3683670
Grommet Seal
Cummins®

The 3683670 Grommet Seal, manufactured by Cummins, is a critical component designed for use in commercial trucks. It ensures a secure and leak-proof seal in various engine systems, maintaining system integrity and efficiency.

Basic Concepts of Grommet Seals

Grommet seals are essential in automotive applications to prevent leaks and protect cables and wires. They are installed in openings where wires or pipes pass through, creating a tight seal that prevents the ingress of moisture, dust, and other contaminants. This ensures the integrity and functionality of the electrical and fluid systems within a vehicle ¹.

Purpose of Grommet Seal 3683670

The 3683670 Grommet Seal is specifically designed to seal openings in commercial trucks where cables, wires, or pipes pass through. It provides a secure seal that prevents the entry of contaminants and ensures that the systems connected by these cables and pipes operate reliably. This seal is particularly important in harsh environments, such as extreme temperatures, moisture, and dirt ².

Key Features

This Cummins part features several characteristics that enhance its performance. It is composed of durable materials that can withstand the rigors of commercial truck use. The design ensures a tight fit around cables and pipes, providing effective sealing. Additionally, the seal is engineered to be resistant to environmental factors, ensuring long-term reliability.

Benefits

The 3683670 Grommet Seal offers several benefits. It contributes to improved system reliability by preventing leaks and protecting cables and wires from environmental damage. This protection extends the longevity of connected components and reduces the need for frequent maintenance. Furthermore, the seal helps maintain the efficiency of the truck’s systems by ensuring that they are not compromised by external contaminants ³.

Troubleshooting and Maintenance

Common issues with grommet seals include wear and tear or improper installation. Regular inspection of the 3683670 Grommet Seal can help identify these issues early. Maintenance tips include ensuring that the seal is properly installed and checking for signs of damage or wear. Replacing the seal when necessary will help maintain its effectiveness and the integrity of the systems it protects.

Compatibility with Cummins Engines

ISM Series Engines

The ISM CM570/870 and ISM CM876 engines benefit from the 3683670 Grommet Seal in their sealing applications. This part helps maintain the integrity of the engine’s sealing system, ensuring that there are no leaks that could compromise engine performance or efficiency.

ISX Series Engines

For the ISX CM871, ISX15 CM2250, and ISX15 CM2350 X101 engines, the 3683670 Grommet Seal is integral to maintaining the sealing integrity of the engine. This part is crucial in preventing leaks and ensuring that the engine operates at optimal efficiency.

QSX Series Engines

The QSX15 CM2250, QSX15 CM2250 ECF, and QSX15 CM2350 X105 engines also utilize the 3683670 Grommet Seal. This part ensures that the sealing system remains intact, which is vital for the proper functioning of these engines.

X15 Series Engines

The X15 CM2350 X116B, X15 CM2350 X123B, and X15 CM2450 X134B engines incorporate the 3683670 Grommet Seal to maintain the sealing integrity of the engine. This part is essential for preventing leaks and ensuring that the engine operates efficiently.

QSM Series Engine

The QSM11 CM876 engine also relies on the 3683670 Grommet Seal to maintain its sealing system. This part is crucial for ensuring that the engine operates without leaks, maintaining its performance and efficiency.

Grommet Seal Component Usage

The 3683670 Grommet Seal is instrumental in maintaining the integrity and efficiency of various engine components. It is specifically designed to create a secure seal, preventing leaks and ensuring optimal performance.

Cover Components

In the cover components, such as the front gear cover, valve cover, gear cover, rocker lever cover, and valve cover, the Grommet Seal plays a significant role. It ensures that these covers remain sealed against the engine block or head, preventing oil and other fluids from escaping. This seal is particularly important in the valve cover, where it helps maintain consistent oil levels for lubricating the valve train. Similarly, in the front gear cover, it prevents gear lubricant from leaking, which is essential for the smooth operation of the timing gears.

Gear and Valve Systems

For the gear systems, the Grommet Seal ensures that the gear housings remain pressurized with the appropriate lubricants. This is vital for reducing friction and wear on the gear teeth, contributing to the longevity and reliability of the engine’s timing system.

In the valve systems, the seal provided by the Grommet Seal in the valve cover is essential for maintaining the correct oil pressure. This pressure is necessary for the proper functioning of hydraulic lifters and other valve train components, ensuring that valves open and close at the precise moments required for efficient combustion.

Rocker Lever Cover

The rocker lever cover also benefits from the Grommet Seal by keeping the environment around the rocker arms clean and free from contaminants. This seal helps in maintaining the precise clearances between the rocker arms and the valve stems, which is critical for the accurate transfer of motion from the camshaft to the valves.

Conclusion

In summary, the 3683670 Grommet Seal is a fundamental component in ensuring that various engine covers and systems operate efficiently and reliably by providing essential seals that prevent fluid leaks and maintain necessary pressures and clearances.