Brake Rotor - Rear Single

Remove and replace a single rear brake rotor on a 1966 Corvette with rear disc brakes, including caliper removal and reassembly.

Warnings

Tools required

Parts

• Rear brake rotor × 1 — Use OEM specification or quality replacement for 1966 Corvette rear disc

Fluids

• DOT 4 Brake Fluid — 0.25 qt

Preparation

1. Park vehicle on level, solid ground and engage parking brake firmly
2. Place wheel chocks in front of both front wheels
3. Loosen rear wheel lug nuts 1/4 turn while vehicle is on the ground
4. Raise rear of vehicle with floor jack at rear axle or frame lifting point
5. Support vehicle securely on jack stands placed under the frame rails behind the rear axle
6. Remove wheel lug nuts completely and remove wheel
7. Spray penetrating oil on caliper mounting bolts and rotor set screws (if equipped) and allow to soak for 5-10 minutes

Procedure

1. 1

   Inspect brake system condition
   Visually inspect the brake caliper, rotor, brake pads, and brake hose for damage, leaks, or excessive wear. Check brake fluid level in master cylinder reservoir. If brake fluid is below the MIN line, fluid loss indicates a leak that must be repaired before proceeding. Note the position and routing of the brake hose for reassembly.
2. 2

   Compress brake caliper piston
   Using a C-clamp or brake caliper piston tool, slowly compress the caliper piston back into its bore. Place the clamp against the outboard brake pad backing plate and the back of the caliper body. Compress slowly to push brake fluid back into the master cylinder. This step creates clearance for caliper removal. Monitor the master cylinder reservoir and remove fluid with a turkey baster if it begins to overflow.
3. 3

   Remove caliper mounting bolts
   Locate the two caliper mounting bolts on the inboard side of the caliper that attach it to the spindle support bracket. These are typically 1/2" or 9/16" hex head bolts. Remove both caliper mounting bolts completely. Note the length and position of each bolt for reassembly.
4. 4

   Remove and support brake caliper
   Carefully lift the brake caliper assembly off the rotor. Do NOT disconnect the brake hose. Secure the caliper to the suspension or frame using wire or a bungee cord to prevent stress on the brake hose. Ensure the caliper is supported securely and the brake hose has no sharp bends or tension.
5. 5

   Remove brake pads and hardware
   Remove the inboard and outboard brake pads from the caliper or rotor mounting area. Note the position of any anti-rattle clips, shims, or pad retaining hardware for reinstallation. Set aside if reusing; inspect pads for even wear and minimum thickness (should be at least 1/8" of friction material remaining).
6. 6

   Remove rotor retaining hardware
   If equipped, remove any Phillips-head sheet metal screws or clips that retain the rotor to the wheel hub. These are typically 2 small screws. Many 1966 Corvettes with factory disc brakes do not use rotor retaining screws, as the wheel holds the rotor in place.
7. 7

   Remove brake rotor
   Pull the brake rotor straight off the wheel hub studs. If the rotor is stuck due to corrosion, tap gently around the rotor hat (center section) with a rubber mallet, alternating sides. Do NOT strike the friction surface. If severely corroded, spray penetrating oil around the hub-to-rotor interface and allow to soak, then retry. Thread bolts into the threaded holes in the rotor face (if equipped) to push the rotor off the hub.
8. 8

   Clean hub mounting surface
   Use a wire brush to thoroughly clean the wheel hub face where the rotor mounts. Remove all rust, scale, and debris to ensure the new rotor sits flat. Any debris or rust buildup will cause rotor runout and brake pulsation. Clean the hub studs with a wire brush as well.
9. 9

   Inspect wheel bearings
   With the rotor removed, inspect the inner wheel bearing and grease seal for proper lubrication and condition. Check for lateral play in the hub by grasping it at 12 and 6 o'clock and pushing/pulling. Excessive play indicates wheel bearing adjustment or replacement is needed. If bearings are dry, contaminated, or have play, wheel bearing service is required before installing the new rotor.
10. 10

    Install new brake rotor
    Clean the new rotor thoroughly with brake cleaner to remove any protective coating or oil from manufacturing. Slide the new rotor onto the wheel hub, aligning the holes with the hub studs. Ensure the rotor seats completely flat against the hub face. Install rotor retaining screws (if equipped) and tighten snugly.
11. 11

    Reinstall brake pads and hardware
    Install the inboard brake pad into the caliper piston. Install the outboard brake pad with its retaining ears properly positioned. Reinstall any anti-rattle clips or shims in their original positions. Ensure both pads move freely and are properly seated.
12. 12

    Reinstall brake caliper
    Remove the support wire or bungee cord from the caliper. Carefully position the caliper over the rotor and brake pads, aligning the mounting bolt holes with the spindle support bracket. Install both caliper mounting bolts and tighten in a cross pattern. Torque to manufacturer specification if known, or tighten firmly (estimated 70-80 ft-lbs for 1966 Corvette rear calipers).
13. 13

    Reinstall wheel and lower vehicle
    Reinstall the wheel onto the hub studs. Install lug nuts and tighten by hand until snug. Lower the vehicle until the tire just touches the ground but still supports most weight on the jack stands. Tighten lug nuts in a star pattern to proper torque specification (typically 80-100 ft-lbs for 1966 Corvette). Fully lower vehicle and remove jack stands.
14. 14

    Pump brake pedal and check operation
    Before moving the vehicle, pump the brake pedal slowly 10-15 times until it becomes firm. The first few pumps will move the caliper piston back out to contact the new rotor. The pedal should become firm and hold pressure. If the pedal sinks slowly or goes to the floor, there is a problem with the brake system that must be corrected before driving.
15. 15

    Check and top off brake fluid
    Open the hood and check the brake fluid level in the master cylinder reservoir. Add DOT 4 brake fluid as necessary to bring the level to the MAX or FULL line. Do not overfill. Securely install the reservoir cap.

Reassembly

1. Torque all fasteners to specification when available
2. Ensure caliper mounting bolts are tight and safety-wired if originally equipped
3. Verify brake hose has no kinks, twists, or tension
4. Confirm wheel lug nuts are torqued in proper star pattern

Verification

• Brake pedal should be firm and not sink when sustained pressure is applied with engine running
• Test brakes at low speed (under 10 mph) in a safe area before returning to normal driving
• Listen for any unusual noises such as grinding, squealing, or rubbing during initial brake applications
• Check for vibration or pulsation during braking which would indicate rotor runout or contamination
• After 50-100 miles, re-check lug nut torque and caliper mounting bolt torque
• After bedding-in period (200-300 miles of normal driving), verify no brake fluid leaks at caliper and master cylinder

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