SBC Cam Bearing Installation: A Comprehensive Guide for Enhanced Performance

Introduction

Small block Chevrolet (SBC) engines are widely renowned for their versatility and performance capabilities. Installing new cam bearings is a crucial step in optimizing the engine's performance and longevity. This article provides a comprehensive guide for installing cam bearings in an SBC engine, covering every aspect from preparation to final assembly.

Materials Required

Before embarking on the installation process, it is essential to gather the necessary materials:

• New cam bearings
• Cam bearing installer
• Engine block
• Camshaft
• Lubricant
• Torque wrench
• Feeler gauge

Preparation

1. Cleaning and Inspection:

Thoroughly clean the engine block and camshaft to remove any dirt, grease, or debris. Inspect the cam bearing bores for any damage or wear.

2. Bearing Sizing:

Use a micrometer to measure the diameter of the camshaft journals and the cam bearing bores. The cam bearings should have a slightly larger diameter than the camshaft journals to ensure a snug fit.

Installation

1. Lubrication:

Apply a thin layer of lubricant to the camshaft journals and the cam bearing bores. This will help reduce friction during installation.

2. Cam Bearing Installer:

Install the cam bearing installer onto the camshaft journal. Align the installer with the corresponding cam bearing bore in the engine block.

3. Bearing Insertion:

Carefully insert the cam bearing into the bore. Use the cam bearing installer to gently tap the bearing into place.

4. Flush Bearings:

Once all cam bearings are installed, use a clean cloth to flush out any excess lubricant from the camshaft journals and bearing bores.

Cam Installation

1. Lubrication:

Apply a generous amount of lubricant to the camshaft cam lobes and bearing surfaces.

2. Cam Placement:

Carefully place the camshaft into the engine block. Make sure that the camshaft timing is correct in relation to the crankshaft.

3. Torque Cam Bearings:

Install the camshaft thrust plate and bolts. Torque the bolts to the manufacturer's specifications.

Post-Installation Checks

1. Bearing Clearance:

Use a feeler gauge to check the clearance between the camshaft journals and the cam bearings. The ideal clearance should be between 0.001" and 0.002".

2. Cam Rotation:

Rotate the camshaft by hand to ensure it rotates smoothly without any binding or excessive resistance.

Benefits of Installing New Cam Bearings

• Improved Oil Flow: New cam bearings provide a smoother surface for the camshaft to rotate on, which allows for better oil flow to the camshaft journals and lobes.
• Reduced Friction: Snug-fitting cam bearings minimize friction between the camshaft and the engine block, resulting in reduced wear and tear.
• Increased Power: Optimized cam bearing installation reduces friction and improves oil flow, which ultimately translates into increased engine power.

Potential Drawbacks

• Cost: Installing new cam bearings can be a time-consuming and expensive process, especially if the engine block requires machining or resurfacing.
• Specialized Tools: The proper tools, such as a cam bearing installer, are necessary for a successful installation.
• Complexity: Incorrectly installed cam bearings can cause serious engine damage. It is recommended to have a qualified mechanic perform the installation.

Comparison of Pros and Cons

FAQs

1. How often should cam bearings be replaced?

Cam bearings typically have a lifespan of around 50,000 to 100,000 miles. However, factors such as driving conditions and engine maintenance can affect their longevity.

2. Can I install cam bearings myself?

While it is possible to install cam bearings yourself, it is recommended to have a qualified mechanic perform the task. Incorrectly installed cam bearings can cause severe engine damage.

3. What type of lubricant should I use for cam bearings?

Use a high-quality engine assembly lubricant specifically designed for camshaft installations.

### Humorous Stories

Story 1:

A mechanic accidentally installed the cam bearings upside down. When he started the engine, it sounded like a bag of marbles being shaken.

Lesson: Pay attention to the orientation of the cam bearings before installing them.

Story 2:

A customer brought his engine to a shop complaining of a knocking noise. The mechanic discovered that the cam bearings were loose because the bolts were not torqued properly.

Lesson: Always torque the camshaft bolts to the manufacturer's specifications.

Story 3:

A mechanic installed new cam bearings but forgot to flush out the excess lubricant. When he started the engine, it spewed oil all over the engine bay.

Lesson: Remember to flush out any excess lubricant after installing cam bearings.

Conclusion

Installing new cam bearings in an SBC engine is a crucial maintenance task that can significantly improve engine performance and longevity. By following the steps outlined in this guide, you can ensure a successful and trouble-free installation. Remember to seek professional assistance if you are not confident in your mechanical abilities.