5256407
Thermostat Housing
Cummins®

The Cummins 5256407 Thermostat Housing is a critical component for commercial trucks equipped with Cummins engines. It houses the thermostat, which regulates coolant flow to maintain optimal engine temperature, essential for efficient performance and longevity ¹.

Basic Concepts of Thermostat Housing

A thermostat housing is part of the engine cooling system that encases the thermostat. It provides a secure environment for the thermostat to operate and facilitates coolant passage to and from the engine. The housing interacts with the thermostat and coolant passages ².

Purpose of the Cummins 5256407 Thermostat Housing

This Cummins part is integral to engine operation. It maintains optimal engine temperature by securely holding the thermostat and allowing controlled coolant flow. This regulation ensures the engine operates within its designed temperature range, contributing to efficient performance and preventing damage from overheating or underheating ³.

Key Features

The 5256407 is constructed from durable materials resistant to high temperatures and pressures. Its design includes precise coolant passages and integration points for sensors that monitor engine temperature, contributing to its performance and longevity.

Benefits

Using this part can lead to improved engine efficiency due to its role in maintaining consistent engine temperature. Reliable temperature regulation ensures the engine operates within its optimal range, contributing to extended engine life. The housing’s design and construction support its durability under demanding conditions.

Installation Considerations

When installing the 5256407, it is important to follow the manufacturer’s guidelines for proper fit and function. This includes specific torque specifications for fasteners and ensuring all gaskets and seals are in good condition. Proper installation is key to the housing’s effective operation and the overall health of the engine cooling system.

Troubleshooting and Maintenance

Common issues with thermostat housings can include leaks, which may be caused by worn gaskets or improper installation. Regular inspection and maintenance, such as checking for signs of wear or damage and ensuring all connections are secure, can help prevent such issues. If a problem is detected, it is important to address it promptly to avoid potential engine damage.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s product offerings are designed to meet the demanding requirements of commercial applications, providing reliable performance and efficiency.

Thermostat Housing Fitment for Cummins Engines

The Thermostat Housing part number 5256407, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is crucial for maintaining the engine’s optimal operating temperature by regulating the flow of coolant. Here is a detailed look at the compatibility of this thermostat housing with specific Cummins engines:

ISB CM2150 Series

• ISB CM2150
• ISB/ISD6.7 CM2150 SN

The ISB CM2150 and ISB/ISD6.7 CM2150 SN engines are part of the Cummins ISB series, known for their robust performance and reliability. The thermostat housing part 5256407 is specifically engineered to fit these engines, ensuring efficient coolant flow and temperature regulation.

ISBE CM2150 Series

• ISBE CM2150

The ISBE CM2150 engine is another variant within the Cummins lineup, designed for heavy-duty applications. The thermostat housing part 5256407 is compatible with this engine, providing a secure and effective seal to maintain the engine’s temperature within the desired range.

ISBE4 CM850 Series

• ISBE4 CM850

The ISBE4 CM850 engine is part of the Cummins ISBE4 series, which is engineered for high-performance applications. The thermostat housing part 5256407 is designed to fit this engine, ensuring that the coolant flows correctly and the engine operates at optimal temperatures.

QSB6.7 CM850 Series

• QSB6.7 CM850 (CM2850)

The QSB6.7 CM850 (CM2850) engine is a member of the Cummins QSB series, known for its versatility and durability. The thermostat housing part 5256407 is compatible with this engine, providing the necessary functionality to regulate coolant flow and maintain engine temperature.

QSB7 CM2880 B117

The QSB7 CM2880 B117 engine is a high-performance variant in the Cummins QSB series. The thermostat housing part 5256407 is designed to fit this engine, ensuring that the coolant circulates properly and the engine maintains its optimal operating temperature.

Each of these engines benefits from the precise engineering of the thermostat housing part 5256407, ensuring that the engine operates efficiently and reliably. This compatibility highlights Cummins’ commitment to providing high-quality, interchangeable parts across their engine lineup.

Role of Part 5256407 Thermostat Housing in Engine Systems

The thermostat housing, part 5256407, is integral to the efficient operation of engine systems. It serves as the enclosure for the thermostat, which regulates the flow of coolant between the engine and the radiator.

The thermostat housing is connected to the engine block and the upper radiator hose. Its primary function is to maintain the engine’s operating temperature within a specified range. When the engine is cold, the thermostat remains closed, preventing coolant from flowing to the radiator. As the engine warms up, the thermostat opens, allowing coolant to circulate and cool the engine.

The housing also interfaces with the engine’s coolant temperature sensor. This sensor monitors the temperature of the coolant and sends data to the engine control unit (ECU), which adjusts fuel delivery and ignition timing for optimal performance.

Furthermore, the thermostat housing is part of the cooling system that includes the water pump, radiator, and hoses. The water pump circulates coolant through the engine and radiator, while the radiator dissipates heat. The hoses connect these components, ensuring a continuous flow of coolant.

Conclusion

In summary, the 5256407 thermostat housing plays a significant role in maintaining engine temperature, ensuring efficient operation, and contributing to the overall reliability of the engine system. Proper installation, regular maintenance, and understanding its function within the engine cooling system are essential for optimal engine performance and longevity.