Camshafts play a crucial role in an engine’s performance by controlling the timing of the valves. If you’re rebuilding an engine or installing a new camshaft, knowing how to degree a camshaft ensures that the valve timing is accurate, which can significantly affect power, efficiency, and engine longevity. Degreasing a camshaft is not about cleaning—it’s about aligning the camshaft correctly relative to the crankshaft to optimize engine performance.
In this guide, we’ll break down the tools, steps, and tips needed to degree a camshaft accurately for both beginners and experienced engine builders.
Why You Should Degree a Camshaft
Degreasing or properly aligning a camshaft is essential for several reasons:
- Optimized engine performance: Correct valve timing ensures maximum power and torque.
- Prevent engine damage: Misaligned camshafts can cause valves to contact pistons or improper combustion.
- Accurate tuning: Helps achieve consistent results when using aftermarket camshafts.
- Better fuel efficiency: Proper timing ensures efficient fuel combustion.
Skipping this step can result in poor engine performance or even costly damage.
Tools You’ll Need
Before you begin, gather the necessary tools:
- Cam degree kit (includes dial indicator and base)
- Degree wheel
- Bolt or camshaft holder
- Feeler gauge
- Wrenches and socket set
- Torque wrench
- Harmonic balancer removal tool (if necessary)
Having all the tools ready ensures a smooth and accurate process.
Step 1: Install the Camshaft and Timing Components
Start by installing the camshaft and related components:
- Place the camshaft in the engine block following the manufacturer’s instructions.
- Install timing gears, chain, or belt as per your engine type.
- Make sure all bolts are torqued to specifications.
Proper installation is crucial because any error here can affect the accuracy of your measurements.
Step 2: Mount the Degree Wheel
A degree wheel helps measure camshaft events relative to the crankshaft:
- Attach the degree wheel to the crankshaft using the harmonic balancer or crank bolt.
- Align the degree wheel so that zero degrees corresponds to top dead center (TDC) of the number one cylinder.
- Lock the crankshaft so it won’t rotate while setting up the dial indicator.
Accurate placement of the degree wheel is essential for precise camshaft alignment.
Step 3: Set Up the Dial Indicator
A dial indicator measures valve lift to find the cam’s precise position:
- Mount the dial indicator on a solid surface near the engine head.
- Position the tip on the valve or lifter you want to measure.
- Zero the dial indicator at the base circle of the camshaft (the lowest point of valve lift).
This setup ensures that your readings for valve lift are accurate.
Step 4: Rotate the Crankshaft and Measure Valve Lift
Now it’s time to measure:
- Slowly rotate the crankshaft clockwise.
- Watch the dial indicator and note the crankshaft degree when the valve reaches specific lift points (usually 0.050 inches for standard measurements).
- Compare readings to the camshaft specifications provided by the manufacturer.
These measurements show whether the camshaft is installed at the correct timing.
Step 5: Adjust Camshaft Timing if Necessary
If your measurements do not match the cam specs:
- Loosen the camshaft gear bolts slightly.
- Rotate the camshaft forward or backward to align the measurements with the specified intake and exhaust timings.
- Recheck the valve lift using the dial indicator.
Repeat the adjustment until the camshaft timing matches the manufacturer’s specifications.
Step 6: Double-Check All Measurements
Accuracy is critical:
- Rotate the crankshaft multiple times and take several readings.
- Check intake and exhaust lobe events for all cylinders.
- Ensure consistency across multiple measurements.
Double-checking prevents timing errors that could damage the engine.
Step 7: Finalize Installation
Once the camshaft is correctly degreed:
- Torque all camshaft and timing components to manufacturer specs.
- Reinstall the harmonic balancer, timing cover, and other components.
- Verify timing marks again after final assembly.
Proper final installation ensures that your camshaft will operate accurately under engine load.
Tips for Degreeing a Camshaft
- Always follow the camshaft manufacturer’s recommended lift and duration specifications.
- Use a quality dial indicator and degree wheel for precision.
- Take your time—rushing can lead to incorrect readings and engine damage.
- Keep a log of measurements to track adjustments.
- If unsure, consult a professional engine builder for guidance.
Following these tips ensures consistent and safe results.
Final Thoughts
Knowing how to degree a camshaft is essential for anyone serious about engine performance. Accurate camshaft timing improves power, efficiency, and longevity, while reducing the risk of mechanical failure. By carefully setting up your degree wheel, dial indicator, and adjusting timing according to specifications, you can ensure your engine performs at its best. Whether you’re
