2005 Jeep Grand Cherokee 3.7l 4x4 oil pump replace part 4

Introduction

This tutorial provides a comprehensive step-by-step guide on replacing the oil pump and timing chains in a 2005 Jeep Grand Cherokee 3.7L 4x4. It outlines the necessary steps to successfully complete the job, ensuring proper timing and installation of components. Whether you're a DIY enthusiast or looking to gain insights into automotive repairs, this guide will help you navigate the process.

Step 1: Prepare the Workspace

• Gather Tools and Materials: Ensure you have the following tools ready:
  • Socket set (including 13mm and other sizes)
  • Torque wrench
  • Zip ties
  • Cardboard for kneeling
  • Replacement bolts as needed
• Safety First: Make sure to wear gloves and safety goggles. Clear the area of any hazards.

Step 2: Reattach the Oil Pan and Motor Mounts

• Install the Oil Pan: Place the oil pan back in position and secure it with the necessary bolts.
• Mount the Motor: Reattach the motor mounts to hold the engine in place. Tighten the nuts on the motor mount bolts to secure them.

Step 3: Install the Intake Manifold

• Lower the Engine: Loosen the motor mount bolts slightly to lower the engine if necessary.
• Attach the Intake Manifold: Slide the intake manifold into position and secure it by tightening the bolts.

Step 4: Set Up Timing Chains

• Identify Timing Marks: Locate the timing marks on the gears:
  • The crank gear has a top dead center mark.
  • Chains have colored links to aid in alignment.
• Align the Chains:
  • Position the black links according to the alignment holes, ensuring the driver side head is properly set.
  • Use zip ties to hold the chains in place during installation.

Step 5: Install Timing Gears

• Position the Gears:
  • Place the camshaft gears onto their respective camshafts. Ensure the notches align with the black links on the chains.
• Secure the Tensioners:
  • Install the timing chain tensioners. Compress the tensioners and insert the grenade pins to hold them in position.

Step 6: Torque Specifications

• Tighten Bolts: Use a torque wrench to tighten the bolts to the manufacturer's specifications (90 foot-pounds for cam gears).
• Install Chain Guide: Slide in the chain guide and ensure it is secured.

Step 7: Reassemble Other Components

• Install Valve Covers: Replace the valve covers and torque them down.
• Attach Additional Components:
  • Fuel rail
  • Throttle body
  • Timing chain cover with gasket (torque to 43 foot-pounds)

Step 8: Final Assembly

• Reconnect Hoses and Wiring: Attach all hoses, including the crankcase ventilation pipe and heater hoses.
• Install Other Accessories: Reattach the air conditioning unit, alternator, and power steering pump.
• Replace Belts: Finally, put on the harmonic balancer and any other drive belts.

Conclusion

You have successfully replaced the oil pump and timing chains in your 2005 Jeep Grand Cherokee. Ensure all components are securely fastened, and double-check your work before starting the engine. After filling the fluids, your vehicle should be ready to run. If you encounter any issues or have questions, consult a professional mechanic for assistance. Happy driving!