How to Replace Tensioner 07-09 Toyota FJ Cruiser

Introduction

This tutorial provides a step-by-step guide on how to replace the serpentine belt tensioner on a 2007-2009 Toyota FJ Cruiser. A failing tensioner can lead to poor belt performance, resulting in squeaking or slipping belts. This guide will help you perform the replacement with ease using common tools.

Step 1: Gather Necessary Tools and Materials

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

• Flat Blade Screwdriver
• Pry Bar
• 10mm Socket
• 12mm Socket
• 14mm Socket
• 19mm Socket
• Coolant Funnel Set
• Trim Tool Set
• Pliers
• Ratchet
• Socket Extensions
• Torque Wrench
• Floor Jack
• Jack Stands

Consider purchasing a new drive belt component kit if needed, which can be found at 1AAuto.

Step 2: Prepare the Vehicle

1. Safety First: Park the vehicle on a level surface, engage the parking brake, and disconnect the battery to prevent any electrical issues.
2. Lift the Vehicle: Use a floor jack to lift the front of the vehicle and secure it with jack stands for safety.

Step 3: Remove the Serpentine Belt

1. Locate the Tensioner: Find the serpentine belt tensioner, which is usually mounted on the front of the engine.
2. Release Tension: Use the appropriate socket to turn the tensioner pulley counterclockwise. This will relieve tension on the belt.
3. Remove the Belt: Once the tension is released, slide the serpentine belt off the tensioner and note how it is routed for reinstallation.

Step 4: Remove the Old Tensioner

1. Unbolt the Tensioner: Using the correct socket size (typically 14mm), remove the bolts securing the tensioner to the engine.
2. Disconnect the Tensioner: Carefully pull the tensioner away from its mounting location and disconnect any connectors if applicable.

Step 5: Install the New Tensioner

1. Position the New Tensioner: Place the new tensioner in the same position as the old one.
2. Secure with Bolts: Use the socket to tighten the bolts to the manufacturer's specifications using a torque wrench.
3. Reconnect Any Connectors: If there were any connectors on the old tensioner, ensure they are connected to the new one.

Step 6: Reinstall the Serpentine Belt

1. Refer to Routing Diagram: If needed, refer to the routing diagram typically found on the engine compartment to correctly position the serpentine belt.
2. Apply Tension: Use the socket to rotate the tensioner counterclockwise once again and slide the belt onto the tensioner pulley.
3. Ensure Proper Fit: Double-check that the belt is seated correctly on all pulleys.

Step 7: Test the Installation

1. Reconnect the Battery: Once everything is reassembled, reconnect the battery.
2. Start the Engine: Start the vehicle and let it run for a few moments to ensure the belt is functioning properly and no unusual noises are present.

Conclusion

Replacing the serpentine belt tensioner on a Toyota FJ Cruiser is a straightforward process that can be done with basic mechanical skills. By following these steps, you can ensure your vehicle runs smoothly and efficiently. If you face any difficulties or have questions, consider consulting a professional mechanic for assistance.