Here's a general outline of the steps involved:
1. Safety First:
* Disconnect the negative battery terminal. This is crucial to prevent accidental shorts and electrical damage.
* Allow the engine to cool completely. Working on a hot engine is dangerous.
* Use jack stands. Never work under a vehicle supported only by a jack.
* Wear safety glasses and gloves.
2. Accessing the Tensioner:
* Locate the tensioner pulley. It's part of the serpentine belt system and usually located on the front of the engine, near the alternator and power steering pump.
* You'll likely need to remove or loosen other components to gain access. This might include:
* Air intake system: Remove the air filter housing and possibly other intake components.
* Serpentine belt: You'll almost certainly need to remove the serpentine belt. This often involves using a belt tensioner tool or carefully maneuvering the tensioner to create slack. Consult a repair manual for the correct procedure. Diagram the belt routing before removal to ensure correct reinstallation.
* Possibly other components: Depending on the specific location and design, you may need to remove or loosen other ancillary components like the power steering pump or alternator. This is highly model specific, consult a repair manual.
3. Removing the Old Pulley:
* Once access is achieved, you'll likely need to remove a bolt or bolts securing the tensioner pulley. Use the correct size socket and ratchet. The bolt may be difficult to access and may require extensions or a swivel socket.
* The pulley may be pressed onto the tensioner shaft. You may need a puller tool to remove it. Improper removal could damage the tensioner.
4. Installing the New Pulley:
* Clean the tensioner shaft thoroughly. This ensures proper fit and prevents premature wear.
* Install the new pulley. If it's press-fit, you may need a press or other specialized tool. Ensure it is seated correctly and securely.
* Reinstall the retaining bolt or bolts. Tighten to the manufacturer's specified torque (found in your repair manual).
5. Reassembly:
* Reinstall the serpentine belt. Carefully follow the routing diagram you made earlier.
* Reinstall any components you removed earlier.
* Reconnect the negative battery terminal.
* Start the engine and check for any leaks or unusual noises.
Important Considerations:
* Repair Manual: A repair manual specific to your 1997 Buick Riviera is absolutely essential. It will provide detailed instructions, torque specifications, diagrams, and crucial safety information.
* Specialized Tools: You may need specialized tools like a serpentine belt tensioner tool and possibly a pulley puller.
* Professional Help: If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improper repair can lead to serious engine damage.
This is a simplified overview. The actual process can be more complex depending on your vehicle's specific configuration. Always consult a reliable repair manual before attempting any automotive repair. Remember safety is paramount.
