3934877
Water Inlet Connection
Cummins®

The Water Inlet Connection (Part #3934877) by Cummins is a component designed for use in commercial trucks. It serves a specific function within the engine cooling system, ensuring the efficient operation of the truck’s engine by facilitating the flow of coolant.

Basic Concepts of Water Inlet Connection

Water inlet connections in heavy-duty trucks are integral to the engine cooling system. Their primary function is to allow coolant to enter the engine block, where it absorbs heat generated by the combustion process. This coolant then circulates through the engine, transferring heat away from critical components and maintaining optimal operating temperatures ¹.

Purpose of the Water Inlet Connection

This part is designed to play a role in the engine cooling system by providing a secure and efficient pathway for coolant to enter the engine. It ensures that coolant is distributed evenly throughout the engine block, which helps in maintaining consistent temperatures across all engine components.

Key Features

This Cummins part is constructed from durable materials that resist corrosion and wear, ensuring longevity in demanding environments. Its design includes precise fittings and seals that prevent leaks and maintain the integrity of the cooling system. Additionally, it may feature unique attributes such as enhanced flow channels that improve coolant distribution.

Benefits

The advantages of using the Water Inlet Connection include improved coolant flow, which contributes to more effective engine cooling. Its durable construction ensures long-term reliability, potentially reducing the need for frequent replacements. Furthermore, by maintaining optimal engine temperatures, it may contribute to engine efficiency and longevity ².

Installation Process

Installing the 3934877 involves several steps to ensure proper integration into the engine cooling system. Begin by ensuring the engine is cool and the cooling system is drained. Remove the old connection, if applicable, and clean the mating surfaces. Apply a compatible sealant to the threads of the new connection before threading it into place. Tighten to the manufacturer’s specified torque to prevent leaks without over-tightening, which could damage the connection or the engine block.

Troubleshooting Common Issues

Common issues with water inlet connections may include leaks, corrosion, or blockages. To diagnose these problems, inspect the connection for signs of wear, corrosion, or damage. Check for leaks around the connection by running the engine and observing the area for coolant seepage. If a leak is detected, the connection may need to be replaced or repaired. Corrosion can often be addressed by cleaning the affected area and applying a corrosion-resistant coating. Blockages may require disassembly and cleaning of the cooling system.

Maintenance Tips

To ensure the longevity and optimal performance of the 3934877, regular maintenance is recommended. This includes periodic inspection for signs of wear or corrosion, ensuring all connections are tight and leak-free, and flushing the cooling system as per the manufacturer’s recommendations to remove any contaminants that could affect coolant flow or engine efficiency ³.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for quality and innovation in the commercial truck industry. Its product range includes engines, powertrains, and related components, all designed to meet the demanding requirements of commercial applications.

Compatibility with Cummins Engines

The Water Inlet Connection part 3934877, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is crucial for ensuring proper water flow into the engine’s cooling system, which is essential for maintaining optimal engine temperature and performance. Below is a detailed breakdown of the engines with which this part is compatible:

B Series Engines

• B4.5
• B5.6
• B5.9
• B5.9 CM2670 B152B
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556

G Series Engines

• G5.9
• G5.9 CM558

ISB Series Engines

• ISB CM550
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B127
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB5.9G CM2180

QSB Series Engines

• QSB5.9 44 CM550
• QSB5.9 CM2880 B139
• QSB5.9 CM550
• QSB7 CM2880 B117

This part is engineered to ensure a secure and efficient connection, facilitating the flow of water into the engine’s cooling system. It is compatible with the listed engines, providing a reliable solution for maintaining engine temperature and preventing overheating.

Role of Part 3934877 Water Inlet Connection in Engine Systems

The Water Inlet Connection is integral to the efficient operation of various engine systems by ensuring a consistent and regulated flow of coolant. This component interfaces directly with the water pump, facilitating the movement of coolant from the pump to the engine block.

As coolant is circulated, the Water Inlet Connection directs it through the engine block’s water jackets, where it absorbs heat generated by combustion. This heat transfer is vital for maintaining optimal engine temperature, preventing overheating, and ensuring the longevity of engine components.

Additionally, the Water Inlet Connection plays a role in the thermostat housing system. It allows coolant to flow to the thermostat, which regulates the temperature by controlling the flow between the engine and the radiator. When the engine is cold, the thermostat restricts coolant flow to the radiator, allowing the engine to reach operating temperature more quickly. As the engine warms, the thermostat opens, permitting coolant to circulate through the radiator where it is cooled before returning to the engine.

Furthermore, the Water Inlet Connection is often connected to the heater core, providing warm coolant to the vehicle’s heating system. This ensures that the cabin remains comfortable for occupants during colder weather.

Conclusion

In summary, the Water Inlet Connection is a key component in the coolant circulation system, contributing to engine efficiency, temperature regulation, and occupant comfort.