3957987
Breather Housing
Cummins®

The Cummins 3957987 Breather Housing is a critical component designed for commercial trucks, facilitating the ventilation of the engine’s crankcase. This part allows for the release of gases and vapors that accumulate during engine operation, maintaining internal pressure balance and contributing to the engine system’s efficiency and reliability ¹.

Basic Concepts of Breather Housing

A breather housing is essential for the engine system, allowing for the controlled release of gases and vapors from the crankcase. It prevents pressure buildup that could damage the engine, ensuring the crankcase remains at an optimal pressure for proper lubrication and cooling of engine components ².

Role of the 3957987 Breather Housing in Truck Operation

The Cummins 3957987 Breather Housing is tailored for commercial trucks, connecting to the crankcase and providing a vent for gases and vapors. This integration maintains the crankcase’s pressure, crucial for the lubrication system’s correct function. It also reduces emissions by redirecting crankcase vapors back into the intake system for combustion ³.

Key Features

Constructed from durable materials resistant to high temperatures and pressures, the Cummins 3957987 Breather Housing features a secure mounting system and precise fittings for a proper seal and efficient operation. It may include advanced filtration systems to trap contaminants, enhancing functionality and protecting engine components from wear.

Benefits

Using the Cummins 3957987 Breather Housing improves engine performance by maintaining optimal crankcase pressure, contributing to engine longevity by preventing harmful gas buildup. It enhances the reliability of the truck’s engine system through consistent and controlled release of crankcase byproducts.

Troubleshooting and Maintenance

Common issues with breather housings include blockages or leaks, affecting engine performance. Troubleshooting involves inspecting for damage, ensuring secure connections, and checking for obstructions. Maintenance practices include regular cleaning, periodic inspection, and replacement of filters or consumable parts.

About Cummins

Cummins Inc. is a global leader in power solutions, including engines, filtration, and emissions systems. With over a century of history, Cummins is renowned for quality and innovation in the commercial truck industry, designing products to meet demanding requirements and enhance vehicle efficiency and reliability.

Compatibility of Breather Housing Part 3957987 with Cummins Engines

The Breather Housing part 3957987 is designed to fit various Cummins engines, ensuring efficient and reliable operation. It is integral to the engine’s ventilation system, managing gas flow and preventing contaminants from entering the crankcase.

Compatible Engines

• 6C8.3
• C GAS PLUS CM556
• ISB CM850
• ISC CM850
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9.5 CM2880 L138
• QSB5.9 CM850
• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)

Grouping of Compatible Engines

The engines can be grouped based on their series and specifications, highlighting the versatility and importance of this part in maintaining the integrity of the engine’s crankcase ventilation system.

Role of Part 3957987 Breather Housing in Engine Systems

The Part 3957987 Breather Housing is essential for the efficient operation of various engine systems, strategically integrated to manage the crankcase breather system effectively.

Integration with Crankcase Breather System

The breather housing regulates crankcase pressure by facilitating the safe release of blow-by gases, preventing pressure buildup that could lead to oil leaks or engine damage.

Connection to Valve Cover

Mounted on the valve cover, the breather housing forms a sealed unit that channels expelled gases away from the engine compartment, keeping contaminants out of the crankcase while allowing safe venting of gases.

Interaction with Engine Brake (12V) Kit

In engines with an engine brake (12V) kit, the breather housing maintains optimal pressure levels, ensuring the engine brake operates efficiently without interference from excess crankcase pressure.

Overall Engine Performance

By managing crankcase pressure and facilitating the release of blow-by gases, the breather housing contributes to overall engine performance, maintaining clean oil, reducing wear on internal components, and ensuring the engine operates within its designed parameters. This leads to improved reliability and longevity of the engine.

Conclusion

The Cummins 3957987 Breather Housing is a vital component for the efficient and reliable operation of commercial truck engines. Its role in maintaining crankcase pressure, facilitating the release of gases and vapors, and integrating with various engine systems underscores its importance in engine performance and longevity.