3973071
Threaded Plug
Cummins®

Introduction

The Threaded Plug 3973071 is a critical component manufactured by Cummins, specifically designed for use in commercial trucks. This article delves into the function, key features, benefits, and maintenance of this Cummins part, providing a comprehensive overview for professionals and enthusiasts alike.

Basic Concepts of Threaded Plugs

A threaded plug is a fastener with screw threads used to seal openings in various types of equipment. It is screwed into a threaded hole to prevent the passage of fluids or gases. Threaded plugs are essential in automotive and industrial applications for sealing unused ports or openings in systems, ensuring system integrity and preventing leaks ¹.

Purpose of Threaded Plug 3973071

The Threaded Plug 3973071 by Cummins is utilized in commercial trucks to seal specific openings within the engine or other systems. Its primary role is to prevent leaks of fluids or gases, maintain system integrity, and ensure the proper operation of the truck’s components ².

Key Features

• Constructed from durable materials to withstand high pressure and temperature.
• Designed to provide a secure seal in threaded openings.
• Compatible with specific Cummins engine models and systems.
• Easy to install and remove when necessary.

Benefits

• Enhances system reliability by preventing leaks.
• Contributes to maintaining optimal performance of the truck’s engine and systems.
• Reduces the risk of contamination by sealing off openings ³.

Troubleshooting and Maintenance

Regular inspection of the threaded plug is recommended to ensure it remains securely in place and provides an effective seal. If leaks are detected, the plug should be checked for proper installation and condition. Replacement may be necessary if the plug is damaged or worn.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. The company is renowned for its commitment to quality and innovation in the automotive and industrial sectors.

Compatibility with Cummins Engines

The Cummins Threaded Plug part number 3973071 is designed to fit a variety of Cummins engines, ensuring a secure and reliable seal in various applications. This plug is engineered to meet the stringent standards required for high performance and durability in demanding environments.

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B3.9 G
• B4.5
• B5.6 CM2670 B152B
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• C GAS PLUS CM556
• C8.3 G
• G5.9
• G8.3
• ISB (Chrysler)
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB3.9 CM2220 B107
• ISB5.9 CM2880 B127
• ISB5.9G CM2180
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

Grouping of Compatible Engines

The compatibility of the threaded plug with various Cummins engines can be grouped based on their specifications and applications:

Smaller Displacement Engines

• 4B3.9
• B3.9 G
• B4.5
• B5.6 CM2670 B152B
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556
• G5.9

Medium Displacement Engines

• 6B5.9
• 6C8.3
• C8.3 G
• G8.3
• ISB (Chrysler)
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB3.9 CM2220 B107
• ISB5.9 CM2880 B127
• ISB5.9G CM2180

Larger Displacement Engines

• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• C GAS PLUS CM556
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

This grouping helps in understanding the range of applications where the threaded plug can be effectively utilized, ensuring compatibility across different engine sizes and configurations.

Role of Part 3973071 Threaded Plug in Engine Systems

In the context of engine systems, the Threaded Plug 3973071 serves a significant function in maintaining the integrity and efficiency of various components. When integrated into a Long Block assembly, this threaded plug is typically used to seal specific passages or openings, ensuring that fluids and gases remain within their designated pathways. This is particularly important in preventing oil leaks or the escape of combustion gases, which could otherwise lead to performance issues or engine damage.

Within a Long Block Kit, the threaded plug complements other components by providing a secure seal at critical points. Its role is to maintain the pressurized environment necessary for optimal engine operation.

In the Oil Pan and Oil Pan Kit, the Threaded Plug 3973071 is often employed to seal openings where sensors or other components may be installed or removed. This ensures that the oil pan remains a closed system, preventing oil loss and contamination.

During the Oil Pan Mounting process, ensuring that all seals, including those provided by threaded plugs, are intact is essential. This step is vital for the overall stability and functionality of the oil pan, as it directly impacts the engine’s lubrication system.

The Pan Oil Mounting procedure also benefits from the use of threaded plugs. These plugs help in securing the oil pan to the engine block while maintaining a seal against any potential leaks. This is important for the consistent performance of the lubrication system, which is fundamental to the engine’s longevity and efficiency.

Conclusion

The Threaded Plug 3973071 by Cummins plays a supportive yet essential role in various engine components, ensuring seals are maintained, and systems operate efficiently. Its application across different engine assemblies underscores its versatility and importance in engine maintenance and performance.