Here's a general outline of the process. Remember, this is a simplified guide, and specific details may differ:
1. Gather Tools and Materials:
* New serpentine belt: Make sure you purchase the correct belt for your specific engine. The part number is usually found on the old belt or in your owner's manual.
* Socket wrench set: You'll need various sizes to loosen and tighten pulley bolts.
* Wrench set: May be needed for some components.
* Ratchet: To speed up the process.
* Jack and jack stands: Safely elevate your vehicle. Never work under a car supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* Gloves: To protect your hands.
* Repair manual: Specific to your Malibu's year and engine. This is crucial for detailed instructions and diagrams.
2. Prepare the Vehicle:
* Park on a level surface, engage the parking brake, and use wheel chocks.
* Locate the serpentine belt diagram under the hood. This will show the routing of the belt.
* Consult your repair manual for specific instructions and diagrams for your engine.
3. Loosen the Belt Tensioner:
* This is the most crucial step. The serpentine belt tensioner is a pulley with a mechanism to release tension on the belt. This is usually done by using a socket or wrench to turn a bolt or lever on the tensioner. Again, your repair manual is crucial here, as the location and method of releasing tension vary between engines and years.
* Some tensioners require you to use a special tool. If this is the case, you'll need to acquire one before proceeding.
4. Remove the Old Belt:
* Once the tension is released, the belt should be loose enough to slip off the pulleys. Follow the route of the belt as shown in the diagram to carefully remove it.
5. Install the New Belt:
* Route the new belt around the pulleys, following the exact path of the old belt (using your diagram). Make sure the belt is seated properly on all pulleys.
* Carefully tighten the belt tensioner. This is crucial to get the right amount of tension on the belt. Too loose and it will squeal and slip; too tight and it will put excess strain on the pulleys and bearings. Many repair manuals will have specifications for belt tension.
* After tightening the tensioner, carefully release the tensioner mechanism.
6. Check Tension and Routing:
* Once the belt is installed, visually check that it's correctly seated on all pulleys.
* Try to twist the belt by hand. It should have a slight resistance but should not be overly tight. Refer to your repair manual for proper tension.
7. Lower the Vehicle and Test:
* Carefully lower your vehicle.
* Start the engine and check for any squealing or slipping.
* Inspect the belt after a short run to ensure it's not slipping or damaged.
Important Considerations:
* Safety First: Always disconnect the negative battery terminal before starting any work on the electrical system.
* Correct Belt: Use the correct replacement belt for your vehicle's engine.
* Repair Manual: This is essential. It provides crucial specifics for your vehicle.
This is a general overview; the specific steps might differ based on your Malibu's year and engine. Always refer to a repair manual specific to your vehicle for detailed instructions and diagrams. If you are not comfortable performing this repair, it's best to take your car to a qualified mechanic.
