Here's a general overview, but remember this is *not* a substitute for a repair manual:
1. Safety First: Disconnect the negative battery terminal to prevent accidental shorts. Let the engine cool completely.
2. Identify the AC Compressor: Locate the AC compressor. It's usually a cylindrical component near the front of the engine, with several lines connected to it.
3. Locate Belt Tensioner: Find the serpentine belt tensioner. This is a pulley with a mechanism (often a lever or hydraulic piston) to adjust belt tension. You'll need to use a tool to release tension – often a tensioner wrench specific to your vehicle's design (check your repair manual).
4. Remove the Belt: With the tension released, carefully remove the serpentine belt from all pulleys. Note the order in which it runs.
5. Bypass the AC Compressor: The belt will now route differently. Instead of going around the AC compressor pulley, it will go directly to the next pulley in the sequence. You may need to temporarily loosen or remove other pulleys depending on your vehicle's setup. This is where your repair manual will be crucial.
6. Install the Belt: Route the belt around the remaining pulleys in the correct order, following the path shown in your repair manual (or a diagram you find online that is *specifically* for your year/engine). Again, *double check the routing*.
7. Apply Tension: Once the belt is routed correctly, use the tensioner tool to apply the proper tension. The belt should have a slight deflection (give when pressed) but not too much. Too loose, and the belt will slip; too tight, and it will put stress on the pulleys and other components.
8. Reconnect the Battery: Reconnect the negative battery terminal.
9. Test: Start the engine and listen for any squealing or unusual noises. If you hear anything, immediately turn off the engine and check the belt tension and routing.
Important Considerations:
* Repair Manual: A repair manual is absolutely essential. The above is a general guide, and variations exist between engine types and models.
* Tensioner Tool: You'll need the correct tool to release the tensioner. Improvising can damage the tensioner or the belt.
* Pulley Alignment: Make sure all pulleys are correctly aligned before installing the belt.
* Belt Type and Size: Use the correct size and type of serpentine belt specified for your vehicle. Using the incorrect belt can cause slippage or damage.
If you are uncomfortable performing this task, it's best to take your vehicle to a qualified mechanic. Incorrect belt routing can lead to engine damage.
