3939356
Starter Gasket
Cummins®

Introduction

The Cummins 3939356 Starter Gasket is a component designed to ensure the proper operation of commercial trucks. Its role is to create a seal between the starter motor and the engine block, which is vital for the efficient and reliable starting of the engine. This gasket is part of the broader system that ensures the truck’s engine performs optimally under various operating conditions ¹.

Basic Concepts of Starter Gaskets

A starter gasket functions as a seal between the starter motor and the engine block. Its primary role is to prevent the escape of engine fluids and gases, which could otherwise lead to inefficiencies or damage. By maintaining a secure seal, the gasket contributes to the overall performance and reliability of the truck’s engine system ².

Purpose of the 3939356 Starter Gasket

The Cummins 3939356 Starter Gasket plays a role in the operation of a truck by sealing the starter motor to the engine block. This seal is crucial for preventing leaks of engine fluids and gases, which could impair the starter motor’s function and the engine’s overall performance. The gasket ensures that the starter motor operates in a clean, dry environment, free from contaminants that could cause wear or failure ³.

Key Features

The Cummins 3939356 Starter Gasket is characterized by its material composition and design, which are tailored to enhance its performance and durability. Made from high-quality materials, this gasket is designed to withstand the high temperatures and pressures within the engine compartment. Its design ensures a tight fit and effective seal, contributing to the gasket’s longevity and reliability.

Benefits

Using the Cummins 3939356 Starter Gasket offers several advantages. It contributes to improved engine efficiency by ensuring a secure seal that prevents leaks. This, in turn, reduces the risk of engine damage and enhances the longevity of the starter motor. The gasket’s durable construction and effective sealing properties make it a valuable component for maintaining the truck’s performance and reliability.

Installation Process

Installing the Cummins 3939356 Starter Gasket requires careful attention to detail to ensure a secure fit. Preparatory steps include cleaning the mating surfaces of the starter motor and engine block to remove any debris or old gasket material. The installation process involves positioning the gasket correctly and securing it in place with the appropriate fasteners. Following manufacturer guidelines for torque specifications ensures the gasket is properly installed without over-tightening, which could damage the gasket or surrounding components.

Troubleshooting Common Issues

Common problems associated with starter gaskets include leaks or failure to seal properly. These issues can often be traced back to improper installation, wear and tear, or damage to the gasket. Troubleshooting steps may involve inspecting the gasket for signs of wear or damage, ensuring it is correctly installed, and replacing it if necessary. Regular maintenance and inspection can help identify potential issues before they lead to more significant problems.

Maintenance Tips

Maintaining the Cummins 3939356 Starter Gasket involves regular inspection to check for signs of wear or damage. It is advisable to inspect the gasket during routine engine maintenance or whenever the starter motor is serviced. Signs that the gasket may need replacement include visible cracks, tears, or evidence of leaks around the starter motor. Following the manufacturer’s recommendations for inspection intervals and replacement can help ensure the gasket continues to perform effectively.

Manufacturer Overview - Cummins

Cummins Inc. is a well-established company in the automotive industry, known for its commitment to producing high-quality components. With a history of innovation and excellence, Cummins has built a reputation for reliability and performance. The company’s dedication to quality is evident in its range of automotive components, including the Cummins 3939356 Starter Gasket, which is designed to meet the demanding requirements of commercial truck engines.

Cummins Starter Gasket 3939356 Compatibility

The Cummins Starter Gasket part number 3939356 is designed to fit a variety of Cummins engines, ensuring a secure seal between the starter and the engine block. This gasket is crucial for preventing leaks and maintaining the integrity of the engine’s starting system. Below is a detailed look at the engines compatible with this gasket, grouped where applicable for clarity.

ISC Series Engines

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250

The ISC series engines, ranging from the CM2150 to the CM850, benefit from the 3939356 gasket. These engines are known for their reliability and are used in a variety of applications, from agricultural to industrial machinery.

ISL Series Engines

• ISL CM2150
• ISL CM554
• ISL9 CM2150 SN
• ISL9 CM2250

The ISL series engines also utilize the 3939356 gasket. These engines are part of the larger ISL family, which is recognized for its high performance and efficiency. The SN and CM2250 variants are specifically designed for heavy-duty applications.

QSC Series Engines

• QSC8.3 CM2880 C102
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)
• QSC9 CM2250 / QSL9 CM2250

The QSC series engines, including the QSC8.3 and QSC9 models, are compatible with the 3939356 gasket. These engines are often used in construction and agricultural equipment, providing robust performance and durability.

QSL Series Engines

• QSL8.9 CM2150 L141
• QSL9 CM2250

The QSL series engines, specifically the QSL8.9 and QSL9 models, also fit the 3939356 gasket. These engines are designed for heavy-duty applications, ensuring reliable performance in demanding environments.

Other Cummins Engines

• 6B5.9
• 6C8.3
• B5.9 G
• C GAS PLUS CM556
• C8.3 G
• G8.3
• GTA8.3 CM558
• L8.9
• L8.9 CM2670 L134C
• L9.3 L105
• QSB5.9 30 CM550

The 3939356 gasket is also compatible with a range of other Cummins engines, including the 6B5.9, 6C8.3, and various L series engines. These engines are used in a variety of applications, from transportation to industrial machinery, and the gasket ensures a proper seal to maintain engine efficiency and longevity.

Role of Part 3939356 Starter Gasket in Engine Systems

The part 3939356 Starter Gasket is an essential component in ensuring the proper functioning and sealing of various engine systems. It is specifically designed to fit between the starting motor and the engine block, providing a secure and leak-proof connection.

Integration with Starting Motor Mounting

When the starting motor is mounted to the engine, the Starter Gasket plays a significant role in preventing any fluid leaks between the motor and the engine block. This is particularly important as the starting motor operates in close proximity to various engine fluids, including oil and coolant. The gasket ensures that these fluids do not seep into the starting motor, which could lead to malfunctions or damage.

Coordination with Lower Engine Gasket Kit

The Lower Engine Gasket Kit is a comprehensive set of gaskets designed to seal various lower engine components. The Starter Gasket works in conjunction with this kit to create a unified sealing system. By fitting precisely between the starting motor and the engine block, it complements the lower engine gaskets, ensuring that the entire lower section of the engine remains sealed against leaks.

Attachment and Mounting Considerations

During the attachment and mounting of the starting motor, the Starter Gasket must be correctly positioned to maintain the integrity of the seal. Improper installation can lead to leaks and potential engine damage. Therefore, it is important to follow the manufacturer’s guidelines for gasket placement and torque specifications during the mounting process.

Overall Engine Sealing

The Starter Gasket, as part of the overall engine sealing strategy, contributes to the maintenance of proper pressure and fluid levels within the engine. This is vital for the engine’s performance and longevity. By ensuring a tight seal, the gasket helps in maintaining the efficiency of the starting system and the overall engine operation.

Conclusion

The Cummins 3939356 Starter Gasket is a critical component in the operation of commercial truck engines, ensuring a secure seal between the starter motor and the engine block. Its proper installation and maintenance are essential for preventing leaks, maintaining engine efficiency, and ensuring the longevity of the starter motor. Regular inspection and adherence to manufacturer guidelines for installation and replacement are recommended to maximize the performance and reliability of this Cummins part.