This procedure covers removal and installation of the front brake calipers on a 1966 Chevrolet Corvette with the 327ci V8, including brake line disconnection, caliper bracket removal, and system bleeding.

Warnings

Tools required

Parts

• Front brake caliper assembly × 1 — Use OEM specification or quality aftermarket
• Brake line copper crush washers (banjo bolt) × 2 — Use OEM specification
• Caliper mounting bracket bolts (if corroded) × 2 — Use OEM specification
• Brake pads (if worn or contaminated) × 1 — Use OEM specification

Fluids

• DOT 4 Brake Fluid — 1 qt

Preparation

1. Park vehicle on level ground and place transmission in Park (automatic) or first gear (manual). Apply parking brake.
2. Loosen front wheel lug nuts 1/4 turn while vehicle is on the ground.
3. Using a turkey baster or fluid syringe, remove approximately half the brake fluid from the master cylinder reservoir to prevent overflow when compressing caliper pistons. Dispose of old fluid properly.
4. Raise front of vehicle with floor jack and support securely on jack stands placed under the frame rails. Never work under a vehicle supported only by a jack.
5. Remove front wheel completely and set aside.
6. Inspect brake rotor, pads, and caliper condition to determine if additional parts are needed.

Procedure

1. 1

   Prepare brake line disconnection
   Place a drain pan under the caliper to catch brake fluid. Clean the area around the brake line banjo bolt connection on the back of the caliper using a wire brush to remove dirt and corrosion. This prevents contamination when the line is opened.
2. 2

   Disconnect brake line from caliper
   Using a 9/16" box wrench or flare nut wrench, carefully loosen and remove the banjo bolt that connects the brake line to the rear of the caliper. Brake fluid will drain out. Remove and discard both copper crush washers from either side of the banjo fitting. Immediately plug the open brake line with a rubber cap or wrap with plastic and tape to minimize fluid loss and prevent contamination. Do not allow the brake line to hang unsupported.
3. 3

   Remove caliper mounting bolts
   The 1966 Corvette front caliper uses two through-bolts that pass through the caliper body and thread into the caliper mounting bracket. These are located at the top and bottom of the caliper assembly. Using a 1/2" socket and ratchet, remove both caliper mounting bolts completely. Support the caliper with your hand as you remove the second bolt to prevent it from falling.
4. 4

   Remove caliper from bracket
   Carefully slide the caliper assembly off the brake rotor and away from the mounting bracket. The brake pads may come with the caliper or remain in the bracket. If the caliper was not being replaced, you would secure it with wire or a bungee cord to avoid stressing the brake hose, but since the line is disconnected, set the old caliper aside in the drain pan.
5. 5

   Remove caliper bracket (if necessary)
   If the caliper mounting bracket requires removal for replacement or rotor service, remove the two large bracket-to-spindle bolts using a 3/4" socket and breaker bar. These bolts are torqued to 120 Nm and may require significant force to loosen. Remove the bracket from the spindle. If not servicing the bracket, proceed to the next step.
6. 6

   Inspect and clean mounting surfaces
   Inspect the caliper mounting bracket for wear, cracks, or damage. Check the brake rotor for scoring, excessive wear, or warping. Clean the caliper bracket sliding surfaces with a wire brush. Clean the spindle mounting face if the bracket was removed. Inspect brake pad hardware and replace if worn. This is an ideal time to replace brake pads if they show wear.
7. 7

   Install caliper bracket (if removed)
   If the bracket was removed, position it onto the spindle and install both bracket mounting bolts. Apply blue threadlocker to the bolt threads as recommended. Tighten the bracket bolts in a cross pattern to the specified torque of 120 Nm (88 lb-ft) using a torque wrench.
   Torque spec

   Caliper Bracket Bolts120 Nm (88 lb-ft)
8. 8

   Prepare new caliper for installation
   Remove the new caliper from its packaging. Verify it matches the old caliper design and has the same banjo bolt port location. If the caliper does not come with brake pads installed, install the brake pads into the caliper or bracket according to the pad design. Ensure all pad hardware clips and anti-rattle springs are correctly positioned. Using a C-clamp or brake piston compression tool, fully retract the caliper piston(s) into the bore to provide clearance for installation over the brake rotor.
9. 9

