The Ultimate Guide to Installing SBC Cam Bearings: Step-by-Step Instructions

Installing new cam bearings is a critical step in rebuilding a classic small block Chevrolet (SBC) engine. Installing SBC cam bearings requires precision and attention to detail, but it can be accomplished with the right tools and a bit of know-how. In this article, we will provide a detailed guide on how to install SBC cam bearings, along with some tips and tricks to ensure a successful installation.

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Benefit: Improved Engine Performance

New cam bearings can significantly improve engine performance by reducing friction and wear on the camshaft. According to the Automotive Service Association, worn cam bearings can increase camshaft runout by as much as 0.005 inches, which can lead to premature camshaft failure. Installing new cam bearings can help to restore proper camshaft alignment and reduce friction, resulting in increased horsepower and torque.

How to:

• Inspect the camshaft bearing bores for any signs of wear or damage.
• Clean the bearing bores thoroughly with a solvent and a brush.
• Apply a thin layer of engine assembly lube to the new cam bearings.
• Carefully install the new cam bearings into the bearing bores, using a bearing driver tool.
• Ensure that the bearings are seated properly and flush with the block surface.

Table 1: Cam Bearing Specifications

Benefit: Reduced Noise and Vibration

Worn cam bearings can also lead to increased noise and vibration. As the camshaft rotates, it can cause the worn bearings to chatter, which can be transmitted to the rest of the engine. Installing new cam bearings can help to reduce noise and vibration, resulting in a smoother and quieter running engine.

How to:

• Use a dial indicator to measure the camshaft runout before and after installing new cam bearings.
• If the runout is within the manufacturer's specifications, the bearings are properly installed.
• If the runout is excessive, the bearings may need to be replaced or the bearing bores may need to be machined.

Table 2: Cam Bearing Installation Tools

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Effective Strategies

• Use the correct bearing size for your camshaft.
• Use a bearing driver tool to install the bearings.
• Apply a thin layer of engine assembly lube to the bearings.
• Ensure that the bearings are seated properly and flush with the block surface.

Tips and Tricks

• If the bearing bores are worn or damaged, they may need to be machined.
• Use a dial indicator to measure camshaft runout after installing new bearings.
• If the runout is excessive, the bearings may need to be replaced.

Common Mistakes to Avoid

• Installing the bearings without using a bearing driver tool.
• Using the wrong bearing size.
• Not applying engine assembly lube to the bearings.
• Not seating the bearings properly.

Getting Started

To get started with installing SBC cam bearings, you will need the following tools and materials:

• Bearing driver kit
• Dial indicator
• Engine assembly lube
• Solvent and brush
• New cam bearings
• Camshaft

Step-by-Step Approach

1. Inspect the camshaft bearing bores for any signs of wear or damage.
2. Clean the bearing bores thoroughly with a solvent and a brush.
3. Apply a thin layer of engine assembly lube to the new cam bearings.
4. Carefully install the new cam bearings into the bearing bores, using a bearing driver tool.
5. Ensure that the bearings are seated properly and flush with the block surface.
6. Measure the camshaft runout using a dial indicator.
7. If the runout is within the manufacturer's specifications, the bearings are properly installed.

FAQs About Installing SBC Cam Bearings

• What is the correct bearing size for my camshaft?
• The correct bearing size depends on the camshaft you are using. Refer to the camshaft manufacturer's specifications.
• How do I install the bearings?
• Use a bearing driver tool to install the bearings. Ensure that the bearings are seated properly and flush with the block surface.
• How do I measure camshaft runout?
• Use a dial indicator to measure camshaft runout. Place the dial indicator on the camshaft journal and rotate the camshaft. The runout will be displayed on the dial indicator.