3967275
Intake Air Heater
Cummins®

Introduction

The Cummins 3967275 Intake Air Heater is designed to enhance the performance of heavy-duty trucks, especially in cold weather conditions. It preheats the intake air before it enters the engine, leading to improved engine efficiency and performance. This part is crucial for maintaining optimal engine function in varying environmental conditions.

Basic Concepts of Intake Air Heaters

An intake air heater warms the air entering an engine’s intake system, ensuring efficient combustion of the air-fuel mixture. It operates by using electrical resistance to generate heat, which is then transferred to the incoming air. This process reduces air density, allowing for better fuel atomization and combustion ¹.

Purpose of the Cummins 3967275 Intake Air Heater

The Cummins 3967275 Intake Air Heater improves engine performance in cold weather by preheating the intake air. This preheating leads to more efficient combustion, smoother engine starts, reduced emissions, and enhanced overall engine performance. It ensures the engine operates within its optimal temperature range, beneficial for engine longevity and fuel efficiency ².

Key Features

The Cummins 3967275 Intake Air Heater is characterized by its robust design and construction. Made from high-quality materials, it ensures durability and reliability under various operating conditions. It incorporates advanced technological features for precise temperature control and efficient operation. Its compact design ensures it fits well within the constraints of a truck’s engine compartment.

Benefits

Utilizing the Cummins 3967275 Intake Air Heater offers several advantages. It improves engine efficiency by ensuring the air-fuel mixture combusts more effectively, leading to reduced wear and tear on engine components. It enhances overall performance, particularly in cold weather, by facilitating smoother starts and more consistent engine operation ³.

Installation and Integration

Proper installation of the Cummins 3967275 Intake Air Heater is crucial for its effective operation. It should be integrated into the truck’s engine system according to the manufacturer’s guidelines. This may involve specific modifications or considerations to ensure compatibility with the existing engine setup. Careful attention to the installation process is necessary to avoid any issues that could affect the heater’s performance or the engine’s operation.

Troubleshooting and Maintenance

Common issues with the Cummins 3967275 Intake Air Heater may include electrical faults, heating element failure, or issues with the control system. Troubleshooting these problems typically involves checking the electrical connections, inspecting the heating elements, and ensuring the control system is functioning correctly. Regular maintenance, such as cleaning the heater and checking for any signs of wear or damage, is recommended to ensure optimal performance and longevity.

Performance in Various Conditions

The Cummins 3967275 Intake Air Heater is designed to perform effectively under a range of environmental conditions. In extreme cold, it ensures that the engine operates within its optimal temperature range, which is crucial for efficient combustion and engine protection. At high altitudes or under heavy load situations, the heater helps maintain engine performance by ensuring that the intake air is at the correct temperature for efficient combustion.

Cummins Company Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions solutions. With a strong reputation in the automotive industry, Cummins is known for its commitment to innovation and quality in manufacturing automotive components. The company’s focus on research and development ensures that its products, like the Cummins 3967275 Intake Air Heater, meet the high standards required for heavy-duty applications.

Compatibility of Cummins Intake Air Heater Part 3967275

The Cummins Intake Air Heater part number 3967275 is designed to fit a variety of Cummins engines, ensuring optimal performance and efficiency across different engine models. Here is a detailed overview of its compatibility:

ISC CM850 and QSC8.3 CM850 (CM2850)

The 3967275 Intake Air Heater is compatible with the ISC CM850 and QSC8.3 CM850 (CM2850) engines. These engines are known for their robust performance and reliability, often used in heavy-duty applications. The intake air heater ensures that the engine starts smoothly even in cold conditions by preheating the intake air.

ISL9 CM2150 SN and QSL8.9 CM2150 L141

This part fits the ISL9 CM2150 SN and QSL8.9 CM2150 L141 engines. These engines are part of the Cummins L9 series, which is widely recognized for its durability and efficiency in various industrial applications. The intake air heater is crucial for maintaining engine performance in colder climates.

ISL9.5 CM2880 L138 and QSL9 CM850 (CM2850)

The 3967275 Intake Air Heater is also compatible with the ISL9.5 CM2880 L138 and QSL9 CM850 (CM2850) engines. These engines are part of the Cummins L9 series, known for their high power output and efficiency. The intake air heater ensures that the engine operates at peak performance by providing the necessary preheating of the intake air.

L8.9 CM2670 L134C and L8.9 L121

This part fits the L8.9 CM2670 L134C and L8.9 L121 engines. These engines are part of the Cummins L8.9 series, which is known for its balance of power and fuel efficiency. The intake air heater is essential for ensuring smooth engine starts and maintaining performance in colder temperatures.

L9 CM2670 L128B and QSL9.3 CM2880 L113

The 3967275 Intake Air Heater is compatible with the L9 CM2670 L128B and QSL9.3 CM2880 L113 engines. These engines are part of the Cummins L9 series, which is recognized for its reliability and efficiency. The intake air heater ensures that the engine operates efficiently by preheating the intake air, especially in cold conditions.

QSC8.3 CM2880 C102

Lastly, the 3967275 Intake Air Heater fits the QSC8.3 CM2880 C102 engine. This engine is part of the Cummins QSC series, known for its versatility and performance in various applications. The intake air heater is crucial for ensuring that the engine starts smoothly and operates efficiently in colder climates.

By ensuring compatibility with these engines, the Cummins Intake Air Heater part number 3967275 provides a reliable solution for maintaining engine performance across a wide range of applications.

Role of Part 3967275 Intake Air Heater in Engine Systems

The part 3967275 Intake Air Heater is a component that enhances the performance and efficiency of engine systems, particularly in cold weather conditions. This component works in conjunction with several other parts to ensure optimal engine operation.

Interaction with the Air Intake System

The intake air heater is strategically positioned within the air intake system. Its primary function is to preheat the incoming air before it enters the engine’s combustion chamber. This preheating process is vital for several reasons:

• Improved Combustion Efficiency: Cold air is denser and can lead to inefficient combustion. By warming the air, the intake air heater ensures that the air-fuel mixture burns more completely, leading to better fuel economy and reduced emissions.
• Enhanced Engine Performance: Warmer air expands more readily, which can improve engine performance, especially during cold starts. This is particularly important for diesel engines, where cold air can lead to harder starts and increased wear on engine components.

Synergy with the Air Heater Starting System

The intake air heater often works in tandem with the air heater starting system. This system is designed to facilitate easier engine starts in cold conditions. The interaction between these components includes:

• Pre-Heat Phase: Before the engine starts, the intake air heater can be activated to warm the incoming air. This pre-heat phase reduces the stress on the engine during startup, making it easier to turn over.
• Continuous Operation: Once the engine is running, the intake air heater may continue to operate to maintain optimal air temperature. This ensures that the engine operates efficiently even as it warms up.

Contribution to Overall Engine Health

By ensuring that the air entering the engine is at an optimal temperature, the intake air heater contributes to the overall health and longevity of the engine. Some of the benefits include:

• Reduced Wear and Tear: Warmer air reduces the likelihood of condensation forming within the engine, which can lead to corrosion and other forms of wear.
• Consistent Performance: By maintaining a stable air temperature, the intake air heater helps ensure that the engine performs consistently, regardless of external temperature fluctuations.

Conclusion

The Cummins 3967275 Intake Air Heater plays a significant role in enhancing engine performance, facilitating easier starts, and contributing to the overall health of the engine system. Its integration with the air intake and air heater starting systems underscores its importance in modern engine design.