Here's a general overview. Specifics might vary slightly depending on the engine (2.2L or 2.4L). Always consult a repair manual specific to your 1997 Pontiac Sunfire's engine for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
Tools You'll Need:
* New serpentine belt: Make sure to get the correct size and type for your Sunfire. The part number is crucial; you can find this in your owner's manual or online using your VIN.
* Wrench set: You'll likely need various sizes, including a socket wrench and possibly a ratchet.
* Jack and jack stands: Essential for safely working under the car. Never work under a car supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* Socket extensions: May be needed to reach certain bolts.
* Pliers (optional): To help maneuver the belt.
* Gloves: To protect your hands.
* Repair Manual: Absolutely crucial for detailed instructions specific to your car.
General Steps (Consult your repair manual for precise details and torque specifications):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Raise the front of the car using the jack and securely support it with jack stands.
2. Locate the Belt and Routing: Carefully examine the belt's path around the various pulleys (alternator, power steering pump, water pump, etc.). Take photos or make a diagram before removing the old belt – this will be invaluable when installing the new one.
3. Loosen Tensioner(s): The Sunfire likely has a tensioner pulley that needs to be loosened to release the tension on the belt. This usually involves using a wrench or socket to turn a bolt on the tensioner. This will allow you to slip the belt off the pulleys. Your repair manual will show you exactly which bolt to loosen and in what direction.
4. Remove the Old Belt: Once the tension is released, carefully work the belt off each pulley, following the reverse order of its routing.
5. Install the New Belt: Starting with the tightest pulley (often the crankshaft pulley), carefully work the new belt onto each pulley, following the diagram or photo you made earlier. Make sure the belt is seated correctly on all pulleys.
6. Tighten Tensioner: Once the belt is on all pulleys, tighten the tensioner bolt back to its proper specification (found in your repair manual).
7. Check Belt Alignment and Tension: Rotate all pulleys by hand to make sure the belt is correctly seated and running smoothly. The belt should have a slight amount of give, but not be too loose or too tight.
8. Lower the Car: Carefully lower the car to the ground.
9. Test Run: Start the engine and listen for any squealing or unusual noises. Check the belt for any signs of slipping or wear.
Important Considerations:
* Belt Routing: Getting the belt routing incorrect is a common mistake. Pay close attention to the diagram in your repair manual.
* Tension: Too much or too little tension can damage the belt and related components. Follow the instructions in your repair manual carefully.
* Pulley Alignment: Misaligned pulleys can cause premature belt wear and damage.
* Proper Tools: Using the wrong tools can strip bolts or cause other damage.
Again, using a repair manual specific to your 1997 Pontiac Sunfire is absolutely essential. This guide is a general overview and doesn't replace professional advice or a detailed repair manual. If you're not comfortable with this task, have a qualified mechanic do it. A damaged belt can lead to serious engine problems.
