3936058
Main Bearing Cap
Cummins®

The Cummins 3936058 Main Bearing Cap is a critical component for heavy-duty truck engines, designed to support the crankshaft and main bearings, thereby contributing to engine performance and longevity ³.

Basic Concepts of Main Bearing Caps

A Main Bearing Cap secures the main bearings within the engine block, providing a stable platform for the crankshaft to rotate smoothly. This interaction ensures proper alignment and support, which is essential for the engine’s balance and performance ².

Purpose of the Cummins 3936058 Main Bearing Cap

This Cummins part is engineered to support the crankshaft within the engine block, securing the main bearings to allow for minimal friction rotation. It maintains the precise alignment of the crankshaft, which is vital for the engine’s overall performance and durability ³.

Key Features

Constructed from high-quality materials, the 3936058 is designed to withstand the demanding conditions of heavy-duty truck engines. It features precise machining for a snug fit and robust construction to handle engine operation stresses, enhancing functionality and reliability ¹.

Benefits

Utilizing the 3936058 can lead to improved engine reliability and performance. Its design and material composition are tailored to endure heavy-duty use, potentially reducing the need for frequent replacements or repairs and leading to cost savings over time ³.

Installation Process

Installing this part requires careful attention to detail to ensure proper fitment and function. The process involves aligning the cap with the engine block, securing it in place, and torquing the fasteners to the manufacturer’s specifications. Following the installation instructions is crucial to maintain engine integrity and performance ².

Maintenance and Troubleshooting

Regular maintenance of the 3936058 includes inspecting for signs of wear or damage, such as cracks or deformation. Common issues may include improper torque, leading to bearing failure. Troubleshooting involves checking the cap’s fit and condition and addressing any issues promptly to prevent further engine damage ³.

Cummins Overview

Cummins Inc. is renowned in the automotive and heavy-duty truck industries for its engine and power generation products. The company’s history of innovation and quality ensures solutions that meet demanding application requirements.

Cummins Main Bearing Cap 3936058 Compatibility

The 3936058 is designed to fit various Cummins engines, ensuring a secure and reliable connection between the engine block and the crankshaft. This part is essential for maintaining engine structural integrity and reducing friction between moving parts.

Compatible Engines

• 6C8.3
• C GAS PLUS CM556
• C8.3 G
• G8.3
• ISC CM554
• ISL CM554
• QSB5.9 CM850
• QSC8.3 CM554
• QSL9 CM554

Grouping by Engine Series

• 6C8.3 Series

  • 6C8.3

• C Series

  • C GAS PLUS CM556
  • C8.3 G
  • G8.3

• ISC/ISL Series

  • ISC CM554
  • ISL CM554

• QSB/QSC/QSL Series

  • QSB5.9 CM850
  • QSC8.3 CM554
  • QSL9 CM554

Each of these engines benefits from the precision engineering of the 3936058, ensuring optimal performance and longevity.

Role of Part 3936058 Main Bearing Cap in Engine Systems

The Main Bearing Cap (part 3936058) is integral to the assembly and functionality of various engine systems. It secures the main bearings, essential for the smooth rotation of the crankshaft. Here’s how it integrates with different engine components:

Integration with the Cylinder Block

The cylinder block houses the main bearings and their corresponding caps. The main bearing cap is bolted to the cylinder block, ensuring that the main bearings remain firmly in position. This setup is vital for maintaining the alignment and balance of the crankshaft as it rotates within the engine.

Function in the Short Block and Long Block

In a short block configuration, which includes the cylinder block, crankshaft, pistons, and main bearings, the main bearing cap plays a key role in securing the crankshaft’s main bearings. In a long block, which additionally includes the cylinder head(s) and valvetrain, the main bearing cap continues to ensure the crankshaft’s stability and proper function.

Role in Crankshaft and Main Bearings

The main bearing cap directly interfaces with the crankshaft and main bearings. It provides the necessary support and rigidity required for the crankshaft to operate efficiently. Without a properly fitted main bearing cap, the crankshaft could experience excessive wear or misalignment, leading to potential engine failure.

Importance in Cylinder Block Kit and Repair Kit

When using a cylinder block kit or a repair kit, the main bearing cap is often included to ensure that the engine’s lower end is correctly assembled. It helps in maintaining the precision required for the crankshaft’s rotation, which is essential for the engine’s performance and longevity.

Usage in Software and Customer Interface

While the main bearing cap is a mechanical component, its proper installation and function can be monitored and diagnosed using engine management software and customer interfaces. These tools can provide real-time data on engine performance, helping mechanics ensure that the main bearing cap is performing as expected.

Conclusion

The Main Bearing Cap (part 3936058) is a fundamental component that ensures the integrity and performance of the engine’s lower end. It interacts closely with the cylinder block, crankshaft, and main bearings across various engine configurations, playing a crucial role in maintaining engine stability, balance, and efficiency.