Here's a general outline. Specifics may vary slightly depending on the exact power steering pump model. Always consult a repair manual specific to your vehicle year and engine for precise instructions and torque specifications.
Tools You'll Likely Need:
* Socket wrench and sockets: The correct size for the power steering pump pulley bolt. This is usually a large bolt and may require a breaker bar for extra leverage.
* Pulley puller: A three-jaw puller is typically used for this job. It's specifically designed to grip the pulley without damaging it. Make sure you get one that fits the pulley diameter.
* Wrench or socket to hold the pump: You'll need a way to keep the pump from turning while you loosen the pulley bolt. This might involve a large wrench on the pump itself or a special tool that fits over the pump's mounting bracket.
* Penetrating oil (like PB Blaster): Apply this to the pulley bolt several hours before attempting removal to help break loose any corrosion or seizing.
* Torque wrench: Essential for reinstalling the pulley bolt to the correct torque specification to prevent damage.
* Gloves and safety glasses: Protect yourself from injury.
Procedure:
1. Disconnect the battery: This is crucial for safety.
2. Access the pulley: You'll need to get under the car or possibly remove some components (like the serpentine belt) to access the power steering pump pulley.
3. Remove the serpentine belt: The belt must be removed to access the pulley bolt. Consult your vehicle's repair manual for the proper procedure.
4. Apply penetrating oil: Generously apply penetrating oil to the pulley bolt. Allow it to soak for several hours, or even overnight.
5. Secure the power steering pump: Use a wrench or the appropriate tool to firmly hold the power steering pump shaft from turning.
6. Loosen the pulley bolt: Use the socket wrench and breaker bar (if needed) to carefully loosen the pulley bolt. Turn it counterclockwise.
7. Remove the pulley bolt: Once loose, completely remove the pulley bolt.
8. Attach the pulley puller: Carefully install the pulley puller according to the manufacturer's instructions. Ensure the jaws are securely gripping the pulley.
9. Remove the pulley: Slowly and carefully tighten the puller's center bolt to pull the pulley off the shaft.
10. Inspect the pulley and shaft: Check the pulley and the power steering pump shaft for damage.
11. Installation: Reassembly is the reverse of removal. Remember to use the torque wrench to tighten the pulley bolt to the correct specification found in your repair manual.
Important Considerations:
* Seized bolt: If the bolt is extremely stubborn, you may need to use more aggressive methods like an impact wrench (with caution!) or even consider drilling it out as a last resort. This should only be done by someone with experience.
* Damaged pulley: If the pulley is damaged or shows signs of wear, replace it. A damaged pulley can cause further issues.
* Repair manual: Always consult a repair manual specific to your 2002 Chevy Impala. This will provide detailed diagrams and torque specifications.
This process can be challenging, and mistakes can lead to significant damage. If you're not comfortable performing this task yourself, it's best to take your car to a qualified mechanic.
