Here's a general outline. Remember that this is a general guide and the exact procedure may vary slightly. Always consult a repair manual specific to your 1997 Oldsmobile Aurora for detailed instructions, torque specifications, and diagrams.
Tools You'll Likely Need:
* Repair Manual: Absolutely essential for specific details and torque specs.
* Jack and Jack Stands: Safely support the vehicle.
* Wheel Chocks: For added safety.
* Wrench Set: Metric, likely including sockets, ratchets, and extensions.
* Socket Set: Sizes will depend on the specific bolts.
* Torque Wrench: To tighten bolts to the manufacturer's specifications. Improper torque can damage the pulley or other components.
* Pry Bar (or similar tool): Might be needed to help loosen stubborn pulleys.
* Wrench for the serpentine belt tensioner: This is crucial for removing the serpentine belt.
* New Idler Pulley: Ensure you get the correct replacement part.
* Gloves and Safety Glasses: Protect yourself.
* Possibly a Pulley Installer/Remover Tool: Depending on the pulley design, this might make the job easier and prevent damage.
General Steps (Consult your repair manual for specifics):
1. Safety First: Disconnect the negative battery cable. Support the vehicle securely on jack stands. Use wheel chocks.
2. Remove the Serpentine Belt: This is usually the most challenging part. Locate the serpentine belt tensioner. Use the correct wrench to release tension on the tensioner, allowing you to remove the belt from the pulleys. It's often helpful to take a picture of the belt routing before removal to aid in reinstallation.
3. Access the Idler Pulley: Depending on the location of the idler pulley, you may need to remove other components for better access. This might include removing some engine shrouds or other accessories. Your repair manual will show you exactly what needs to be removed.
4. Remove the Idler Pulley Bolt(s): Carefully remove the bolt(s) that hold the idler pulley in place.
5. Remove the Idler Pulley: The pulley might be stubborn. A pry bar may be helpful, but be cautious not to damage the pulley or surrounding components.
6. Install the New Idler Pulley: Carefully install the new idler pulley, ensuring it's properly seated. Tighten the bolt(s) to the manufacturer's specified torque using a torque wrench.
7. Reinstall the Serpentine Belt: Route the serpentine belt back onto the pulleys according to the diagram (or your earlier photo). Make sure it's properly seated on all pulleys.
8. Reconnect the Battery: Reconnect the negative battery cable.
9. Test and Inspect: Start the engine and listen for any unusual noises. Check the belt tension. Visually inspect everything to make sure nothing was damaged during the process.
Important Considerations:
* Specifics Vary: The exact procedure and tools required will vary slightly depending on the specific engine in your 1997 Oldsmobile Aurora. Consult a repair manual.
* Torque Specifications: Using a torque wrench and adhering to the manufacturer's torque specifications is critical to prevent damage.
* Professional Help: If you are not comfortable with this type of repair, taking your vehicle to a qualified mechanic is the safest and best option. The cost of repair is far less than the cost of potential engine damage caused by improper repair.
This is a complex repair. Again, always consult a repair manual specific to your vehicle before attempting this repair. Improper repair can lead to serious damage and injury.
