Mastering the Art of Cam Degreeing- A Comprehensive Guide to Engine Performance Enhancement

How to Degree a Cam

Cams are essential components in many mechanical systems, particularly in engines where they are used to control the opening and closing of valves. Degreeing a cam, or adjusting its timing, is a crucial step in ensuring that the camshaft operates in harmony with the engine’s other components. This article will guide you through the process of how to degree a cam, highlighting the key steps and considerations to ensure optimal performance.

Understanding the Basics

Before diving into the actual process, it’s important to understand the basics of a cam. A cam is a rotating machine element with a profile that controls the movement of another part, such as a valve. The cam profile is designed to produce a specific motion, which can be linear or rotational, depending on the application. Degreeing a cam involves adjusting its position within the engine to achieve the desired valve timing.

Tools and Equipment

To degree a cam, you will need a few essential tools and equipment. These include a cam degreeing tool, a dial indicator, a timing light, a cam lock tool, and a set of feeler gauges. The cam degreeing tool is used to hold the cam in place while you make adjustments, while the dial indicator measures the cam’s position. The timing light and feeler gauges are used to verify the timing and clearance settings.

Step-by-Step Guide

1.

Identify the TDC Position

Start by identifying the top dead center (TDC) position of the engine. This is the point where the piston is at the highest point in its cylinder. Use the timing light to find the TDC position and mark it on the engine block.

2.

Install the Cam Degreeing Tool

Attach the cam degreeing tool to the camshaft. This tool will allow you to rotate the cam while holding it in place. Ensure that the tool is securely fastened to prevent any movement during the process.

3.

Set the Cam Position

Adjust the cam position to the desired intake and exhaust valve opening and closing points. This can be found in the engine’s service manual or by consulting with a professional. Use the dial indicator to measure the cam’s position and make adjustments as needed.

4.

Check Valve Clearance

Once the cam position is set, check the valve clearance using feeler gauges. Ensure that the clearance is within the manufacturer’s specifications to prevent engine damage.

5.

Lock the Cam

After verifying the cam position and valve clearance, use the cam lock tool to secure the cam in place. This will prevent any movement while the engine is running.

6.

Verify the Timing

Use the timing light to verify that the cam is properly timed. Ensure that the intake and exhaust valves are opening and closing at the correct intervals.

Conclusion

Degreeing a cam is a critical step in ensuring optimal engine performance. By following this step-by-step guide and using the proper tools and equipment, you can successfully degree a cam and achieve the desired valve timing. Always refer to the engine’s service manual for specific instructions and guidelines, and consult with a professional if needed.