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The .4 HEMI cam swap is a popular upgrade among automotive enthusiasts looking to enhance the performance of their vehicles. By utilizing Mopar OEM parts, you can achieve a significant power boost, reaching up to 520 horsepower. This article provides a step-by-step guide to help you through the process of swapping the cam in your .4 HEMI engine.
Understanding the .4 HEMI Engine
The .4 HEMI engine, known for its hemispherical combustion chamber design, offers a unique combination of power and efficiency. The engine’s architecture allows for better airflow and combustion, making it an ideal candidate for performance upgrades.
- Engine displacement: 5.7L or 6.4L
- Power output: Stock ranges from 345 hp to 485 hp
- Aftermarket potential: High with cam swaps and other modifications
Benefits of a Cam Swap
Upgrading the camshaft in your .4 HEMI engine can lead to several benefits, including:
- Increased horsepower and torque
- Improved throttle response
- Enhanced engine sound
- Better performance at higher RPMs
Required Tools and Parts
Before starting the cam swap, gather the necessary tools and parts to ensure a smooth process. Here’s a list of what you will need:
- Mopar OEM camshaft
- Camshaft installation tool
- Torque wrench
- Socket set
- Engine oil
- Gasket set
- Timing chain or belt (if applicable)
Step-by-Step Cam Swap Process
Step 1: Preparation
Begin by disconnecting the battery and ensuring that the vehicle is on a level surface. Gather all your tools and parts, and review the service manual for your specific engine model.
Step 2: Remove Engine Covers
Carefully remove any plastic engine covers to gain access to the camshaft. Keep track of all screws and fasteners for reassembly.
Step 3: Remove the Intake Manifold
Next, disconnect any sensors, hoses, and wiring connected to the intake manifold. Remove the bolts securing the manifold and lift it off to expose the cylinder heads.
Step 4: Remove the Valve Covers
Unbolt the valve covers and gently remove them. This will allow you to access the rocker arms and pushrods.
Step 5: Remove Rocker Arms and Pushrods
Carefully remove the rocker arms and pushrods, ensuring that you keep them in order for reinstallation. Labeling them can help maintain their original positions.
Step 6: Remove the Old Camshaft
With the rocker arms and pushrods out of the way, you can now remove the old camshaft. Use the camshaft installation tool to help slide it out smoothly.
Step 7: Install the New Camshaft
Carefully insert the new Mopar OEM camshaft into the engine, ensuring it is aligned correctly. Follow the manufacturer’s instructions for proper installation.
Step 8: Reassemble the Engine
Reinstall the pushrods and rocker arms in their original positions. Once everything is secure, replace the valve covers and intake manifold.
Step 9: Final Checks
Before reconnecting the battery, double-check all connections, bolts, and fittings. Ensure that there are no tools left in the engine bay.
Step 10: Start the Engine
Reconnect the battery and start the engine. Listen for any unusual noises and monitor the engine’s performance. Allow it to idle for a few minutes to ensure everything is functioning correctly.
Conclusion
Completing a .4 HEMI cam swap using Mopar OEM parts can significantly enhance your vehicle’s performance. With this step-by-step guide, you can confidently tackle the upgrade and enjoy the benefits of increased horsepower and improved engine response.