how to convert rear drum brakes to disc brakes

Converting Rear Drum Brakes to Disc Brakes A Comprehensive Guide

The braking system of any vehicle is one of the most critical features for safety and performance. While drum brakes have been a staple in automotive design for decades, many enthusiasts and mechanics seek to convert rear drum brakes to disc brakes for several reasons, including better performance, improved heat dissipation, and more straightforward maintenance. This article will provide step-by-step guidance on how to convert rear drum brakes to disc brakes, ensuring you have the information needed for a successful upgrade.

Understanding the Benefits

Before diving into the conversion process, it’s essential to understand why you might want to make this upgrade

1. Improved Stopping Power Disc brakes generally provide better stopping power compared to drum brakes due to their design, which allows for more effective force application. 2. Better Heat Dissipation Disc brakes dissipate heat more efficiently than drum brakes. High temperatures can lead to brake fade, which diminishes braking ability. This is particularly important in high-performance or heavy-use vehicles.

3. Reduced Maintenance The maintenance for disc brakes is often less frequent and more straightforward than for drum brakes, leading to long-term savings.

4. Aesthetic Appeal Many car enthusiasts prefer the look of disc brakes, as they can offer a sporty appearance and are often more visually pleasing through alloy wheels.

Tools and Materials Needed

To successfully convert your rear drum brakes to disc brakes, ensure you have the following tools and materials

- New disc brake kit (including rotors, calipers, brackets, and pads) - Appropriate brake lines (may need to be modified or replaced) - Brake fluid - Jack and jack stands - Wrenches and sockets - Brake cleaner - Torque wrench - Safety goggles and gloves

Step-by-Step Conversion Process

1. Preparation Start by ensuring your vehicle is parked on a flat surface. Activate the handbrake and use wheel chocks to prevent rolling.

2. Remove Rear Wheels Using the appropriate wrench, loosen and remove the lug nuts on the rear wheels. Once loose, lift the rear of the vehicle with a jack and secure it on jack stands. This will provide safe access to the rear brake components.

3. Remove the Existing Drum Brakes Take off the drum by removing the retaining screws and pulling the drum off the wheel hub. You may need to tap it gently with a hammer if it’s stuck. Once the drum is off, remove the brake shoes and other components within the drum assembly.

4. Prepare the Axle for Disc Brakes Clean the axle hub thoroughly to remove any debris or rust. Check for damage and ensure the surface is smooth.

5. Install the Brake Bracket Most disc brake conversion kits come with a mounting bracket that needs to be installed first. Follow the manufacturer’s instructions for installation. This often involves bolting the bracket directly to the axle using the existing hardware.

6. Install the Rotors Place the new brake rotors onto the hub, ensuring that they seat properly against the bracket. Some kits may require you to remove the old dust shield as it could interfere with the rotor installation.

7. Mount the Calipers Attach the brake calipers to the mounting brackets. Ensure the calipers align correctly with the rotors and are securely fastened. Follow the manufacturer’s torque specifications for tightening the bolts.

8. Connect Brake Lines If your kit includes new brake lines, install them now. Ensure there are no kinks in the lines, and they are securely fastened to avoid leaks.

9. Install Brake Pads Insert the brake pads into the calipers. Make sure they are seated properly against the rotors.

10. Fill the Brake Fluid Once everything is secured and in place, fill the brake system with fresh brake fluid. Carefully bleed the brakes to remove any air trapped in the lines. This is crucial for ensuring effective brake performance.

11. Reassemble the Wheels Place the rear wheels back on and hand-tighten the lug nuts. Lower the vehicle and then tighten the lug nuts to the manufacturer's specifications.

12. Final Checks Before driving, pump the brake pedal several times to seat the pads correctly. Check for any leaks or unusual noises.

Conclusion

Converting rear drum brakes to disc brakes is a worthy investment that can enhance your vehicle's safety and performance. While the process may seem daunting, following these steps methodically can lead to successful results. Always consult your vehicle's service manual and consider professional assistance if you're unsure about any steps in the conversion process. Enjoy your enhanced braking performance!