DIY Guide to Installing Cam Bearings in a Small Block Chevy (SBC)

Before you start any engine work, research and get the right tools and knowledge. Avoid making costly mistakes and ensure a successful installation.

Understanding Cam Bearings

Cam bearings are essential engine components that support the camshaft and allow it to rotate smoothly. They are typically made of bronze or aluminum and are pressed into the engine block. When installing cam bearings, accuracy and precision are paramount.

Tools and Materials Required

• Cam bearing installation tool
• Pry bar
• Mallet
• Measuring tape
• Dial indicator
• Bearing lubricant

Step-by-Step Installation Guide

Preparing the Engine Block

1. Clean the cam bearing bores: Remove any dirt, oil, or debris from the bores using a clean cloth and solvent.
2. Inspect the bores: Examine the bores for any damage or wear. If there are any problems, they must be addressed before installing the bearings.
3. Measure the bores: Ensure that the bores are within OEM specifications before proceeding.
4. Apply bearing lubricant: Lightly lubricate the inside of the bores using an assembly lube specifically designed for cam bearings.

Installing the Cam Bearings

1. Prepare the bearing installer: Adjust the installer tool to the correct bore diameter.
2. Lubricate the bearings: Apply a thin layer of assembly lube to the outer surface of the bearings.
3. Insert the bearing: Place a bearing in the installer tool and carefully guide it into the bore. Avoid touching the bearing with your hands.
4. Press in the bearing: Use the pry bar and mallet to gently tap on the installer until the bearing is fully seated in the bore.
5. Check the bearing: Use a dial indicator to confirm that the bearing is correctly centered and within specifications.

Repeat the Process

Repeat the installation process for all remaining cam bearings. Ensure that each bearing is installed correctly to prevent premature camshaft failure.

Tips and Troubleshooting

• Use a torque wrench: Follow the manufacturer's recommended torque specifications for installing the cam bearing caps. Overtightening can damage the bearings or block.
• Check the camshaft: After installing the bearings, check that the camshaft rotates smoothly without any binding. If there is excessive resistance, the bearings may be installed incorrectly.
• Use a dial indicator: A dial indicator is a valuable tool for ensuring that the bearings are properly centered and within tolerance.
• Inspect the bearings regularly: Cam bearings should be inspected periodically for wear or damage. Replace them if necessary.

Benefits of Installing New Cam Bearings

• Improved engine performance: New cam bearings reduce friction and allow the camshaft to operate more efficiently, resulting in increased horsepower and torque.
• Reduced engine noise: Worn cam bearings can cause a rattling or ticking noise. Installing new bearings can eliminate this noise and improve the overall sound of the engine.
• Extended engine life: Proper cam bearing installation extends the lifespan of the camshaft and other engine components by reducing wear and tear.

Cost of Cam Bearing Installation

The cost of cam bearing installation will vary depending on the type of engine and the labor rates of the shop. However, the average cost is between $200 and $500.

Conclusion

Installing cam bearings in a SBC is a crucial task that requires precision and attention to detail. By following the steps outlined in this guide, you can ensure that the bearings are properly installed and that your engine runs smoothly and efficiently for years to come.

Call to Action

If you are not confident in performing this installation yourself, consult a qualified mechanic. A professional can ensure that the job is done correctly, saving you time and hassle in the long run.

Stories To Relate

Story 1

Once, a mechanic was installing cam bearings in a customer's engine. He used the wrong size installer tool, which resulted in the bearings being installed incorrectly. The customer came back a few days later complaining of a loud knocking noise. The mechanic had to remove the camshaft and reinstall the bearings, costing the customer additional time and money.

Lesson: Always use the correct tools and follow the manufacturer's instructions.

Story 2

Another mechanic was installing cam bearings in a race engine. He lubricated the bearings with engine oil, which is not recommended for this application. The oil thinned out at high temperatures, causing the bearings to seize and the camshaft to break. The mechanic had to replace the camshaft, cam bearings, and several other engine components.

Lesson: Use the proper bearing lubricant.

Story 3

A third mechanic was installing cam bearings in a high-performance engine. He used a torque wrench to tighten the cam bearing caps, but he overtightened them. This caused the bearings to bind on the camshaft, making the engine difficult to start. The mechanic had to loosen the caps and retorque them to the correct specifications.

Lesson: Follow the manufacturer's recommended torque specifications.

Recommended Cam Bearing Installation Tools

Recommended Cam Bearings

Average Cost of Cam Bearing Installation