Here's a general overview. Specific steps and tools may vary slightly depending on whether you have front or rear disc brakes (most likely front disc, rear drum). Always consult a repair manual specific to your 2004 Oldsmobile Alero for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
General Steps (for front disc brakes – most common):
1. Safety First: Engage the parking brake firmly. Use jack stands to securely lift the vehicle. Never work under a car supported only by a jack. Wear safety glasses.
2. Remove the Wheel: Remove the wheel using a lug wrench.
3. Disconnect the Caliper:
* Brake Line: Carefully loosen the brake line fitting at the caliper using a wrench. Have a container ready to catch any brake fluid that may spill. You may need a flare nut wrench for this.
* Caliper Bolts: Locate and remove the bolts holding the caliper to the caliper bracket. These are usually two bolts.
4. Compress the Piston: Use a caliper piston compression tool to push the piston back into the caliper. This creates space to install the new caliper. Be very careful not to damage the piston or seals.
5. Remove the Old Caliper: Carefully remove the old caliper from the bracket.
6. Inspect Components: Examine the brake pads, rotors, and caliper bracket for wear or damage. Replace as needed.
7. Install the New Caliper: Install the new caliper onto the bracket, ensuring it's correctly aligned. Tighten the caliper bolts to the manufacturer's specified torque.
8. Reconnect the Brake Line: Carefully reconnect the brake line to the new caliper. Tighten the fitting securely. Bleed the brakes after this step (see below).
9. Install New Pads (If Needed): Install new brake pads, if replacing them.
10. Reinstall the Wheel: Reinstall the wheel and tighten the lug nuts. Lower the vehicle.
11. Bleed the Brakes: This crucial step removes air from the brake lines. You'll need a brake bleeder kit and a helper. Follow the bleeding procedure outlined in your repair manual. Air in the brake lines can significantly reduce braking performance.
For Rear Drum Brakes (If Applicable):
The procedure for rear drum brakes is different. You'll need to remove the drum, then work with the wheel cylinder and adjusters. This is generally more involved and requires specialized tools.
Important Considerations:
* Brake Fluid: Use the correct type of brake fluid specified for your vehicle.
* Torque Specifications: Tighten all bolts and fittings to the manufacturer's specified torque. Using a torque wrench is crucial to prevent damage.
* Brake Pad Wear: Check brake pad thickness. If they're worn, replace them.
* Rotor Condition: Inspect the rotor for scoring, grooves, or excessive wear. Resurface or replace as needed.
Again, this is a simplified overview. Refer to a repair manual specific to your 2004 Oldsmobile Alero for complete and accurate instructions. If you are not comfortable performing this repair, take your vehicle to a qualified mechanic. Brake failure can be life-threatening.
