of Water Inlet Connection

A Water Inlet Connection is a component within the cooling system of a truck engine. It functions by allowing coolant to enter the engine block, which is vital for dissipating heat generated during engine operation. Maintaining optimal engine temperature is important for engine efficiency and longevity. The Water Inlet Connection plays a role in this process by ensuring a steady flow of coolant into the engine ².

Role of the 3930888 Water Inlet Connection in Truck Operation

The 3930888 Water Inlet Connection is specifically designed to integrate into the cooling system of commercial truck engines. It facilitates the flow of coolant into the engine block, which is necessary for efficient heat dissipation. This component ensures that the coolant circulates effectively, helping to maintain the engine at an optimal operating temperature under various driving conditions ³.

Key Features

The 3930888 Water Inlet Connection features a design that enhances its performance and durability. It is constructed using materials that are resistant to corrosion and high temperatures, ensuring longevity in harsh operating environments. Unique attributes of this component include precise engineering for a secure fit and efficient coolant flow, contributing to its overall effectiveness in the cooling system.

Benefits

Using the 3930888 Water Inlet Connection offers several benefits. It contributes to improved engine cooling efficiency, which is important for maintaining engine performance and longevity. The durability and reliability of this component ensure that it can withstand the rigors of commercial truck operation. Additionally, its design may offer advantages over other similar components, such as enhanced coolant flow and resistance to wear.

Troubleshooting and Maintenance

Common issues that may arise with the 3930888 Water Inlet Connection include leaks or blockages. Troubleshooting steps may involve inspecting the connection for signs of wear or damage, ensuring that it is properly installed, and checking for any obstructions in the coolant flow. Regular maintenance, such as cleaning and inspecting the component, can help ensure its longevity and optimal performance.

About Cummins

Cummins Inc. is a leading manufacturer of diesel engines and related components, with a strong reputation in the commercial truck industry. The company has a history of innovation and expertise in engine technology, providing reliable and high-performance products to meet the demands of various applications. Cummins’ commitment to quality and customer satisfaction has established it as a trusted name in the industry.

Compatibility of Water Inlet Connection Part 3930888 with Cummins Engines

The Water Inlet Connection part 3930888, manufactured by Cummins, is designed to fit seamlessly with a variety of Cummins engines. This part is crucial for the proper functioning of the engine’s cooling system, ensuring that water is efficiently directed into the engine block.

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

The engines listed above can be grouped based on their series and specifications:

1. B5.9 Series:

   • B5.9 G
   • B5.9 GAS PLUS CM556

2. ISB Series:

   • ISB CM550
   • ISB5.9G CM2180

3. QSB Series:

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

4. Other Series:

   • 4B3.9
   • 6B5.9

Each of these engines, despite their differences, is designed to work with the Water Inlet Connection part 3930888, ensuring compatibility across various models and specifications.

Role of Part 3930888 Water Inlet Connection in Engine Systems

The part 3930888 Water Inlet Connection is integral to the efficient operation of various engine systems by facilitating the entry of coolant into the engine block. This component ensures a secure and leak-free connection between the engine’s water passages and the external coolant supply lines.

Integration with Engine Components

1. Engine Block: The Water Inlet Connection interfaces directly with the engine block, allowing coolant to flow into the water jackets surrounding the cylinders. This helps in dissipating heat generated during combustion.

2. Thermostat Housing: Often, the Water Inlet Connection is part of the thermostat housing assembly. It allows coolant to enter the system while the thermostat regulates the flow based on engine temperature.

3. Coolant Hoses: This component connects to the coolant hoses that transport coolant from the radiator to the engine and back. It ensures a consistent flow of coolant, which is essential for maintaining optimal engine temperature.

4. Water Pump: The Water Inlet Connection works in conjunction with the water pump, which circulates coolant throughout the engine. It provides a pathway for coolant to enter the system after being pumped from the radiator.

5. Radiator: By connecting to the radiator via hoses, the Water Inlet Connection ensures that the coolant can be effectively cooled before re-entering the engine, thus maintaining a stable operating temperature.

6. Heater Core: In systems where the engine coolant also services the vehicle’s heater, the Water Inlet Connection plays a role in ensuring that warm coolant reaches the heater core for cabin heating.

7. Pressure Cap: The connection is also part of the sealed cooling system that includes the pressure cap. It helps maintain system pressure, which raises the boiling point of the coolant and enhances cooling efficiency.

Conclusion

In summary, the Water Inlet Connection (part 3930888) is a key component in the coolant circulation system, ensuring that the engine remains within its optimal temperature range for efficient and reliable operation. Its compatibility with various Cummins engines, coupled with its robust design and integration with critical engine components, underscores its importance in maintaining engine performance and longevity.