Tools You'll Need:
* New serpentine belt: Make sure to get the correct size and type for your engine. The part number will be found in your owner's manual or at an auto parts store using your vehicle's VIN.
* Wrench(es): You'll likely need a variety of sizes depending on the tensioner pulley design. Usually, a 13mm or 15mm wrench will be needed, but check your vehicle's specifications. A ratchet makes this easier.
* Socket wrench and sockets: Might be helpful depending on the tensioner design.
* Jack and jack stands (highly recommended): Safely lifting the vehicle allows easier access. Never work under a vehicle supported only by a jack.
* Gloves: To protect your hands.
* Shop rags: To clean up any debris.
* Pliers (optional): May be helpful for maneuvering the belt.
Steps:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental shorts or electrical shocks. Place the vehicle on a level surface, engage the parking brake, and use jack stands to support the vehicle after safely lifting it with a jack.
2. Locate the Tensioner: The serpentine belt tensioner is a pulley with a mechanism to release tension on the belt. This is crucial to removing and installing the belt. Its location varies slightly depending on the specific engine; consult your repair manual or look closely at your engine bay.
3. Release Belt Tension: This is the most critical step and varies by vehicle. There are typically two ways a tensioner releases:
* Manual tensioner: This usually involves using a wrench (often a long handled one for leverage) to rotate the tensioner pulley, releasing the tension on the belt. You may need to turn it clockwise or counterclockwise; observing carefully will show you which way to turn it.
* Automatic tensioner: Some have a spring-loaded mechanism that might require depressing a lever or using a specific tool. Again, consult your repair manual.
4. Remove the Old Belt: Once the tension is released, carefully remove the old serpentine belt. It may be helpful to use pliers to pull the belt from a pulley.
5. Install the New Belt: Route the new serpentine belt around all the pulleys in the correct order. It's essential to follow the correct routing; a misrouted belt can damage your engine. Your repair manual will show you the correct path. Carefully align the belt on each pulley.
6. Release Tensioner: Once the belt is fully installed, slowly release the tension on the tensioner pulley (or lever) so that it automatically clamps the belt.
7. Check Belt Tension: Ensure the belt is properly tensioned. It should have a slight give, but not be overly loose or too tight.
8. Reassemble and Test: Lower the vehicle safely, reconnect the negative battery terminal, and start the engine. Listen carefully for any squealing or unusual noises, which indicate problems with the belt tension or routing.
9. Double-Check: Check the belt again after a short drive to ensure it remains properly seated and there's no slippage.
Important Considerations:
* Repair Manual: This is crucial. It provides engine-specific information and diagrams.
* Belt Routing: Getting the belt routing wrong can severely damage your engine. Take your time and carefully follow the diagram in your repair manual.
* Tension: Improper tension can lead to premature belt wear or failure.
* Safety: Always prioritize safety. Use jack stands, disconnect the battery, and be mindful of moving parts.
If you're uncomfortable with any of these steps, it's best to take your vehicle to a qualified mechanic. A poorly installed belt can cause serious engine damage.
