4359690
BREATHER,CRANKCASE
Cummins®

The Cummins 4359690 Crankcase Breather is a component designed to facilitate the proper ventilation of the crankcase in heavy-duty truck engines. Its role is to manage the pressure within the crankcase and expel contaminants, ensuring the engine operates efficiently and reliably.

Basic Concepts of Crankcase Breathers

A crankcase breather is a device that allows air to escape from the crankcase of an engine. As the engine operates, gases and vapors are produced within the crankcase. These byproducts need to be expelled to prevent pressure buildup, which can lead to oil leaks and reduced engine performance. Proper crankcase ventilation is vital for maintaining engine health and ensuring optimal operation ¹.

Purpose of the Cummins 4359690 Crankcase Breather

This Cummins part plays a role in the engine’s operation by managing the pressure within the crankcase and expelling contaminants. It allows fresh air to enter the crankcase while venting out gases, vapors, and contaminants that accumulate during engine operation. This process helps maintain a stable pressure environment, prevents oil contamination, and supports overall engine efficiency ².

Key Features

The 4359690 is constructed with durable materials to withstand the harsh conditions of heavy-duty truck engines. It incorporates advanced filtration capabilities to ensure that only clean air enters the crankcase, while effectively expelling contaminants. The design includes features that enhance its performance and longevity, such as a robust housing and efficient filtration media.

Benefits

This part offers several advantages. It contributes to improved engine performance by ensuring proper crankcase ventilation, which helps maintain optimal pressure levels and reduces the risk of oil contamination. Additionally, it extends engine life by preventing pressure-related damage and reducing wear on engine components. The breather also reduces maintenance requirements by minimizing the need for frequent oil changes and repairs associated with crankcase issues ³.

Installation Process

Installing the 4359690 involves several steps to ensure proper fit and function. The process begins with preparing the engine by ensuring the crankcase is clean and free of debris. The old breather, if present, should be removed, and any mounting brackets or hardware should be inspected for damage. The new breather is then positioned and secured in place using the provided hardware. It is important to verify that all connections are tight and that the breather is properly aligned to ensure effective ventilation.

Maintenance and Troubleshooting

Regular maintenance of the 4359690 is important to ensure optimal performance. This includes periodic inspection of the breather for signs of wear or damage, and cleaning or replacing the filtration media as needed. Common issues that may arise include reduced airflow, which can be caused by a clogged filter, or leaks, which may indicate a loose connection or damaged housing. Troubleshooting these issues typically involves inspecting the breather for visible signs of damage, cleaning or replacing the filter, and ensuring all connections are secure.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for innovation, quality, and reliability in the automotive and heavy-duty truck industry. The company offers a wide range of products and services designed to meet the needs of customers in various industries, including transportation, construction, agriculture, and power generation. Cummins is committed to sustainability and strives to develop solutions that reduce emissions and improve fuel efficiency.

Cummins Crankcase Breather 4359690 Compatibility

The Cummins Crankcase Breather part number 4359690 is designed to fit seamlessly with various engine models, ensuring optimal performance and reliability. This part is engineered to manage the ventilation needs of the engine’s crankcase, preventing the buildup of harmful gases and maintaining the integrity of the engine’s lubrication system.

ISV (Nissan) Engines

The Cummins Crankcase Breather 4359690 is compatible with the ISV (Infiniti Service Vehicle) engines produced by Nissan. This compatibility ensures that the breather effectively manages the crankcase ventilation, contributing to the engine’s overall efficiency and longevity. The breather’s design allows it to integrate smoothly with the ISV engine’s architecture, providing a reliable solution for managing crankcase pressure and preventing oil contamination.

By ensuring that the Cummins Crankcase Breather 4359690 fits well with the ISV engines, it supports the engine’s operational needs, maintaining a balance between performance and durability. This compatibility is crucial for maintaining the engine’s health and ensuring that it operates at peak efficiency.

Role of Part 4359690 Crankcase Breather in Engine Systems

This part is an essential component in the arrangement of various engine systems, facilitating the management of gases and pressures within the crankcase.

In the context of the engine’s crankcase, this breather allows for the release of built-up gases, which are a byproduct of the combustion process. These gases, which include unburnt fuel and combustion byproducts, can accumulate and increase pressure within the crankcase. The breather mitigates this by providing a controlled pathway for these gases to escape, thereby maintaining a stable internal pressure.

Additionally, the breather is integral in the arrangement of the Positive Crankcase Ventilation (PCV) system. It works in conjunction with the PCV valve to ensure that the released gases are routed back into the intake manifold. This not only helps in reducing emissions but also allows for the re-burning of unburnt fuel, enhancing overall engine efficiency.

Furthermore, the breather plays a role in the oil management system. By preventing excessive pressure build-up, it helps in maintaining the integrity of the oil seals and gaskets. This ensures that oil does not leak out and contaminants do not enter the crankcase, preserving the quality of the engine oil and prolonging the lifespan of engine components.

Conclusion

In summary, the 4359690 Crankcase Breather is a vital element in the arrangement of engine systems, contributing to pressure regulation, emission control, and oil management.