Tools You'll Likely Need:
* Socket set: Various sizes, including likely a 13mm, 15mm, and possibly others.
* Wrench set: Matching sizes to your sockets.
* Ratchet: A good quality ratchet will make the job much easier.
* Extension bars: To reach difficult-to-access bolts.
* Pliers or needle-nose pliers: For disconnecting electrical connectors.
* Jack and jack stands: Crucial for safety. Never work under a vehicle supported only by a jack.
* Wheel chocks: For added safety.
* Wires: Jumper wires to test the alternator after installation are a good idea.
* Multimeter: (Optional, but helpful for testing the alternator's output)
* New alternator: Ensure you purchase the correct alternator for your specific Alero model and engine.
* Gloves and safety glasses: Protect yourself.
* Repair manual: Highly recommended for detailed instructions and diagrams specific to your vehicle.
Steps:
1. Safety First: Disconnect the negative battery terminal. This prevents electrical shocks and short circuits.
2. Access the Alternator: The alternator's location varies slightly depending on the Alero's engine configuration (specifically the 2.2L Ecotec). Generally, it's located on the front of the engine, often near the bottom. You'll probably need to partially remove some under-hood components to access it fully. This might involve:
* Removing the air intake system: This often requires disconnecting various hoses and clamps.
* Removing the serpentine belt: This requires loosening the tensioner pulley; the procedure can vary depending on your specific Alero.
* Possibly removing other components: Consult your repair manual for specifics.
3. Disconnect the Electrical Connections: Carefully disconnect the alternator's wiring harness connector and the thick battery cable. Take note of how everything connects for reassembly. Some harnesses may have multiple connectors.
4. Remove the Alternator Mounting Bolts: The alternator is usually held in place by two or three bolts. Remove these bolts using the appropriate sockets and wrenches.
5. Remove the Alternator: Once the bolts are removed, carefully remove the alternator from its mounting bracket. It may be slightly snug due to the belt tension, so gently work it free.
6. Install the New Alternator: Reverse the removal process to install the new alternator. Ensure the alternator is properly seated in its bracket.
7. Reconnect the Electrical Connections: Carefully reconnect the battery cable and the wiring harness connector, ensuring a secure connection.
8. Reinstall Removed Components: Reinstall any components you removed to access the alternator (serpentine belt, air intake, etc.). Make sure everything is properly connected and secured.
9. Reconnect the Battery: Reconnect the negative battery terminal.
10. Test the Alternator: Start the engine and check if the alternator is charging the battery. You can do this by:
* Checking the battery voltage with a multimeter: The voltage should be around 13.5-14.5 volts when the engine is running. A lower voltage indicates a problem.
* Observing the battery light on the dashboard: The light should go off once the engine starts and the alternator is working correctly.
Important Considerations:
* Serpentine Belt Tensioner: This is often a tricky part of the job. Use the proper tool to release tension on the belt to allow for easy removal and reinstallation.
* Torque Specifications: Always tighten bolts to the manufacturer's specified torque using a torque wrench. Over-tightening can damage the alternator or its mounting bracket.
* Repair Manual: A repair manual specific to your 2000 Oldsmobile Alero is invaluable. It will provide detailed instructions, diagrams, and torque specifications.
If you are uncomfortable performing this repair yourself, it's best to take your Alero to a qualified mechanic. Improper installation can lead to further damage to your vehicle.
