Tools You'll Likely Need:
* Jack and jack stands: Essential for safely lifting the vehicle.
* Wheel chocks: To prevent the vehicle from rolling.
* Lug wrench: To remove the wheel.
* Wheel wrench (optional but recommended): For easier removal of lug nuts.
* Caliper compression tool: This is crucial to compress the caliper piston. A C-clamp can sometimes work, but a dedicated tool is safer and easier.
* Sockets and wrenches: Appropriate sizes for your caliper bolts and rotor retaining bolts (if any).
* Hammer (optional): Might be needed to gently tap the rotor loose.
* Penetrating oil (like PB Blaster): Helps loosen any rusted or stuck bolts.
* Gloves: To protect your hands.
Procedure:
1. Safety First: Park on a level surface, engage the parking brake, and chock the rear wheels. Use jack stands to securely lift the front of the vehicle after jacking it up. Never work under a vehicle supported only by a jack.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Compress the Caliper Piston: Using the caliper compression tool, carefully compress the caliper piston. This will give you enough space to remove the rotor. Be careful not to damage the piston seal or the caliper itself. Some brake fluids might leak; have a rag ready.
4. Remove the Caliper: Depending on your model, you might need to remove the caliper completely or just swing it out of the way. This usually involves removing one or two bolts securing the caliper to the caliper bracket. Once removed, carefully hang the caliper using a wire or bungee cord to keep it out of the way and prevent stress on the brake line.
5. Remove the Rotor: The rotor should now be relatively free. There may be a small retaining bolt on the back side of the rotor (this varies by model). Remove this if present. Sometimes the rotor is simply pressed onto the hub; it might require some gentle tapping with a hammer on the backside to loosen it. Avoid hitting the wheel studs. If it's stuck, use penetrating oil and let it sit for a while.
6. Clean and Inspect: Once the rotor is off, clean the mating surface of the hub thoroughly. Inspect the hub for any damage. Also, inspect the rotor's condition. If it's excessively worn or damaged, it needs replacement.
7. Installation (Reverse Order): Install the new rotor (if needed), then carefully reassemble everything in the reverse order of removal. Ensure the caliper is correctly seated, and the piston is fully compressed and not binding. Bleed the brakes after reassembly to ensure proper brake function.
Important Notes:
* Brake Fluid is Corrosive: Be careful not to get brake fluid on your paint or skin.
* Proper Torque: Use a torque wrench to tighten bolts to the manufacturer's specifications (found in your repair manual). Over-tightening can damage parts.
* Consult a Repair Manual: This guide provides a general overview. A repair manual specific to your 1991 Oldsmobile Cutlass Supreme will give you the most accurate and detailed instructions. This is especially crucial for determining the specific variations of your brake system.
If you're not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Brake work is crucial for safety, and it's better to be safe than sorry.
