Tools You'll Likely Need:
* Socket Wrench and Socket: The correct size to fit the pulley bolt. This is often a large bolt and might require a breaker bar for added leverage.
* Wrench (or Socket and Ratchet): To hold the power steering pump itself while you loosen the pulley bolt. This prevents the pump from spinning.
* Pulley Puller: A specific tool designed to remove pulleys from shafts. There are different types; you'll need one appropriate for your pump's pulley design. This is crucial and often the most difficult part.
* Penetrating Oil (like PB Blaster): Soak the pulley bolt generously several hours or overnight before attempting to remove it. This helps break loose any rust or corrosion.
* Gloves: Protect your hands.
* Jack and Jack Stands (or ramps): To safely lift and support the vehicle. This is for easier access.
Procedure:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental short circuits. Support the vehicle securely on jack stands.
2. Access: Locate the power steering pump. It's usually near the front of the engine.
3. Prepare the Pulley Bolt: Generously apply penetrating oil to the pulley bolt. Let it soak for at least a few hours, preferably overnight.
4. Wrench/Hold the Pump: Using a wrench (or socket and ratchet) appropriately sized for the pump body, hold the pump stationary to prevent it from turning while you loosen the pulley bolt. This is *essential* to avoid stripping the bolt or damaging the pump. Some people use a strap wrench for this.
5. Remove the Pulley Bolt: Use your socket wrench and breaker bar (if needed) to carefully loosen and remove the pulley bolt. Turn it counter-clockwise.
6. Use the Pulley Puller: This is where things get tricky. There are several types of pulley pullers. You'll need to carefully attach the puller to the pulley according to the puller's instructions. The puller will usually have a screw mechanism that pulls the pulley off the shaft. Apply pressure gradually and steadily.
7. Inspect: Once the pulley is off, inspect the shaft for damage or corrosion. Clean any debris.
8. Reassembly (Reverse Order): When installing a new pulley (or reinstalling the old one), ensure the pulley is seated correctly and the bolt is tightened to the correct torque specification as listed in your repair manual.
Important Considerations:
* Type of Pulley Puller: The right puller is critical. If you have the wrong type, you can damage the pulley or the power steering pump.
* Seized Bolt: If the bolt is very stubborn, you might need to use a torch to carefully heat the area around the bolt (be extremely careful not to damage anything else). As a last resort, you might need to drill the bolt out.
* Professional Help: If you're not comfortable with this repair, it's best to take your car to a qualified mechanic. Damaging the power steering pump can be costly.
This is a general guide. Always refer to a repair manual specific to your 1999 Buick LeSabre before starting this repair. Improperly removing the pulley can cause damage and lead to further complications.
