4970336
Coolant Flow Metering Orifice
Cummins®

The Coolant Flow Metering Orifice, identified by Part #4970336, is a component manufactured by Cummins, a well-established name in the automotive industry. This orifice is integral to the cooling systems of heavy-duty truck engines, ensuring that the engine operates within optimal temperature ranges. Cummins, known for its commitment to innovation and quality, provides this component as part of its extensive lineup of automotive parts designed to enhance engine performance and reliability ¹.

Basic Concepts

Coolant flow metering orifices are designed to regulate the flow of coolant within an engine’s cooling system. By controlling the rate at which coolant passes through the system, these orifices help maintain a consistent engine temperature. The Coolant Flow Metering Orifice functions by creating a precise restriction in the coolant pathway, which in turn allows for the fine-tuning of coolant flow rates. This regulation is vital for the efficient operation of the engine cooling system, ensuring that the engine neither overheats nor cools down too rapidly ².

Purpose and Function

The Coolant Flow Metering Orifice (Part #4970336) serves a specific role in the operation of heavy-duty trucks. Its primary function is to maintain optimal engine temperature by regulating coolant flow. This regulation is crucial for the efficient operation of the engine, as it ensures that the engine remains within its ideal temperature range under various operating conditions. By doing so, the orifice contributes to the overall efficiency of the engine and helps in prolonging its operational life ³.

Key Features

The Coolant Flow Metering Orifice is characterized by its precise design and the materials used in its construction. Typically made from durable materials that can withstand the high temperatures and pressures within an engine cooling system, this orifice is engineered to provide consistent performance over time. Its design ensures that it can be easily integrated into the cooling system, offering a reliable solution for coolant flow regulation.

Benefits

Incorporating the Coolant Flow Metering Orifice into heavy-duty truck engines offers several benefits. It contributes to improved engine efficiency by ensuring that the engine operates at optimal temperatures. This, in turn, can lead to enhanced cooling performance, reducing the risk of engine overheating. Additionally, by maintaining efficient engine operation, fleet operators may experience potential cost savings through reduced maintenance needs and improved fuel efficiency.

Installation and Compatibility

Proper installation of the Coolant Flow Metering Orifice is key to ensuring its effective operation. It is important to follow manufacturer guidelines for installation, which may include specific torque settings and orientation within the cooling system. This orifice is designed to be compatible with a range of heavy-duty truck models and engine configurations, offering a versatile solution for coolant flow regulation.

Troubleshooting and Maintenance

To ensure the Coolant Flow Metering Orifice operates effectively, it is important to be aware of common issues such as coolant leaks or restricted flow. Regular inspections and maintenance can help identify and address these issues promptly. Routine maintenance practices, such as checking for signs of wear or damage and ensuring proper installation, can contribute to the longevity and performance of the orifice.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history spanning over a century, Cummins has established a reputation for innovation, quality, and reliability in the automotive industry. The company’s commitment to advancing technology and improving the efficiency and performance of engines is evident in its extensive lineup of automotive components, including the Coolant Flow Metering Orifice.

Coolant Flow Metering Orifice (Part 4970336) in Cummins Engines

The Coolant Flow Metering Orifice, identified by part number 4970336, is a critical component in the cooling systems of various Cummins engines. This part is integral to maintaining optimal coolant flow, ensuring that the engine operates within its specified temperature range.

QSK50 Engines

In the QSK50 series, the Coolant Flow Metering Orifice is designed to manage the coolant flow efficiently. This engine is known for its robust performance and reliability, often used in heavy-duty applications such as marine and industrial settings. The orifice ensures that the coolant circulates effectively, preventing overheating and maintaining engine longevity.

CM2150 Engines

The CM2150 engine also benefits from the precise control provided by the Coolant Flow Metering Orifice. This engine is typically utilized in power generation and other demanding applications. The orifice’s role in regulating coolant flow is crucial for maintaining the engine’s efficiency and performance, especially under high-load conditions.

MCRS Engines

The MCRS engines, which are part of the Cummins range, incorporate the Coolant Flow Metering Orifice to enhance their cooling system’s functionality. These engines are often found in military and defense applications, where reliability and performance are paramount. The orifice ensures that the coolant flow is consistent, contributing to the engine’s overall durability and operational readiness.

By integrating the Coolant Flow Metering Orifice into these engines, Cummins ensures that each model maintains optimal performance and reliability, catering to a wide range of demanding applications.

Role of Part 4970336 Coolant Flow Metering Orifice in Engine Systems

The coolant flow metering orifice (part 4970336) is integral to the efficient operation of engine cooling systems. It is strategically positioned within the coolant pathway to regulate the flow of coolant through various components, ensuring optimal thermal management.

Interaction with Housing

The orifice is typically housed within the engine’s coolant passages, often integrated into the engine block or cylinder head housing. Its precise location allows it to control the rate at which coolant enters and exits the housing. This regulation helps maintain consistent coolant velocity, which is essential for effective heat transfer away from critical engine components.

Coordination with Thermostat

In conjunction with the thermostat, the coolant flow metering orifice plays a significant role in temperature regulation. The thermostat manages the overall flow of coolant based on engine temperature, opening and closing to allow coolant to circulate through the radiator. The orifice, however, fine-tunes this flow, ensuring that coolant distribution is even and that specific areas, such as the cylinder head and engine block, receive adequate cooling. This synergy between the orifice and thermostat helps prevent overheating and ensures the engine operates within its optimal temperature range.

Conclusion

The Coolant Flow Metering Orifice (Part #4970336) is a vital component in the cooling systems of heavy-duty truck engines, ensuring optimal engine temperature and efficiency. Its precise design and durable construction contribute to the reliable operation of the engine cooling system. By regulating coolant flow, this Cummins part plays a crucial role in maintaining engine performance and longevity, making it an essential component for fleet operators and maintenance professionals.