Jeep Grand Cherokee 3.6 Rocker Arm and Camshaft Replacement

Introduction

This tutorial provides a step-by-step guide for replacing the rocker arms and camshaft in a Jeep Grand Cherokee 3.6. This process can be complex, but with the right tools and instructions, you can successfully complete the job. Whether you're a seasoned mechanic or a DIY enthusiast, this guide will help you navigate the replacement process efficiently.

Step 1: Gather Necessary Tools and Parts

Before starting the replacement, ensure you have the following tools and parts:

Tools Required

• Cam phaser holder tool
• Electric ratchet
• Wrench and socket set
• Ratcheting wrench set
• Prybar set
• Plastic scraper
• Torque wrench

Parts Required

• Valve cover gasket set
• RTV sealant
• Roller followers (2011-2015 or 2016-2024)
• Hydraulic lifters (MELLING JB7525 for 2011-2015 or MOPAR 05047883AC for 2016-2024)
• Exhaust and intake camshafts (MELLING or MOPAR depending on the model year)

Make sure to check availability as some parts may not be sold on Amazon.

Step 2: Prepare the Vehicle

• Park the Jeep on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to prevent any electrical accidents.
• Remove any engine covers or accessories obstructing access to the valve cover.

Step 3: Remove the Valve Cover

• Using your wrench and socket set, remove the bolts securing the valve cover.
• Carefully lift the valve cover off, ensuring no debris falls into the engine.
• Inspect the old gasket for damage; it will need to be replaced.

Step 4: Replace Rocker Arms and Camshaft

• Remove the old rocker arms:

  • Unbolt the rocker arms from their positions carefully.
  • Replace with new rocker arms, ensuring proper alignment.

• Remove the old camshaft:

  • Use the cam phaser holder tool to hold the camshaft in place.
  • Unbolt the camshaft and gently pull it out of the engine.
  • Insert the new camshaft, ensuring it is positioned correctly.

Step 5: Install New Hydraulic Lifters and Roller Followers

• Remove the old hydraulic lifters and replace them with new ones.
• Install roller followers according to the manufacturer's specifications.

Step 6: Reassemble the Engine

• Apply RTV sealant to the new valve cover gasket.
• Place the valve cover back and secure it with bolts, tightening them to the manufacturer’s specifications using a torque wrench.
• Reinstall any components or accessories you previously removed.

Step 7: Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and listen for any unusual noises. Check for oil leaks around the valve cover.
• Allow the engine to reach its operating temperature and ensure everything is functioning properly.

Conclusion

Replacing the rocker arms and camshaft in a Jeep Grand Cherokee 3.6 involves several detailed steps, from gathering tools to reassembling the engine. By following this guide, you can complete the replacement successfully. Always ensure you have the necessary parts on hand and refer to your vehicle’s service manual for specific torque settings and additional details. If you feel uncertain about any part of the process, consider consulting a professional mechanic.