Here's a general overview. This is not a complete, step-by-step guide and should not be used as a substitute for a professional repair manual specific to your vehicle. Always consult your owner's manual and a repair manual for detailed instructions and safety precautions.
Tools You'll Need:
* Jack and jack stands (Crucial for safety)
* Lug wrench
* Wheel chocks
* Socket wrench set (metric)
* C-clamp or brake caliper compressor tool
* Pliers
* Brake cleaner
* Wire brush (optional, for cleaning caliper surfaces)
* New brake pads (make sure you get the correct ones for your vehicle)
* Gloves
* Safety glasses
General Steps:
1. Safety First: Park on a level surface, engage the parking brake firmly, and chock the wheels (opposite the one you're working on). Use jack stands, never rely solely on the jack.
2. Remove the Wheel: Loosen the lug nuts with the lug wrench before jacking up the car. Jack up the vehicle and securely place it on jack stands. Remove the wheel.
3. Expose the Caliper: You'll now see the brake caliper clamped onto the rotor.
4. Compress the Caliper Piston: This is the most challenging part. You'll need to use a C-clamp or a brake caliper compressor tool to push the piston back into the caliper. This creates space for the new, thicker brake pads. Be careful not to damage the piston seal. Turn the piston slowly and evenly. Some pistons require turning, others push straight in. Consult a repair manual for specifics.
5. Remove the Old Brake Pads: Typically, there are retaining pins or clips holding the brake pads in place. Remove these pins or clips and carefully slide out the old pads. Inspect the pads and rotors for excessive wear. If the rotors are excessively worn, they'll need to be resurfaced or replaced.
6. Clean the Caliper: Use brake cleaner to thoroughly clean the caliper surfaces and the caliper piston.
7. Install the New Brake Pads: Carefully insert the new brake pads into their slots. Ensure they slide in smoothly and are seated correctly. Replace the retaining pins or clips.
8. Reinstall the Wheel: Carefully lower the vehicle, and reinstall the wheel, tightening the lug nuts in a star pattern.
9. Pump the Brakes: Before driving, firmly pump the brake pedal several times to ensure the brakes engage properly.
10. Test Drive: Take a short test drive to confirm the brakes are functioning correctly.
Important Considerations:
* Rotor condition: Inspect the rotors for scoring, grooves, or excessive wear. If damaged, they may need to be resurfaced or replaced.
* Caliper condition: Check the calipers for leaks or damage.
* Brake fluid: Brake fluid is hygroscopic (absorbs moisture), which can reduce its effectiveness. Consider having the brake fluid flushed and replaced if it's old or discolored. This is usually done by a mechanic.
* Torque specifications: Use a torque wrench to tighten the lug nuts to the manufacturer's specified torque. Improper tightening can lead to wheel damage or loosening.
Again, this is a simplified overview. Consult a repair manual specific to your 2002 Pontiac Grand Am GT before attempting this repair. Improper brake repair can lead to serious injury or death.
