Here's the general procedure. However, the exact location and method of accessing the tensioner *can* vary slightly depending on the engine (4.0L inline-6 is the most common). Consult a repair manual specific to your Jeep's engine for the most accurate instructions. A Haynes or Chilton manual is a good investment.
1. Identify the Tensioner: Locate the serpentine belt tensioner. It's a pulley with a mechanism (usually a spring-loaded arm or hydraulic system) to keep the belt taut. It's usually found on the passenger side (right) of the engine.
2. Locate the Tensioner's Release Mechanism: This is the key. It's either a:
* Bolt: You might find a bolt (often a 13mm or 15mm) that you can loosen with a wrench or socket. Turning this bolt will release the tension on the belt. Usually, turning it counter-clockwise (left) will release tension.
* Lever: Some tensioners have a lever that you can use a long wrench or ratchet to push or pull, thereby releasing the tension. Again, refer to your repair manual to confirm the direction.
3. Release the Tension: Carefully loosen the tensioner bolt or lever *just enough* to allow you to slip the belt off the pulleys. Do not remove the bolt or lever completely, just release enough tension to allow you to work with the belt.
4. Remove the Belt: Once the tension is released, you should be able to carefully pry the belt off one of the pulleys. Start with one of the smaller pulleys. Work your way around, removing the belt from each pulley.
5. Reinstallation (Reverse Order): To reinstall the belt, reverse these steps. First, route the belt around all the pulleys, then tighten the tensioner bolt or lever to secure the belt. Ensure the belt is seated correctly on all pulleys.
Important Safety Precautions:
* Disconnect the negative battery terminal before starting any work on the engine. This prevents accidental shorts or damage.
* Wear safety glasses. Broken belts or other parts can fly out.
* Use the correct tools. Improper tools can damage parts.
* Consult a repair manual. This guide provides general steps, but specific details may vary.
* If unsure about any step, consult a qualified mechanic.
Remember, working on your vehicle carries inherent risks. If you're uncomfortable performing this task yourself, it's best to have a qualified mechanic do it.
