Tools you'll need:
* Jack and jack stands (Crucial for safety)
* Wheel chocks
* Lug wrench
* Socket wrench with appropriate sockets (likely 15mm, 18mm, possibly others depending on your specific model and caliper)
* C-clamp or caliper compression tool (Highly recommended to avoid damaging the caliper piston)
* Pliers or brake caliper piston compression tool
* Brake cleaner
* Penetrating oil (like PB Blaster)
* Wire brush or sandpaper (optional, for cleaning caliper surfaces)
* New brake pads (Make sure you get the correct pads for your vehicle!)
* Gloves
Procedure:
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the rear wheels. Jack up the front of the vehicle and securely place it on jack stands. Never work under a vehicle supported only by a jack.
2. Remove the Wheel: Remove the lug nuts using the lug wrench and then take off the wheel.
3. Expose the Caliper: You'll now see the brake caliper clamped around the rotor.
4. Remove the Caliper:
* Locate the Caliper Bolts: These are usually on the back of the caliper. They may be covered in brake dust, so use brake cleaner to help you see them clearly.
* Apply Penetrating Oil (optional): If the bolts are stubborn, apply penetrating oil and let it sit for a few minutes.
* Unscrew the Bolts: Carefully remove the caliper bolts.
5. Compress the Caliper Piston: This is the most critical step. The piston needs to be pushed back into the caliper to make room for the new, thicker brake pads.
* Use a C-Clamp or Compression Tool: This is the safest method. Position the clamp on the piston and carefully compress it. Do not use a screwdriver or other inappropriate tool to compress the piston, as this can damage the piston or caliper. Turn the piston slowly and evenly. You may need to twist it slightly as you compress it.
* Watch for Brake Fluid: As you compress the piston, brake fluid will be displaced. Make sure the brake fluid reservoir is not overfilled. If it is close, you may need to carefully siphon some fluid out to prevent overflow.
6. Remove the Old Brake Pads: Once the piston is compressed enough, the old brake pads should slide out. You may need to carefully pry them out.
7. Clean the Caliper and Slides: Use a wire brush or sandpaper to clean any rust or debris from the caliper mounting bracket and caliper slide pins. Clean thoroughly with brake cleaner.
8. Install the New Brake Pads: Carefully slide the new brake pads into place.
9. Reinstall the Caliper: Carefully reinstall the caliper onto the rotor, making sure the pins and slides are properly lubricated (use a high-temperature brake caliper grease). Tighten the caliper bolts to the manufacturer's specifications.
10. Reinstall the Wheel: Put the wheel back on and tighten the lug nuts. Lower the vehicle from the jack stands.
11. Tighten Lug Nuts: After the vehicle is on the ground, give the lug nuts a final, even tightening with the lug wrench.
12. Pump the Brakes: Before driving, pump the brake pedal several times to ensure the pads are making proper contact with the rotor.
13. Test Drive: Take a short test drive to make sure the brakes are working correctly.
Important Notes:
* Consult your owner's manual: Your owner's manual may have specific instructions for your vehicle.
* Brake Fluid: If you need to replace brake fluid, follow the proper procedure for your vehicle. Air in the brake lines can lead to brake failure.
* Rotor Inspection: Inspect the rotors for wear and tear. If they are worn or damaged, they should be replaced at the same time as the brake pads.
* Professional Help: If you are unsure about any part of this process, it is best to have a qualified mechanic perform the brake pad replacement. Your safety is paramount.
This is a general guide. Specific steps and tools may vary slightly depending on your 2004 Jeep Grand Cherokee's trim level and configuration. Always prioritize safety and consult your owner's manual for specific instructions.
