A Comprehensive Guide to Installing Cam Bearings for Small Block Chevy Engines

Installing cam bearings is a crucial step in rebuilding or modifying a small block Chevy (SBC) engine. These bearings provide support and alignment for the camshaft, ensuring smooth operation and optimal performance. This comprehensive guide will take you through the process of installing cam bearings in an SBC engine, providing detailed instructions and valuable tips to help you achieve a successful installation.

Table 1: Cam Bearing Specifications

Essential Tools and Materials

Before embarking on the installation process, gather the necessary tools and materials, including:

• Cam bearing installer tool
• Dial indicator
• Precision measuring tools (calipers, micrometers)
• Blue Loctite
• Engine assembly lubricant
• Clean rags

Step-by-Step Installation Instructions

1. Engine Preparation:

• Clean and inspect the engine block: Remove the camshaft and lifters, and thoroughly clean the bearing surfaces. Inspect the block for any damage or wear.

2. Cam Bearing Preparation:

• Lubricate the bearings: Apply a thin layer of engine assembly lubricant to the outer surface of the bearings.

3. Installing the Cam Bearings:

• Use the bearing installer tool: Place the selected bearing into the installer tool and center it over the bearing bore in the engine block.
• Drive in the bearing: Use a hammer to firmly drive the bearing into place. Ensure the bearing is fully seated and flush with the block surface.

4. Verifying Alignment:

• Set up the dial indicator: Mount the dial indicator on a magnetic base and position the probe tip on the bearing surface.
• Check for alignment: Rotate the engine crankshaft and observe the dial indicator reading. The bearing bore should be within 0.001-0.002 inches of true roundness.

5. Securing the Bearings:

• Apply Blue Loctite: Apply a small drop of Blue Loctite to the outer edge of the bearing.
• Install the camshaft: Carefully install the camshaft and torque the camshaft bolts to the specified torque value.

Table 2: Cam Bearing Installation Torque Values

Tips and Troubleshooting

• Use a dial indicator to measure the camshaft endplay. It should be within 0.003-0.008 inches.
• Ensure the bearing bores are clean and free of any debris or burrs.
• Lubricate the camshaft lobes and journals before installing the camshaft.
• If a bearing bore is out of round, it may need to be line bored.

Benefits of Installing Cam Bearings

Installing cam bearings offers numerous benefits, including:

• Reduced camshaft wear
• Improved engine performance
• Increased oil pressure
• Extended engine life

Costs and Considerations

The cost of cam bearings varies depending on the quality and brand. Generally, expect to pay between $50-$200 for a set of cam bearings.

Frequently Asked Questions

1. How often should cam bearings be replaced?

Replace cam bearings whenever the camshaft is replaced or if they show signs of wear.

2. Can I install cam bearings without removing the engine?

Yes, it is possible to install cam bearings in most SBC engines without removing the engine. However, it may be easier to remove the engine for access and visibility.

3. What are the symptoms of worn cam bearings?

Worn cam bearings can cause a variety of symptoms, including:

• Low oil pressure
• Cam bearing wear
• Camshaft misalignment
• Engine knocking

4. Can I install cam bearings myself?

Yes, it is possible to install cam bearings yourself with proper tools and knowledge. However, if you are not confident in your abilities, it is recommended to seek professional assistance.

5. How long does it take to install cam bearings?

The time required to install cam bearings depends on the experience of the installer and the engine configuration. Expect to spend several hours completing the process.

6. What is the significance of cam bearing clearance?

Proper cam bearing clearance ensures that the camshaft is adequately lubricated and that friction is minimized. Incorrect clearance can lead to camshaft wear and engine damage.

Conclusion

Installing cam bearings in an SBC engine is a critical step for ensuring the proper operation and longevity of the engine. By following the instructions and tips outlined in this guide, you can successfully perform the installation and enjoy the benefits of reduced camshaft wear, improved performance, and extended engine life. Remember to consult trusted sources and seek professional assistance if needed.