3931349
Flange Gasket
Cummins®

The Cummins 3931349 Flange Gasket is a critical component designed to maintain the integrity of seals in commercial truck engines. Its role is significant in maintaining the operational efficiency of trucks by preventing leaks and ensuring that systems operate under the correct pressure conditions ¹.

Basic Concepts of Flange Gaskets

Flange gaskets are sealing devices placed between two or more mating flanges to prevent leakage from a static joint. They operate by filling the space between the flanges, compensating for surface imperfections, and withstanding the pressure and temperature of the system they are part of. In mechanical systems, flange gaskets are essential for maintaining the seal integrity of pipes, valves, and other components ².

Purpose of the Cummins 3931349 Flange Gasket

The Cummins 3931349 Flange Gasket is specifically designed to fit within the truck’s engine system, where it plays a role in sealing connections between components. Its placement is typically at joints where pressure and temperature variations occur, ensuring that fluids or gases do not escape, which could lead to system inefficiencies or failures ³.

Key Features

This part is constructed from materials that offer resistance to high temperatures and pressures, commonly including composite materials that provide durability and flexibility. Its design characteristics include a specific thickness and outer diameter tailored to fit precisely within the truck’s engine system, enhancing its sealing capabilities ⁴.

Benefits

Utilizing the Cummins 3931349 Flange Gasket offers several advantages, such as enhanced sealing efficiency, which contributes to the overall performance and reliability of the truck. Its durable construction ensures longevity, reducing the frequency of replacements and maintenance costs associated with gasket failures ⁵.

Installation Process

Installing the Cummins 3931349 Flange Gasket requires careful preparation of the flange surfaces to ensure they are clean and free from debris. The gasket should be positioned correctly between the flanges, and the connection should be tightened according to the manufacturer’s specifications to achieve the proper seal without damaging the gasket ⁶.

Common Issues and Troubleshooting

Issues with the Cummins 3931349 Flange Gasket may include leaks or wear over time. Troubleshooting these problems involves inspecting the gasket for signs of damage, ensuring the flanges are properly aligned and tightened, and replacing the gasket if necessary to restore the seal integrity ⁷.

Maintenance Tips

Regular maintenance of the Cummins 3931349 Flange Gasket involves periodic inspections for signs of wear or damage. Replacement guidelines suggest inspecting the gasket during routine engine maintenance checks and replacing it if any degradation is observed to prevent potential leaks and ensure continued system efficiency ⁸.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a broad product range that includes diesel and natural gas engines, as well as related technologies, Cummins has established a reputation for quality and reliability in the commercial truck industry ⁹.

Cummins Flange Gasket 3931349 Compatibility

The Cummins Flange Gasket part number 3931349 is designed to fit a variety of Cummins engines, ensuring a secure seal where the flange connects to other components. This gasket is crucial for maintaining the integrity of the engine’s sealing system, preventing leaks and ensuring optimal performance.

Compatible Engines

• 4B3.9 and 6B5.9 Engines: Medium-duty diesel engines where the gasket provides a reliable seal essential for maintaining engine efficiency and preventing leaks.
• B3.9 G and B5.9 G Engines: Gas-powered variants within Cummins’ engine portfolio, ensuring proper sealing for overall performance and longevity.
• B5.9 GAS PLUS CM556 Engine: A high-performance gas engine where the gasket provides a robust seal that can withstand the demands of high-performance operation.
• G5.9 Engine: Another variant in Cummins’ gas engine series, ensuring proper sealing and efficient engine operation.
• ISB CM550 and ISB CM850 Engines: Part of Cummins’ Industrial Series Engines (ISB), known for their durability and performance, where the gasket provides a reliable seal.
• ISB5.9G CM2180 Engine: A high-performance variant within the ISB series, ensuring proper sealing and peak engine performance.
• QSB5.9 44 CM550 and QSB5.9 CM850 Engines: Part of Cummins’ Quanti-Shift Series, known for their versatility and efficiency, where the gasket provides a reliable seal.

Role of Part 3931349 Flange Gasket in Engine Systems

The Flange Gasket, identified by part number 3931349, is integral to the assembly and functionality of various engine components. In the context of a Lower Engine Gasket Kit or Lower Engine Gasket Set, this gasket ensures a secure seal between the engine block and the oil pan, preventing oil leaks and maintaining the integrity of the lubrication system.

When incorporated into an Oil Pan Kit or Oil Pan Service Kit, the Flange Gasket plays a pivotal role in creating a tight seal around the oil pan flange. This is essential for retaining engine oil within the sump and ensuring that the oil circulation system operates efficiently.

In an Overhaul Kit or Rebuild Kit, the Flange Gasket is a fundamental component that contributes to the reassembly process of the engine. It ensures that all mating surfaces between the engine block and the oil pan are properly sealed, which is vital for the engine’s performance and longevity.

Additionally, within the Pan, Oil system, the Flange Gasket is responsible for maintaining the oil reservoir’s integrity. It prevents oil from escaping, which could lead to insufficient lubrication and potential engine damage.

Overall, the Flange Gasket (part 3931349) is a key element in ensuring that engine components function seamlessly together, providing reliable performance and protection against oil leaks.

Conclusion

The Cummins 3931349 Flange Gasket is a vital component in maintaining the efficiency and reliability of commercial truck engines. Its proper installation, maintenance, and replacement are essential for preventing leaks and ensuring optimal engine performance. Regular inspections and adherence to manufacturer guidelines are recommended to maximize the lifespan and effectiveness of this Cummins part.