Tools You'll Need:
* Wrench Set: Metric, including sockets, ratchets, and extensions. You'll likely need sizes 10mm, 12mm, 14mm, and possibly larger.
* Screwdrivers: Phillips and flathead.
* Socket Wrench (Possibly): A breaker bar might be helpful for stubborn bolts.
* Jack and Jack Stands: Essential for safety. Never work under a car supported only by a jack.
* Wheel Chocks: To prevent the car from rolling.
* Battery Disconnect: To prevent electrical shorts and damage.
* Gloves: To protect your hands.
* New Alternator: Make sure you get the correct replacement for your specific engine.
* Wire Brush: To clean terminals.
* Penetrating Oil (PB Blaster or similar): To help loosen rusted bolts.
Procedure:
1. Safety First: Disconnect the negative (-) battery cable first, then the positive (+) cable. This is crucial to prevent electrical shocks and damage to your vehicle's electrical system.
2. Access the Alternator: The alternator's location varies slightly depending on the engine (2.0L or 1.6L). Generally, it's located on the front of the engine, typically near the bottom. You'll likely need to remove some components to access it. This might include:
* Removing the serpentine belt: Use a belt wrench or appropriate tool to loosen the tensioner and remove the belt. Take note of the belt routing.
* Removing other components: Depending on the engine and its location, you may need to partially remove or loosen components like the air intake system, power steering pump, or other accessories to get better access to the alternator.
3. Disconnect the Alternator:
* Disconnect the electrical connectors: Carefully unplug the electrical connector(s) from the alternator.
* Remove the mounting bolts: Use the appropriate wrench(es) to remove the bolts securing the alternator to the engine. These bolts can be quite stubborn, so apply penetrating oil if needed and use a breaker bar if necessary.
4. Remove the Alternator: Carefully remove the alternator from its mounting location. It might be heavy, so be prepared to support its weight.
5. Install the New Alternator:
* Install the mounting bolts: Carefully align the new alternator and install the mounting bolts, tightening them to the manufacturer's specified torque.
* Reconnect the electrical connectors: Securely reconnect the electrical connectors to the new alternator.
* Install the serpentine belt: Reinstall the serpentine belt, ensuring it's properly routed over all the pulleys.
6. Reconnect the Battery: Reconnect the positive (+) battery cable, then the negative (-) cable.
7. Test the Alternator: Start the engine and check the charging system. Use a multimeter to measure the voltage at the battery terminals. It should be around 13.5-14.5 volts when the engine is running. If it's not charging correctly, there might be another problem.
Important Considerations:
* Consult a Repair Manual: This is a general guide. A repair manual specific to your 1986 Toyota Celica GT will provide detailed instructions, diagrams, and torque specifications.
* Photography: Take pictures before disconnecting anything to help you remember how everything goes back together.
* Professional Help: If you're not comfortable working on your car, it's always best to take it to a qualified mechanic.
This is a complex procedure, and omitting crucial steps or incorrectly tightening bolts can lead to damage. If you're unsure about any part of this process, seek professional help. Your safety is paramount.
