3902343
Ring Dowel
Cummins®

The Cummins 3902343 Ring Dowel is a component designed for use in commercial trucks. It serves a specific function within the engine assembly, contributing to the overall performance and reliability of the vehicle. Understanding its purpose and operation is key to maintaining and troubleshooting truck engines effectively.

Basic Concepts of Ring Dowel

A ring dowel is a mechanical fastener used to align and secure components within an assembly. It typically consists of a cylindrical body with a flange at one or both ends. In engines and other machinery, ring dowels play a role in ensuring precise alignment between parts, which is vital for the efficient operation of the machinery ¹. They help maintain the correct spacing and orientation of components, which can affect performance and durability.

Role and Function of the 3902343 Ring Dowel

The Cummins 3902343 Ring Dowel is positioned within the engine assembly of commercial trucks. Its role is to provide accurate alignment between the engine block and other components, such as the cylinder head or turbocharger housing. By ensuring these parts are correctly aligned, the ring dowel contributes to the sealing integrity and operational efficiency of the engine. It interacts with other components by fitting into corresponding holes or recesses, securing parts in place without the need for additional fasteners.

Key Features

The Cummins 3902343 Ring Dowel is characterized by several key features that enhance its performance and durability. It is typically made from a durable material that can withstand the high temperatures and pressures within an engine environment. The design specifications of the ring dowel, including its diameter, length, and flange size, are tailored to fit precisely within the engine assembly. These specifications ensure that the ring dowel can effectively perform its alignment function without compromising the integrity of the engine components it connects.

Benefits

The use of the Cummins 3902343 Ring Dowel in truck engines offers several benefits. It improves alignment between engine components, which can lead to better sealing and reduced wear ². Enhanced stability provided by the ring dowel contributes to the overall efficiency and reliability of the engine. By ensuring components are correctly positioned, the ring dowel helps maintain optimal engine performance over time.

Troubleshooting and Maintenance

Common issues associated with ring dowels include misalignment due to wear or damage, which can affect engine performance. Troubleshooting these problems involves inspecting the ring dowel for signs of damage or deformation and ensuring it is correctly installed. Maintenance practices for the Cummins 3902343 Ring Dowel include regular inspection during engine service intervals and replacement if any wear or damage is detected. Proper installation and alignment are crucial to ensure the longevity and proper function of the ring dowel.

Compatibility with Cummins Engines

The Ring Dowel part 3902343, manufactured by Cummins, is compatible with various Cummins engine models, including:

• 4B3.9 and 6B5.9 Engines
• B3.9 G, B4.5, B4.5 RGT, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556
• B6.7 Engines (e.g., B6.7 CM2350 B135B, B6.7 CM2670 B153B)
• F3.8 F102 Engine
• G5.9 Engines (e.g., G5.9 CM558)
• ISB Engines (e.g., ISB CM2150, ISB CM550)

By ensuring that the Ring Dowel part 3902343 is correctly installed, engine performance can be maintained, and potential issues related to piston ring movement can be avoided.

Role of Part 3902343 Ring Dowel in Engine Systems

The part 3902343 Ring Dowel is an integral component in various engine systems, ensuring precise alignment and secure fitting of multiple parts. Its application spans across a wide range of engine configurations and assemblies.

In the Block 6-B Short, the Ring Dowel ensures the crankshaft is correctly positioned within the cylinder block, maintaining the necessary alignment for smooth engine operation. Similarly, in the Block Service and various Short Blocks such as the Short 4BT, Short 4BTA, Short 6BT, and Short E2 Incent, the Ring Dowel plays a key role in securing the crankshaft in place, which is essential for the engine’s durability and performance.

For the Core Assembly and Crankshaft and Bearings, the Ring Dowel facilitates the accurate placement of the crankshaft, reducing the risk of misalignment that could lead to increased wear or failure of the bearings. In the Cylinder Block and Cylinder Block Hardware Kit, it ensures that all components are correctly aligned, contributing to the overall structural integrity of the engine.

In the Cylinder Short Block and Engine Block, the Ring Dowel is vital for maintaining the precise spacing between the crankshaft and the cylinder walls, which is critical for the engine’s efficiency and longevity.

For the Long Block and Service Block, the Ring Dowel ensures that the crankshaft is securely fitted, allowing for optimal performance of the engine components. In specific configurations like the Short 6-B Block, Short E1 180 Block, Short E2 215/235 Block, and Short E2 Block, the Ring Dowel contributes to the accurate assembly of the engine, ensuring that all parts work in harmony.

Additionally, in turbocharged engines, such as those using the Turbocharger or Turbocharger Kit, the Ring Dowel helps in maintaining the alignment of the crankshaft, which is particularly important given the increased stress and performance demands placed on turbocharged engines.

Overall, the part 3902343 Ring Dowel is a fundamental component in ensuring the correct assembly and operation of various engine systems, contributing to their reliability and performance.

Conclusion

The Cummins 3902343 Ring Dowel plays a critical role in the alignment and secure fitting of engine components in commercial trucks. Its precise design and durable construction contribute to the overall efficiency, reliability, and performance of the engine. Regular maintenance and proper installation of this part are essential to ensure the longevity and optimal operation of the engine.