4003278
Water Inlet Connection
Cummins®

The Water Inlet Connection (Part #4003278) by Cummins is a component designed to facilitate the efficient operation of commercial trucks. This part is integral to the engine cooling system, ensuring that the engine maintains optimal operating temperatures. Its role in the cooling process underscores its significance in the overall performance and reliability of the vehicle ¹.

Basic Concepts of Water Inlet Connection

Water inlet connections in engine cooling systems are designed to allow coolant to enter the engine block. This process is fundamental to dissipating heat generated during engine operation. By directing coolant into the engine, these connections help regulate temperature, which is vital for the engine’s longevity and efficiency ². The design and placement of the water inlet connection are critical to ensuring a consistent flow of coolant throughout the engine.

Purpose of the 4003278 Water Inlet Connection

This Cummins part plays a role in the engine cooling system by providing a pathway for coolant to enter the engine block. This part ensures that coolant is distributed evenly, which aids in maintaining consistent engine temperatures. Its function is to support the overall cooling efficiency of the engine, contributing to the truck’s performance and durability ³.

Key Features

The 4003278 is characterized by its robust design and the materials used in its construction. It is made from high-quality materials that resist corrosion and wear, ensuring durability in demanding environments. The connection is designed to fit securely, minimizing the risk of leaks and ensuring a reliable coolant flow. Additionally, its design allows for easy installation and maintenance, enhancing its practicality for commercial use.

Benefits

The advantages of the 4003278 include improved engine cooling efficiency, which contributes to the overall performance of the truck. Its durable construction ensures long-term reliability, reducing the need for frequent replacements. The connection’s design also facilitates easier maintenance, allowing for quick inspections and repairs when necessary.

Installation Process

Installing the 4003278 involves several steps to ensure proper fitting and function. First, the engine compartment should be prepared by ensuring the engine is cool and the old connection, if present, is removed. The new connection should be aligned with the engine block and secured according to the manufacturer’s instructions. It is important to check for proper alignment and sealing to prevent leaks. After installation, the system should be tested to confirm that coolant flows without obstruction.

Common Issues and Troubleshooting

Typical problems associated with water inlet connections include leaks, blockages, and corrosion. Leaks can often be traced to improper installation or wear and tear on the connection. Blockages may occur due to debris in the coolant system, requiring a thorough cleaning. Corrosion can be mitigated by using high-quality coolant and regularly inspecting the connection for signs of damage. Addressing these issues promptly can prevent more significant engine problems.

Maintenance Tips

To ensure the optimal performance and longevity of the 4003278, routine maintenance is recommended. This includes regular inspections for signs of wear, corrosion, or leaks. The coolant system should be flushed and refilled according to the manufacturer’s recommendations to prevent buildup and ensure efficient cooling. Additionally, checking the connection’s fit and seals during maintenance intervals can help identify potential issues before they lead to more significant problems.

Cummins Overview

Cummins is a renowned manufacturer with a long-standing reputation in the automotive industry. The company is known for its commitment to producing high-quality components that enhance the performance and reliability of vehicles. Cummins’ expertise in engine technology and cooling systems is reflected in the design and functionality of the 4003278, demonstrating the brand’s dedication to innovation and quality in automotive manufacturing.

Water Inlet Connection Part 4003278 Compatibility with Cummins Engines

The Water Inlet Connection part 4003278, manufactured by Cummins, is designed to integrate seamlessly with a range 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.

Compatibility with Specific Engine Models

• 6B5.9: The Water Inlet Connection part 4003278 is engineered to fit the 6B5.9 engine, facilitating the flow of coolant into the engine. This ensures that the engine maintains optimal operating temperatures, enhancing performance and longevity.

• QSB6.7 CM2250 and QSB6.7 CM850 (CM2850): For the QSB6.7 series engines, including the CM2250, CM850, and CM2850 variants, the part 4003278 is specifically designed to connect the water inlet to the engine. This connection is vital for maintaining the cooling system’s integrity, preventing overheating, and ensuring efficient engine operation.

By ensuring a secure and reliable connection, the Water Inlet Connection part 4003278 plays a pivotal role in the overall performance and durability of these Cummins engines.

Role of Part 4003278 Water Inlet Connection in Engine Systems

The part 4003278 is integral to the efficient operation of engine systems, facilitating the seamless introduction of water into the system. This component is designed to interface with the water pump, ensuring a consistent and reliable flow of coolant into the engine block.

When the Water Inlet Connection is properly fitted, it allows the coolant to circulate through the engine’s water jacket, effectively absorbing heat generated by combustion. This circulation is vital for maintaining optimal engine temperature, preventing overheating, and ensuring the longevity of engine components.

Additionally, the Water Inlet Connection works in conjunction with the thermostat to regulate the flow of coolant based on engine temperature. As the engine warms up, the thermostat modulates the coolant flow, allowing the Water Inlet Connection to deliver coolant at the necessary rate to maintain thermal stability.

The connection also plays a role in integrating with the radiator, where the coolant releases heat before recirculating back into the engine. This continuous cycle is essential for dissipating heat and preserving engine efficiency.

Furthermore, the Water Inlet Connection is engineered to seal effectively against the engine block, preventing leaks that could lead to coolant loss and potential engine damage. Its design ensures a secure fit, contributing to the overall reliability of the cooling system.

Conclusion

In summary, the part 4003278 is a key component in the engine’s cooling system, ensuring efficient coolant flow, temperature regulation, and system integrity. Its robust design, compatibility with various Cummins engines, and role in maintaining optimal engine performance underscore its importance in commercial truck operations.