4891179
Connecting Rod Cap Screw
Cummins®

The Cummins 4891179 Connecting Rod Cap Screw is a specialized component designed for use in heavy-duty truck engines. Its purpose is to secure the connecting rod cap to the connecting rod, ensuring the integrity of the connection between the piston and the crankshaft. This component plays a role in maintaining the structural stability and operational efficiency of the engine ¹.

Basic Concepts of Connecting Rod Cap Screws

Connecting rod cap screws are fasteners used to join the connecting rod cap to the connecting rod in an internal combustion engine. This connection is vital for the proper functioning of the engine, as it allows the piston’s linear motion to be converted into rotational motion of the crankshaft. The connecting rod cap screw must withstand high levels of stress and vibration, making its design and material important for engine performance and durability ².

Role of the 4891179 Connecting Rod Cap Screw in Truck Engines

The 4891179 Connecting Rod Cap Screw is specifically engineered to meet the demanding requirements of heavy-duty truck engines. It contributes to engine performance and reliability by ensuring a secure and stable connection between the connecting rod and the crankshaft. This stability is important for the efficient transfer of power from the piston to the crankshaft, which is fundamental to the engine’s operation ³.

Key Features of the 4891179 Connecting Rod Cap Screw

The design and material characteristics of the 4891179 Connecting Rod Cap Screw are tailored to enhance its functionality and durability. Crafted from high-strength materials, it is capable of withstanding the extreme conditions within a heavy-duty truck engine. Its design includes features that improve torque retention and resistance to loosening, which are important for maintaining the integrity of the connecting rod assembly over time.

Benefits of Using the 4891179 Connecting Rod Cap Screw

Utilizing the 4891179 Connecting Rod Cap Screw offers several advantages. These include improved engine efficiency due to the secure connection it provides, reduced maintenance requirements thanks to its durability, and enhanced overall performance of the engine. Its design and material contribute to a longer service life and greater reliability under the strenuous conditions typical of heavy-duty truck operations.

Troubleshooting and Maintenance Suggestions

To ensure optimal performance and longevity of the 4891179 Connecting Rod Cap Screw, it is important to be aware of common issues and their solutions. Regular inspection for signs of wear or damage, proper torque settings during installation, and adherence to manufacturer guidelines for maintenance can help prevent problems. Diagnostic procedures should include checking for proper torque, signs of fatigue, and any indications of loosening or damage to the screw or its threads.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and power generation products. With a strong reputation in the automotive and heavy-duty truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s extensive product range and focus on technological advancement make it a preferred choice for professionals in the industry.

Cummins Connecting Rod Cap Screw 4891179 Compatibility

The Cummins Connecting Rod Cap Screw part number 4891179 is a component in the assembly of various engine models. This screw is designed to secure the connecting rod cap to the connecting rod, ensuring stability and proper function of the engine. Below is a detailed description of the engines with which this part is compatible:

Cummins Diesel Engines

• 4B3.9
• 6B5.9
• B3.3
• B4.5 CM2350 B129B
• B4.5 RGT
• B5.6 CM2670 B152B
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• G5.9
• G5.9 CM558

Cummins Natural Gas Engines

• B5.9 GAS PLUS CM556

Cummins Diesel Engines with Cummins Filtration

• D4.0 CM2620 D103B

Cummins Diesel Engines with Cummins Filtration and Cummins Power Generation

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

Cummins Industrial Engines

• ISB (Chrysler)
• ISB CM2150
• ISB CM550

The Cummins Connecting Rod Cap Screw 4891179 is engineered to meet the stringent requirements of these engines, ensuring durability and reliability under various operating conditions. This part is integral to the engine’s performance and longevity, providing a secure connection that withstands the stresses of engine operation.

Role of Part 4891179 Connecting Rod Cap Screw in Engine Systems

The Part 4891179 Connecting Rod Cap Screw is integral to the assembly and operation of various engine components. It secures the connecting rod cap to the connecting rod, ensuring the structural integrity and proper function of the engine’s moving parts.

Integration with Engine Components

1. Cylinder Block and Short Block:

   • In both the cylinder block and short block configurations, the connecting rod cap screw plays a vital role. It ensures that the connecting rod is firmly attached to the crankshaft, allowing for smooth and efficient transfer of motion from the piston to the crankshaft.

2. Connecting Rod and Pistons:

   • The screw is essential in maintaining the connection between the connecting rod and the piston. This connection is fundamental for the reciprocating motion of the piston within the cylinder, which is a core function of the engine.

3. Camshaft and Injector Systems:

   • While the camshaft and injector systems operate independently of the connecting rod assembly, the stable and secure connection provided by the connecting rod cap screw ensures that the engine operates smoothly, indirectly supporting the timing and fuel injection processes.

4. Long Block and Long Block Kit:

   • In a long block or long block kit, which includes the cylinder block, crankshaft, pistons, and connecting rods, the connecting rod cap screw is a key component. It ensures that all these parts work in unison, contributing to the overall performance and reliability of the engine.

5. Short Block Kit and Performance Parts:

   • When using a short block kit or incorporating performance parts, the connecting rod cap screw remains a fundamental element. It ensures that any upgrades or modifications to the engine’s components are securely implemented, maintaining the engine’s balance and efficiency.

6. Various Short Block Configurations:

   • Across different short block configurations such as the short 6B block, short E2 block, and short E3 incentive block, the connecting rod cap screw is consistently important. It provides the necessary tension and security for the connecting rod assembly, regardless of the specific engine design.

Conclusion

In summary, the Part 4891179 Connecting Rod Cap Screw is a foundational component in various engine systems, ensuring the reliable operation and performance of the engine by securing the connecting rod to the crankshaft and piston. Its design and material characteristics are tailored to withstand the extreme conditions within heavy-duty truck engines, contributing to engine efficiency, durability, and overall reliability.