3930139
Piston Cooling Nozzle
Cummins®

The Piston Cooling Nozzle 3930139, manufactured by Cummins, is a component designed for use in heavy-duty truck engines. Cummins, a well-established name in the automotive and heavy-duty truck industry, produces a range of parts and systems aimed at enhancing engine performance and reliability. This Cummins part is significant in this context as it contributes to the efficient operation and longevity of truck engines by aiding in the cooling process ¹.

Function and Operation of Piston Cooling Nozzles

Piston cooling nozzles operate on the principle of directing a stream of engine oil onto the underside of the piston to dissipate heat. This process is vital for maintaining the structural integrity and performance of the piston, especially under high-stress conditions typical in heavy-duty truck engines. By effectively managing heat, these nozzles help in preserving the engine’s efficiency and reliability over time ².

Purpose of the 3930139 Piston Cooling Nozzle

The 3930139 Piston Cooling Nozzle is specifically designed to enhance the cooling of pistons within a truck engine. Its role is to spray oil onto the piston’s underside, which absorbs heat and then carries it away, thus maintaining optimal operating temperatures. This contributes to the engine’s overall efficiency and extends its operational lifespan by reducing thermal stress on the piston.

Key Features of the 3930139 Piston Cooling Nozzle

The 3930139 Piston Cooling Nozzle boasts several design and construction features that enhance its performance and reliability. These include a precision-engineered nozzle tip for accurate oil spray, robust materials resistant to high temperatures and pressures, and a design that ensures compatibility with Cummins engines. These features work together to provide effective cooling and durability.

Benefits of Using the 3930139 Piston Cooling Nozzle

Utilizing the 3930139 Piston Cooling Nozzle offers several advantages. It provides improved engine cooling, which is crucial for maintaining engine efficiency under demanding conditions. Additionally, the enhanced cooling contributes to increased durability of the engine components, particularly the pistons, leading to a longer engine lifespan. Overall, the nozzle plays a significant role in enhancing the engine’s performance and reliability.

Installation and Integration

Proper installation and integration of the 3930139 Piston Cooling Nozzle within a truck engine are crucial for its effective operation. It is important to follow manufacturer guidelines to ensure the nozzle is correctly positioned and securely fastened. This includes verifying compatibility with the engine model and ensuring the oil supply to the nozzle is adequate and unobstructed.

Troubleshooting Common Issues

Common issues associated with piston cooling nozzles may include clogging, misalignment, or wear and tear. Troubleshooting these problems involves checking the nozzle for blockages, ensuring it is correctly aligned with the piston, and inspecting for signs of damage or excessive wear. Addressing these issues promptly can help maintain the efficiency and reliability of the engine cooling system.

Maintenance Recommendations

Routine maintenance of the 3930139 Piston Cooling Nozzle is key to ensuring its continued optimal performance. This includes regular inspections for signs of wear, ensuring the nozzle is clean and free from obstructions, and verifying that the oil supply is consistent and adequate. Following these best practices can help prevent issues and extend the lifespan of the nozzle.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the automotive and heavy-duty truck industry for producing high-quality, reliable, and efficient products. Their extensive product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of various applications.

Piston Cooling Nozzle 3930139 Compatibility with Cummins Engines

The Cummins Piston Cooling Nozzle part number 3930139 is designed to fit a variety of Cummins engine models. This part is crucial for maintaining optimal engine performance by ensuring efficient cooling of the pistons. Below is a detailed look at the compatibility of this nozzle with various Cummins engines:

Compatible Engines

• 4B3.9
• 6B5.9
• B3.9 G
• B5.9 G
• B5.9 GAS PLUS CM556
• ISB CM550
• QSB5.9 44 CM550
• QSB5.9 CM550

Grouped Compatibility

The engines listed can be grouped based on their series and specifications:

1. B Series Engines

   • B3.9 G
   • B5.9 G
   • B5.9 GAS PLUS CM556

2. 4B and 6B Series Engines

   • 4B3.9
   • 6B5.9

3. QSB Series Engines

   • QSB5.9 44 CM550
   • QSB5.9 CM550

4. ISB Series Engines

   • ISB CM550

Each of these engines, despite their differences in series and specifications, relies on the efficient cooling provided by the Piston Cooling Nozzle 3930139 to maintain operational integrity and longevity.

Role of Part 3930139 Piston Cooling Nozzle in Engine Systems

The Piston Cooling Nozzle (part 3930139) is an integral component in various engine systems, designed to enhance the performance and longevity of the engine by managing thermal loads on the piston. Here’s how it integrates with the provided components:

Integration with Engine Blocks and Short Blocks

• Engine Block and Short Block: The piston cooling nozzle is typically installed within the engine block or short block. It sprays a fine mist of oil directly onto the underside of the piston, effectively reducing the temperature and preventing overheating. This is particularly important in high-performance or high-stress environments where the engine block endures significant thermal loads.

• Short 6BT Block, Short E2 Block, Short E3 Block: In these configurations, the piston cooling nozzle plays a significant role in maintaining optimal operating temperatures. By ensuring that the pistons remain cool, it helps in preserving the integrity of the cylinder block and associated components, such as the crankshaft and bearings.

Interaction with Cylinder and Piston Components

• Cylinder and Piston: The direct oil spray from the piston cooling nozzle helps in reducing friction and wear between the piston and the cylinder wall. This is essential for the longevity of the cylinder block and the piston itself, ensuring smooth operation and efficiency.

Role in Overhaul and Rebuild Kits

• Overhaul Kit and Rebuild Kit: When an engine undergoes a major overhaul or rebuild, the piston cooling nozzle is often included in these kits. Its presence ensures that the newly assembled engine will have effective piston cooling, which is vital for the engine’s reliability and performance post-rebuild.

Contribution to Lower Engine Gasket Sets

• Lower Engine Gasket Kit and Lower Engine Gasket Set: The installation of the piston cooling nozzle necessitates precise alignment and sealing, which is facilitated by the lower engine gasket set. Proper sealing around the nozzle ensures that the oil spray is directed accurately and efficiently, maximizing its cooling effect.

Support in Cylinder Block Hardware and Kits

• Cylinder Block Hardware Kit and Cylinder Block Kit: These kits often include provisions for the piston cooling nozzle, ensuring that all necessary mounting points and passages are correctly configured. This integration is vital for the nozzle to function correctly within the cylinder block.

Enhanced Performance in Specific Block Configurations

• Short 6B Block, Short E1 180 Block, Short E2 215/235 Block: In these specific block configurations, the piston cooling nozzle contributes to enhanced engine performance by maintaining lower piston temperatures. This is particularly beneficial in high-rpm or high-load applications where thermal management is key to engine durability.

Conclusion

In summary, the Piston Cooling Nozzle 3930139 is a specialized component that works in concert with various engine blocks, cylinder components, and overhaul kits to ensure optimal thermal management, thereby enhancing the overall performance and reliability of the engine. Its role in maintaining the structural integrity and efficiency of the piston under high-stress conditions is crucial for the longevity and reliability of heavy-duty truck engines.