   Install new caliper onto bracket
   Carefully slide the new caliper assembly over the brake rotor and align the caliper mounting holes with the threaded holes in the mounting bracket. Ensure the brake pads are correctly positioned on either side of the rotor. Insert both caliper mounting bolts and hand-thread them to prevent cross-threading. Once both bolts are started, tighten them evenly using a socket and ratchet. Torque to manufacturer specification (typically 35-40 lb-ft for 1966 Corvette front caliper mounting bolts, though this exact specification should be verified).
10. 10

    Connect brake line to new caliper
    Install one NEW copper crush washer onto the banjo fitting, then position the brake line banjo fitting onto the caliper inlet port. Install the second NEW copper crush washer on the outside, then insert the banjo bolt through the assembly. Hand-thread the banjo bolt into the caliper body. Using a torque wrench and 9/16" socket or box wrench, tighten the banjo bolt to exactly 25.0 Nm (18 lb-ft). Do not overtighten as this can strip the aluminum caliper body. Verify the brake line is not twisted or kinked.
    Torque spec

    Brake Line Banjo Bolt25 Nm (18 lb-ft)
11. 11

    Bleed the brake caliper
    Locate the bleeder screw on the top rear of the caliper body. Clean around the bleeder screw. Attach a clear plastic tube (3/16" inside diameter) to the bleeder nipple and place the other end into a clean container partially filled with fresh DOT 4 brake fluid. Have an assistant sit in the driver's seat. Refill the master cylinder reservoir to the MAX line with fresh DOT 4 brake fluid. Instruct your assistant to slowly pump the brake pedal 3-4 times and hold firm pressure on the pedal. While pressure is held, open the bleeder screw 1/4 to 1/2 turn using a 5/16" or 8mm box wrench. Brake fluid and air bubbles will flow through the tube. When fluid flow stops, close the bleeder screw snugly before your assistant releases the pedal. Repeat this process until no air bubbles appear in the tube and only clean fluid flows. Check and refill the master cylinder frequently during bleeding to prevent air introduction. When bleeding is complete, tighten the bleeder screw to 10.0 Nm (7 lb-ft).
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
12. 12

    Reinstall wheel and lower vehicle
    Reinstall the front wheel onto the hub, ensuring the wheel is seated flat against the hub face. Install all lug nuts and tighten in a star pattern by hand. Lower the vehicle until the tire just contacts the ground but the suspension is not fully loaded. Torque the lug nuts to 80-100 lb-ft (typical for 1966 Corvette) in a star pattern using a torque wrench. Fully lower the vehicle and remove the jack stands and floor jack.

Reassembly

1. If replacing both front calipers, repeat the entire procedure on the opposite side before final bleeding and testing.
2. After both calipers are installed and individually bled, perform a final system bleed starting from the caliper furthest from the master cylinder (right rear, left rear, right front, left front for conventional bleeding sequence).
3. Top off the master cylinder reservoir to the MAX line with fresh DOT 4 brake fluid and install the reservoir cap securely.
4. Before moving the vehicle, pump the brake pedal firmly 10-15 times until it feels firm and does not sink to the floor. If the pedal feels soft or spongy, additional bleeding is required.

Verification

• With the engine off, pump the brake pedal multiple times. The pedal should become firm and maintain pressure without sinking. If the pedal remains soft, air is still in the system and further bleeding is required.
• Visually inspect all brake line connections for leaks. Look for wet spots or dripping fluid at the banjo bolt connection and bleeder screw.
• Start the engine and apply firm brake pressure. The pedal should feel solid with no excessive travel. Check again for leaks at all connections.
• In a safe, open area with no traffic, test the brakes at low speed (5-10 mph) to verify proper operation. The vehicle should stop smoothly without pulling to one side.
• Perform several moderate stops from 20-30 mph to seat the brake pads and verify normal operation.
• After test driving, recheck the master cylinder fluid level and top off if needed. Recheck all connections for leaks.
• If the vehicle pulls to one side during braking, uneven pad contact or air in the system may be present. Do not drive at highway speeds until the problem is diagnosed and corrected.

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