Safety First:
* Disconnect the negative battery cable before starting any work. This prevents accidental short circuits and shocks.
* Use jack stands to securely support the vehicle once it's lifted. Never work under a car supported only by a jack.
* Wear safety glasses to protect your eyes from debris.
* Use gloves to protect your hands.
Tools You'll Need:
* Jack and jack stands
* Wrench set (metric) – including sockets, ratchets, and extensions
* Socket wrench with a universal joint (highly recommended for better access)
* Torque wrench (for proper tightening of bolts)
* Wire brush or sandpaper (to clean battery terminals and starter connections)
* Penetrating oil (like PB Blaster)
* Pry bar (possibly)
* New starter motor (ensure it's the correct one for your specific engine)
Procedure:
1. Access the Starter: The starter is typically located on the passenger side of the engine, near the bellhousing (the area where the engine connects to the transmission). You'll likely need to remove some components to get to it. This might include:
* Air intake system: Disconnect the air filter housing and associated hoses.
* Exhaust components: Possibly some heat shields or exhaust components may need to be loosened or removed for better access.
* Wiring harnesses: You may have to carefully move or loosen some wiring harnesses out of the way. Take pictures before disconnecting anything to aid in reassembly.
2. Disconnect the Starter Wiring: Locate the two large cables connected to the starter (one positive, one negative). Use your wrenches to disconnect these cables. Clean the terminals with a wire brush before disconnecting to ensure a good connection.
3. Remove the Starter Mounting Bolts: The starter is held in place by typically two bolts. These bolts can be very stubborn due to corrosion and heat. Liberally apply penetrating oil to the bolts several hours in advance to help loosen them. Use the appropriate sockets and wrenches to remove the bolts. You might need a universal joint to reach them comfortably.
4. Remove the Starter: Once the bolts are removed, the starter should be able to be pulled free. There might be some resistance. A gentle pry bar can help, but be careful not to damage anything.
5. Install the New Starter: Clean the mounting surface on the engine block where the starter sits. Install the new starter, aligning the mounting holes. Insert and tighten the bolts to the manufacturer's specified torque.
6. Reconnect the Wiring: Reconnect the battery cables to the new starter. Ensure they are securely fastened.
7. Reassemble Everything: Carefully reinstall all the components you removed earlier, ensuring everything is connected properly.
8. Reconnect the Battery: Reconnect the negative battery cable.
9. Test the Starter: Try starting your car.
Important Considerations:
* Consult a Repair Manual: A repair manual specific to your 1999 Buick Century will provide detailed diagrams, torque specifications, and step-by-step instructions tailored to your vehicle. This is highly recommended.
* Professional Help: If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Improper installation can lead to further damage.
This guide provides a general overview. Always prioritize safety and consult a repair manual for the most accurate and detailed instructions for your specific vehicle. If you encounter unexpected difficulties, seek professional assistance.
