4th Gen 4Runner Serpentine Belt & Water Pump Pulley Change | For 1GR-FE Engine - 5TH ENGINE MOD

Introduction

This tutorial will guide you through the process of changing the serpentine belt and water pump pulley on a 2006 Toyota 4Runner equipped with a 1GR-FE engine. This maintenance task is essential for ensuring your engine runs smoothly and efficiently. By following these steps, you can save on labor costs and gain hands-on experience with your vehicle.

Step 1: Gather Necessary Tools and Parts

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

Tools Required

• Socket wrench set
• Torque wrench
• Pliers
• Belt tensioner tool (optional)
• Screwdrivers (flathead and Phillips)

Parts Needed

• Serpentine belt (Part Numbers: 90916-02571, 99367-H2120)
• Water pump pulley (Non Stop Tuning Lightweight Pulley Kit NST06150K)

Practical Tip

Always double-check that you have the correct parts for your model year and engine type to avoid any compatibility issues.

Step 2: Prepare Your Vehicle

• Ensure your vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent any electrical shorts.
• Raise the front of the vehicle using jack stands for better access.

Step 3: Remove the Old Serpentine Belt

• Locate the serpentine belt routing diagram, usually found on a sticker under the hood.
• Use the belt tensioner tool to relieve tension on the belt.
• Slide the belt off the pulleys and note the routing for installation.

Common Pitfall

Take a picture of the belt routing before removal to ensure correct installation later.

Step 4: Remove the Water Pump Pulley

• Identify the water pump pulley, which is typically located near the front of the engine.
• Remove any bolts securing the pulley using a socket wrench.
• Gently pull the pulley off the water pump. If it's stuck, use a rubber mallet to loosen it.

Practical Tip

Inspect the water pump for any signs of wear or leakage while it is accessible.

Step 5: Install the New Water Pump Pulley

• Align the new water pump pulley with the mounting holes.
• Secure it in place by tightening the bolts to the manufacturer’s specified torque using a torque wrench.

Step 6: Install the New Serpentine Belt

• Refer to the picture taken in Step 3 or the routing diagram.
• Thread the new serpentine belt around the pulleys, ensuring it fits snugly in the grooves.
• Use the tensioner tool again to apply tension on the belt.

Step 7: Reconnect the Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and visually inspect the belt and pulley for proper operation.
• Listen for any unusual noises that may indicate improper installation.

Conclusion

Congratulations! You've successfully changed the serpentine belt and water pump pulley on your 2006 Toyota 4Runner. Regular maintenance like this can enhance your vehicle's performance and longevity. For future maintenance, consider checking other components like the alternator and AC belt if applicable. Happy driving!