5.7 HEMI Rebuild how to go from Bare Block to COMPLETED ENGINE

Introduction

This tutorial guides you through the process of rebuilding a 5.7 HEMI engine from a bare block to a completed long block. Whether you're a seasoned mechanic or a DIY enthusiast, this step-by-step guide will help you understand the critical stages of the rebuild, including piston and bearing replacement, and upgrades like MDS delete and the installation of a 6.4 intake.

Step 1: Prepare Your Workspace

• Gather Tools and Equipment

  • Ensure you have a clean and organized workspace.
  • Collect necessary tools: wrenches, sockets, screwdrivers, torque wrench, and engine hoist.

• Safety First

  • Wear safety glasses and gloves.
  • Keep a fire extinguisher nearby and ensure good ventilation.

Step 2: Disassemble the Engine

• Remove Components

  • Take off the intake manifold, exhaust manifold, and any other attached components.
  • Label and store bolts and parts for easy reassembly.

• Inspect the Block

  • Check for any visible damage or wear on the block and other components.
  • Clean the block with a suitable solvent to remove oil and debris.

Step 3: Replace Pistons

• Remove Old Pistons

  • Use a piston removal tool to take out the old pistons.
  • Inspect the cylinder walls for scratches or damage.

• Install New Pistons

  • Apply assembly lube to the new pistons.
  • Carefully insert the new pistons into the cylinders, ensuring they are aligned correctly.

Step 4: Replace Bearings

• Remove Old Bearings

  • Detach the connecting rods and crankshaft.
  • Remove old bearings from the rods and main caps.

• Install New Bearings

  • Clean the bearing surfaces thoroughly.
  • Place new bearings in the rods and main caps, ensuring proper orientation.

Step 5: MDS Delete

• Understand MDS

  • MDS (Multi-Displacement System) allows the engine to run on fewer cylinders under light load for fuel efficiency.
  • For performance builds, a delete can improve reliability.

• Perform the Delete

  • Follow the manufacturer's instructions to remove or disable MDS components.
  • Replace the MDS components with standard non-MDS parts.

Step 6: Install 6.4 Intake

• Select the Right Intake

  • Choose a compatible 6.4 intake manifold for your 5.7 HEMI.

• Install the Intake

  • Place the new intake manifold onto the engine block.
  • Use a torque wrench to secure the bolts to the manufacturer’s specifications.

Step 7: Reassemble the Engine

• Reattach Components

  • Reinstall all previously removed components, including the oil pan, timing cover, and accessories.
  • Ensure all bolts are tightened to the correct torque.

• Double-Check Everything

  • Go through a checklist of all components and connections.
  • Inspect for any potential leaks or loose parts.

Step 8: Final Checks and Start-Up

• Fill Fluids

  • Add engine oil and coolant as per the manufacturer’s recommendations.

• Perform a Crank Test

  • Before starting, crank the engine without spark plugs to build oil pressure.

• Start the Engine

  • Start the engine and listen for any unusual noises.
  • Check for leaks and monitor the engine temperature.

Conclusion

Rebuilding a 5.7 HEMI engine can be a rewarding project that enhances both performance and reliability. By following these steps, you can successfully restore your engine to optimal condition. Remember to take your time and consult additional resources if needed. Happy rebuilding!