Step-by-step Hemi Mds Delete Installation Guide for 5.7l and 6.4l Engines

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The HEMI MDS (Multi-Displacement System) is designed to improve fuel efficiency by deactivating half of the engine’s cylinders during light-load conditions. However, some enthusiasts prefer to disable this system for various reasons, including performance enhancements. This guide will walk you through the step-by-step process of performing an MDS delete on 5.7L and 6.4L HEMI engines.

Tools and Materials Needed

  • Socket set
  • Torque wrench
  • HEMI MDS delete kit
  • Engine oil
  • New oil filter
  • Shop towels
  • Safety glasses
  • Gloves

Preparation Steps

Before starting the installation process, it is essential to prepare your workspace and ensure you have all necessary tools and materials at hand. Follow these preparation steps:

  • Park the vehicle on a flat surface and engage the parking brake.
  • Disconnect the negative battery terminal to prevent any electrical issues.
  • Allow the engine to cool down completely.

Removing the Engine Covers

The first step in the MDS delete process is to remove the engine covers. This will provide access to the components that need to be modified. Follow these steps:

  • Using a socket wrench, remove the bolts securing the engine cover.
  • Carefully lift off the engine cover and set it aside.
  • Repeat the process for any additional covers that may be present.

Removing the Valve Lifters

With the engine covers removed, the next step is to access and remove the valve lifters associated with the MDS system. Follow these steps:

  • Locate the valve lifters on the engine.
  • Using the socket set, carefully remove the bolts securing the lifters.
  • Gently lift the lifters out of their positions and set them aside.

Installing the MDS Delete Kit

Now that the valve lifters are removed, it’s time to install the HEMI MDS delete kit. This kit typically includes new lifters and necessary hardware. Follow these steps:

  • Refer to the instructions provided with the MDS delete kit for specific installation steps.
  • Install the new lifters in place of the old MDS lifters.
  • Ensure all components are properly aligned and seated.
  • Secure the lifters with the bolts, tightening them to the manufacturer’s specifications using a torque wrench.

Reassembling the Engine

Once the MDS delete kit is installed, you can begin reassembling the engine. Follow these steps:

  • Reattach any engine covers that were removed earlier.
  • Ensure all bolts are tightened securely.
  • Replace the oil filter and refill the engine with fresh oil.

Final Checks and Battery Reconnection

After reassembling the engine, it’s crucial to perform final checks before starting the vehicle. Follow these steps:

  • Double-check all connections and ensure nothing is left loose.
  • Reconnect the negative battery terminal.
  • Start the engine and listen for any unusual noises.
  • Check for leaks around the oil filter and other components.

Conclusion

Performing an MDS delete on your 5.7L or 6.4L HEMI engine can enhance performance and provide a more engaging driving experience. By following this step-by-step guide, you can successfully complete the installation process. Always remember to consult your vehicle’s manual and the MDS delete kit instructions for specific details.