Brake Caliper - Front

Remove and replace the front brake caliper on a 1992 Dodge Viper, including brake line disconnection, caliper removal, and system bleeding.

Warnings

Tools required

Parts

• Front brake caliper (left or right as needed) × 1 — Use OEM specification
• Brake line copper crush washers × 2 — Use OEM specification
• Threadlocker (medium strength) × 1 — Loctite 242 or equivalent
• Shop rags × 5 — Generic

Fluids

• DOT 3 brake fluid — 0.5 qt

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Place wheel chocks behind rear wheels.
3. Using a turkey baster or fluid extractor, remove approximately half the brake fluid from the master cylinder reservoir to prevent overflow when compressing caliper pistons. Dispose of old fluid properly.
4. Loosen wheel lug nuts on the wheel where caliper replacement is needed while vehicle is on ground.
5. Raise front of vehicle with floor jack at manufacturer-specified jacking point.
6. Secure vehicle on jack stands rated for at least 3,500 lbs. Lower jack so weight rests fully on stands.
7. Remove wheel completely and set aside.
8. Inspect brake rotor, pads, and brake line for damage or excessive wear. Address any issues before proceeding.

Procedure

1. 1

   Prepare brake line disconnection
   Place shop rags or a drain pan beneath the brake caliper to catch brake fluid. Have the new copper crush washers ready. Identify the brake line banjo bolt on the rear of the caliper where the flexible brake hose connects.
2. 2

   Disconnect brake line from caliper
   Using the correctly sized wrench (verify banjo bolt size against factory spec), loosen and remove the brake line banjo bolt from the rear of the caliper. Brake fluid will immediately begin to drain. Allow the caliper and brake line to drain into the rags or pan. Remove and discard both copper crush washers from the banjo fitting (one on each side of the banjo). Immediately plug the brake line opening with a clean rubber cap or wrap tightly with plastic wrap and tape to minimize fluid loss and air entry.
   ⚠Brake fluid will spray when the banjo bolt is loosened. Keep fluid away from painted surfaces and your eyes.
   Torque spec

   Brake Line Banjo Bolt31 Nm (23 lb-ft)
3. 3

   Remove caliper mounting bolts
   Locate the two caliper bracket bolts that secure the caliper assembly to the steering knuckle/hub. These are large bolts accessed from the rear of the caliper bracket. Using an 18mm socket and breaker bar if necessary, loosen and remove both caliper bracket bolts completely. If bolts are seized, apply penetrating oil and allow to soak for 10-15 minutes before attempting removal.
   Torque spec

   Caliper Bracket Bolts120 Nm (88 lb-ft)
4. 4

   Remove caliper assembly
   With both mounting bolts removed, carefully slide the fixed caliper off the brake rotor and lift it away. Note the 1992 Viper uses a Brembo fixed (opposed-piston) caliper that bolts directly to the steering knuckle. If the caliper is stuck, gently work it free by hand—never pry against the rotor. Set the old caliper aside on a protected surface.
5. 5

   Inspect mounting surfaces and rotor
   Clean the caliper mounting surface on the steering knuckle with brake parts cleaner. Inspect the brake rotor for scoring, warping, or excessive wear. Check rotor thickness against the manufacturer's specification stamped on the rotor or listed in the Chrysler service manual (verify exact minimum thickness before machining or reuse). Verify the rotor surface is clean and free of grease or brake fluid contamination.
6. 6

   Prepare new caliper
   Remove the new caliper from its packaging. Verify it matches the old caliper (left vs. right side, bleeder screw position). Ensure the caliper pistons are fully retracted. On this fixed opposed-piston caliper, gently press each piston back into its bore individually using a suitable pad spreader or flat tool, taking care not to damage the piston boots. Apply a thin coat of clean brake fluid to the piston seals if visible.
7. 7

   Apply threadlocker to bracket bolts
   Clean the threads of both caliper bracket bolts with brake parts cleaner and allow to dry. Apply medium-strength threadlocker (Loctite 242 or equivalent) to the threads of both bolts, covering approximately the first 3/4 of the threaded length. Do not apply threadlocker to the bolt heads or mounting surfaces.
   Torque spec

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

   Install new caliper assembly
   Position the new caliper assembly over the brake rotor, aligning the bracket mounting holes with the steering knuckle. Insert both caliper bracket bolts by hand and thread them in several turns to ensure proper thread engagement. Do not cross-thread the bolts.
9. 9

