Tools You'll Likely Need:
* Socket set (metric): Various sizes, including a 13mm, 15mm, and possibly others depending on your specific car's configuration.
* Wrench set (metric): May need open-end or box-end wrenches to supplement the socket set, especially for tight spaces.
* Ratchet and extensions: To reach those hard-to-access bolts.
* Pliers: Possibly needle-nose for electrical connectors.
* Screwdrivers: Phillips and possibly flathead, depending on the alternator's mounting.
* Jack and jack stands: Essential for safe working conditions. Support the car properly!
* Wheel chocks: For added safety.
* Battery wrench: To disconnect the battery.
* New alternator: Make sure you get the correct replacement for your year and model.
* Wire brush: To clean terminals.
* Electrical tape or shrink wrap: To protect any exposed wires.
* Gloves and safety glasses: Always important when working on cars.
Steps:
1. Disconnect the Battery: This is crucial to prevent electrical shorts and injury. Disconnect the negative (-) terminal first, then the positive (+).
2. Access the Alternator: This is the most challenging part. The alternator is usually located on the front of the engine, somewhat tucked away. You might need to remove or loosen other components to gain access, such as:
* Air intake components: Remove as much of the air intake system as necessary for clear access.
* Power steering lines (potentially): These might be in the way, requiring careful maneuvering. *Exercise extreme caution when working near power steering lines and other fluid lines to prevent leaks or injury.*
* Other belts: May need to loosen or remove the serpentine belt. Consult your repair manual to ensure you do this correctly.
3. Disconnect the Electrical Connections: Carefully disconnect the alternator's wiring harness. Take photos or make notes before disconnecting to ensure you reconnect everything correctly.
4. Remove the Alternator Mounting Bolts: These bolts are typically on the back of the alternator. You'll need patience and possibly some maneuvering to access and remove them. The tight space in the engine bay of the Fiero makes this difficult.
5. Remove the Alternator: Once the bolts are removed, carefully remove the alternator. It might be heavy; be prepared.
6. Install the New Alternator: Carefully install the new alternator, reversing the removal steps. Make sure it's seated correctly before tightening the bolts.
7. Reconnect the Electrical Connections: Reconnecting the wiring harness is as critical as disconnecting it; ensure everything is firmly attached.
8. Reconnect the Battery: Connect the positive (+) terminal first, then the negative (-).
9. Test the System: Start the engine and check the voltage gauge. It should show a normal voltage reading, indicating the alternator is charging the battery properly.
Important Considerations:
* Repair Manual: A Fiero-specific repair manual is invaluable. It will provide detailed diagrams and instructions, crucial for navigating the tight engine bay.
* Serpentine Belt: Pay close attention to the serpentine belt routing when removing and reinstalling it. Improper routing can cause the belt to slip or break.
* Torque Specifications: Use the correct torque specifications for all bolts and nuts to avoid damaging components.
* Safety First: Remember to always work in a well-ventilated area and wear appropriate safety gear.
If you're not comfortable working on cars, or you lack the necessary tools and experience, it's best to take your Fiero to a qualified mechanic. This job can be more challenging than it might initially appear due to the engine's cramped layout.
