Tools You'll Likely Need:
* Socket set (metric): Various sizes, including likely a 13mm, 15mm, and possibly others depending on the specific bolts.
* Wrench set (metric): May be needed for some bolts.
* Ratchet: To use with your sockets.
* Extension(s): To reach difficult bolts.
* Jack and jack stands: Essential for safety. Never work under a car supported only by a jack.
* Wheel chocks: To secure the car.
* New drive belt tensioner: Make sure you get the correct part for your vehicle.
* New drive belt (recommended): Since you're already in there, replacing the belt is a good idea. It's relatively inexpensive and prevents premature failure of the new tensioner.
* Gloves: To protect your hands.
* Safety glasses: To protect your eyes.
* Torque wrench: Crucial for tightening bolts to the proper specification. Improper torque can damage components.
* Possibly a breaker bar: Some bolts can be stubborn.
Procedure (General Steps - Refer to a Repair Manual!):
1. Safety First: Park the car on a level surface, engage the parking brake, and use wheel chocks. Raise the car using a jack and securely support it with jack stands.
2. Locate the Tensioner: Identify the drive belt tensioner. It's usually a pulley with a mechanism to adjust tension. Your repair manual will show you its exact location.
3. Disconnect the Battery: This prevents accidental short circuits.
4. Remove the Drive Belt: This is usually necessary to access the tensioner. You'll need to relieve the tension on the belt. This often involves using a wrench or socket on the tensioner pulley to release tension. The manual will guide you on how to do this safely.
5. Remove the Tensioner: This involves removing the bolts holding the tensioner to the engine block or other mounting point. Note their location and orientation for reassembly.
6. Install the New Tensioner: Carefully install the new tensioner, aligning it properly with its mounting points.
7. Install the Drive Belt: Re-install the drive belt, ensuring it's properly routed around all the pulleys. Your repair manual will have a diagram showing the correct routing.
8. Tighten Bolts: Tighten all the bolts to the manufacturer's specified torque. This is critical to avoid damage. Use your torque wrench.
9. Lower the Car: Carefully lower the car from the jack stands.
10. Check the Belt Tension: Verify the belt tension is correct. The belt should have a slight amount of give, but not too much.
11. Test: Start the engine and check for any unusual noises or belt slippage.
Important Considerations:
* Repair Manual: A repair manual is invaluable. It provides detailed diagrams, torque specifications, and step-by-step instructions specific to your vehicle.
* Torque Specifications: Use a torque wrench to tighten bolts to the correct specifications. Over-tightening can strip threads, while under-tightening can cause components to loosen.
* Professional Help: If you're unsure about any step, consult a qualified mechanic. Improper repair can lead to serious damage to your engine.
This is a general overview; consult your repair manual for detailed instructions and diagrams specific to your 1993 Pontiac Sunbird LE 2.0L. Remember, working on a car involves risks, and safety should always be your top priority.