   Torque caliper bracket bolts
   Using a torque wrench and the correct socket, tighten both caliper mounting bolts to the factory-specified torque (verify exact value in the Chrysler service manual before final tightening) in an alternating pattern. Tighten one bolt partially, then the other, then return to torque both to final specification. This is a CRITICAL torque specification—under-torquing can result in caliper detachment and total brake failure.
   ⚠️Caliper bracket bolts MUST be torqued to exactly 120 Nm (88 lb-ft). Failure to properly torque can result in caliper detachment and complete loss of braking.
   Torque spec

   Caliper Bracket Bolts120 Nm (88 lb-ft)
10. 10

    Reconnect brake line
    Remove the protective plug or wrap from the brake line. Install one NEW copper crush washer onto the banjo fitting, insert the banjo into the caliper port, install the second NEW copper crush washer, and thread the banjo bolt by hand. Using a 15mm wrench and torque wrench, tighten the banjo bolt to 31 Nm (23 lb-ft). Verify the brake line is not kinked or twisted and has adequate clearance from the wheel and suspension components throughout the steering range.
    ⚠️CRITICAL: Always use NEW copper crush washers. Reusing old washers will result in brake fluid leaks and potential brake failure. Torque banjo bolt to exactly 31 Nm (23 lb-ft).
    Torque spec

    Brake Line Banjo Bolt31 Nm (23 lb-ft)
11. 11

    Bleed brake caliper
    Attach a clear hose to the caliper bleeder screw and place the other end in a catch bottle partially filled with clean DOT 3 brake fluid. Have an assistant pump the brake pedal 3-4 times and hold firm pressure. Using an 8mm wrench, open the bleeder screw 1/4 to 1/2 turn. Fluid and air will flow into the hose. When flow stops, close the bleeder screw before the assistant releases the pedal. Repeat this process until clear, bubble-free fluid flows. Check and refill the master cylinder reservoir frequently during bleeding—never allow it to run dry or air will enter the system.
    ⚠️Never allow the master cylinder reservoir to run empty during bleeding. Air entry requires bleeding the entire brake system including ABS unit.
    Torque spec

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

    Final bleeder screw torque
    After bleeding is complete and only clear, bubble-free fluid emerges, close the bleeder screw and torque to 10 Nm (7 lb-ft) using a torque wrench and 8mm wrench. Do not overtighten—the bleeder screw is easily damaged.
    ⚠Bleeder screws are fragile. Overtightening beyond 10 Nm (7 lb-ft) can strip threads or snap the screw, requiring caliper replacement.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
13. 13

    Check brake pedal feel
    With the engine off, pump the brake pedal several times. The pedal should become firm and hold pressure. If the pedal feels spongy or sinks to the floor, air remains in the system—repeat bleeding process. Top off the master cylinder reservoir to the MAX line with fresh DOT 3 brake fluid and install the reservoir cap.
14. 14

    Reinstall wheel
    Clean the wheel hub surface and wheel mounting surface. Position the wheel onto the hub and thread all lug nuts by hand. Using a 21mm socket, tighten the lug nuts in a star pattern while the vehicle is still on jack stands, but do not torque to final specification yet.
15. 15

    Lower vehicle and final torque
    Raise the vehicle slightly with the floor jack to unload the jack stands. Remove jack stands and carefully lower the vehicle to the ground. With the vehicle weight on the wheels, torque the wheel lug nuts to the factory-specified torque (verify exact value in the Chrysler service manual) in a star pattern using a torque wrench and the correct socket.

Reassembly

1. Reinstallation is covered in the procedure steps above as this is a replacement job, not a disassembly/reassembly.

Verification

• With the engine running, pump the brake pedal several times. The pedal should feel firm and return to normal height. There should be no pedal fade or sponginess.
• Inspect all brake line connections and the caliper body for any signs of brake fluid leakage. Wipe connections dry and recheck after pedal pumping.
• Before driving, perform a stationary brake test: with the engine running and vehicle in gear (assistant holding brake or parking brake engaged), apply firm brake pressure and verify the pedal holds without sinking.
• Perform a low-speed test drive in a safe area (empty parking lot). Test brakes at 5-10 mph to verify proper operation before returning to normal driving.
• After the first 50-100 miles, re-check the caliper bracket bolt torque to ensure bolts have not loosened.
• Monitor brake pedal feel and check for leaks after 24 hours and again after one week of driving.

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