3103910
Water Inlet Connection
Cummins®

Introduction

The Water Inlet Connection 3103910 is a component designed by Cummins for use in the cooling systems of heavy-duty trucks. Its purpose is to facilitate the efficient flow of coolant into the engine, thereby playing a role in maintaining optimal engine temperature and ensuring reliable performance under various operating conditions ¹.

Basic Concepts of Water Inlet Connection

Water inlet connections are integral to engine cooling systems. They allow coolant to enter the engine block, where it absorbs heat generated by combustion. The coolant then circulates through the engine, transferring heat away from critical components and back to the radiator, where it is cooled before re-entering the system. This continuous cycle helps to maintain engine temperature within specified limits, enhancing engine efficiency and longevity ².

Purpose of the 3103910 Water Inlet Connection

The 3103910 Water Inlet Connection is specifically designed to ensure a secure and efficient transfer of coolant into the engine. It connects the coolant supply line to the engine block, allowing for a smooth and uninterrupted flow of coolant. This component is engineered to withstand the pressures and temperatures encountered in heavy-duty truck engines, ensuring reliable operation.

Key Features

The 3103910 Water Inlet Connection features a robust design that includes precision-machined fittings to ensure a tight seal and prevent coolant leaks. It is constructed from high-quality materials that offer resistance to corrosion and wear, enhancing its durability. Additionally, the connection is designed for easy installation, with alignment features that simplify the fitting process and reduce the risk of improper installation.

Benefits

The advantages of the 3103910 Water Inlet Connection include improved coolant flow, which enhances the efficiency of the cooling system. Its durable construction ensures long-term reliability, even under the demanding conditions typical of heavy-duty truck operations. Furthermore, the design of the connection facilitates ease of installation, reducing downtime during maintenance procedures.

Installation Process

To install the 3103910 Water Inlet Connection, first, ensure the engine is cool and the cooling system is drained. Locate the fitting on the engine block and clean the area to remove any debris. Align the connection with the fitting and secure it in place using the appropriate tools. Once installed, refill the cooling system with the recommended coolant and check for leaks. It is important to follow the manufacturer’s instructions to ensure proper installation.

Common Issues and Troubleshooting

Common problems with water inlet connections may include leaks, corrosion, or blockages. To address these issues, inspect the connection for signs of wear or damage. If a leak is detected, ensure the connection is properly seated and tightened. Corrosion can be mitigated by using the correct type of coolant and regularly flushing the system. Blockages may require disassembly and cleaning of the connection and associated hoses.

Maintenance Tips

Regular maintenance of the 3103910 Water Inlet Connection involves inspecting it for signs of wear, corrosion, or leaks during routine engine checks. It is advisable to follow the manufacturer’s recommended maintenance schedule for coolant changes and system flushes to prevent buildup and ensure optimal performance. Keeping the connection and surrounding areas clean can also help in identifying potential issues early.

Role in Engine Cooling System

The 3103910 Water Inlet Connection integrates with other components in the engine cooling system to maintain optimal engine temperature. By ensuring a consistent flow of coolant into the engine, it plays a role in the efficient transfer of heat away from the engine block. This integration is vital for the overall performance and reliability of the engine cooling system.

Compatibility with Cummins Engines

The Water Inlet Connection part 3103910 is designed to fit seamlessly with a range of Cummins engines. This part is crucial for maintaining the proper flow of coolant, ensuring the engine operates efficiently and effectively. Below is a detailed look at the compatibility of this part with various Cummins engines:

ISX15 Series

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

The Water Inlet Connection part 3103910 is specifically engineered to integrate with the ISX15 series engines. This compatibility ensures that the coolant flow is optimized, contributing to the engine’s overall performance and longevity.

QSX15 Series

• QSX15 CM2250 ECF
• QSX15 CM2350 X105

For the QSX15 series engines, the part 3103910 is designed to fit perfectly, ensuring that the coolant system operates without any leaks or inefficiencies. This compatibility is crucial for maintaining the engine’s cooling efficiency and preventing overheating.

X15 Series

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

The Water Inlet Connection part 3103910 is also compatible with the X15 series engines. This part ensures that the coolant system is properly sealed and functional, contributing to the engine’s optimal performance and reliability.

Integration with Cooling System Components

1. Radiator: The Water Inlet Connection is directly connected to the radiator, allowing coolant to flow from the radiator into the engine block. This connection is essential for maintaining a continuous coolant circulation, which is vital for dissipating heat generated by the engine.

2. Water Pump: Positioned between the water pump and the engine block, the Water Inlet Connection facilitates the movement of coolant driven by the water pump. This ensures that coolant is consistently circulated through the engine, preventing overheating.

3. Thermostat Housing: Often integrated with the thermostat housing, the Water Inlet Connection helps regulate the flow of coolant based on engine temperature. This regulation is key to maintaining optimal engine operating temperatures.

4. Engine Block: The connection point for the Water Inlet Connection on the engine block allows coolant to enter the cylinder heads and other critical components. This direct flow is necessary for dissipating heat from combustion chambers and other high-temperature areas.

Function in Engine Operation

• Heat Management: By enabling the smooth flow of coolant into the engine block, the Water Inlet Connection plays a significant role in heat management. It ensures that coolant reaches all necessary areas, preventing hotspots and maintaining engine efficiency.

• System Integrity: The Water Inlet Connection contributes to the overall integrity of the cooling system. Its proper function ensures that there are no leaks or disruptions in coolant flow, which could lead to engine damage.

• Component Protection: Efficient coolant flow facilitated by the Water Inlet Connection protects engine components from thermal stress. This protection extends the lifespan of parts such as cylinder heads, pistons, and bearings.

Conclusion

The Water Inlet Connection 3103910 is a fundamental component in the cooling system, ensuring that coolant is effectively distributed throughout the engine to maintain optimal operating conditions. Its robust design, compatibility with various Cummins engines, and role in heat management make it an essential part of the engine cooling system.