Tools You'll Need:
* New serpentine belt: Make sure you get the correct belt for your specific year and engine. The size is usually printed on the old belt. Auto parts stores can help you find the right one.
* Socket wrench set: You'll need various sockets and a ratchet.
* Wrench(es): Possibly for some tensioner bolts (sizes vary).
* Gloves: To protect your hands.
* Jack and jack stands (optional but recommended): Makes access easier.
* Pliers (optional): May be needed to help with belt routing.
Steps:
1. Safety First: Park your S10 on a level surface, engage the parking brake firmly, and chock the wheels. If you're using a jack, properly lift the vehicle and secure it with jack stands. Never work under a vehicle supported only by a jack.
2. Locate the Belt: Identify the serpentine belt. It's the long, ribbed belt that runs around various pulleys (alternator, power steering pump, water pump, etc.).
3. Identify the Tensioner: The tensioner is a pulley with a mechanism to create tension on the belt. It's usually spring-loaded. You'll need to loosen this tensioner to remove the old belt. This is usually done by using a wrench or socket on the tensioner's bolt. *This is the crucial step, and the method varies a lot between S10 models and years. Some tensioners require a special tool.*
4. Release Belt Tension: Once you've located the tensioner bolt, carefully turn it (usually counterclockwise) to release tension on the belt. You may need to use some force. *Be cautious not to let the tensioner spring snap back and injure you.*
5. Remove the Old Belt: Once the tension is released, the belt should be loose enough to lift off the pulleys. Start by lifting it off the smallest pulley (usually the crankshaft pulley) and work your way around.
6. Install the New Belt: Carefully route the new belt around all the pulleys in the same order as the old belt. Make sure the belt sits correctly in all the grooves.
7. Release Tensioner Bolt (slightly): Once the new belt is loosely around the pulleys, carefully tighten the tensioner bolt back a little to take some tension off the belt while you finish routing it.
8. Tighten the Tensioner: Once the belt is completely around all the pulleys, fully tighten the tensioner bolt. This will put the correct tension on the belt.
9. Check Belt Tension: After tightening the tensioner, check the belt tension by hand. There should be slight deflection (about ½ inch) when you press down on the longest span of the belt.
10. Reassembly: If you used a jack, carefully lower the vehicle.
11. Test the System: Start the engine and carefully check for any squealing or unusual noises. Also, inspect the belt to ensure it's still properly seated. If you hear squealing, the belt may be too loose or too tight, or you might have missed a pulley.
Important Considerations:
* Consult Your Repair Manual: This is crucial. The exact location of the tensioner, the type of tensioner, and the tools needed will vary based on your S10's year and engine.
* Safety: Always prioritize safety. Use jack stands, wear gloves, and be careful when working with moving parts.
* Belt Routing: Pay close attention to the routing of the belt. Getting it wrong can cause damage to your engine components. If you're unsure, take a picture of the old belt's routing before removing it.
If you're not comfortable performing this repair yourself, it's best to take your S10 to a qualified mechanic. A broken serpentine belt can lead to serious engine damage.
