how to convert drum brakes to disc

How to Convert Drum Brakes to Disc Brakes

Upgrading your vehicle's braking system from drum brakes to disc brakes is a popular modification and can significantly enhance overall braking performance, safety, and handling. Drum brakes are generally found on older vehicles and are often less efficient than their disc counterparts. Here’s a comprehensive guide on how to undertake this conversion.

Understanding the Benefits of Disc Brakes

Before diving into the conversion process, it’s essential to understand why many automotive enthusiasts opt for disc brakes

1. Enhanced Stopping Power Disc brakes provide better braking performance due to their ability to dissipate heat more effectively. This leads to better stopping power, especially under heavy use.

2. Improved Wet Weather Performance Disc brakes are less prone to water retention, which means they perform better in wet conditions. This characteristic is crucial for maintaining control during rain.

3. Reduced Brake Fade Because disc brakes cool down faster than drum brakes, they are less susceptible to brake fade under prolonged use, which can occur in downhill driving or repeated hard stopping.

4. Easier Maintenance Disc brakes are generally easier to inspect and replace than drum brakes, as they are more accessible.

Tools and Materials Needed

Before beginning the conversion, gather the necessary tools and materials - A complete disc brake conversion kit specific to your vehicle - Hydraulic jack and jack stands - Basic hand tools (wrenches, sockets, etc.) - Brake cleaner - New brake fluid - Shop manual for your vehicle (for reference during disassembly)

1. Safe Preparation

Securely raise your vehicle with a hydraulic jack and support it with jack stands. Ensure that the vehicle is on a flat surface, and set the parking brake.

2. Remove Existing Drum Brakes

Start by removing the rear wheels. Then, remove the drum brake components - Take off the drum by removing the retaining screws or clips. - Detach the brake shoes and all related hardware from the backing plate. - Carefully remove the backing plate if necessary; this often involves unbolting it from the rear axle.

3. Install the Disc Brake Components

After the drum brakes are removed, install the disc brake system - Mount the new disc brake caliper bracket to the rear axle using the provided bolts (check for specified torque values in your vehicle’s manual). - Install the brake rotor onto the wheel hub, ensuring it is seated correctly. - Attach the caliper to the bracket, and install the brake pads inside the caliper.

4. Brake Lines and Master Cylinder

Upgrade the brake lines for better fluid flow - Remove the old brake lines leading to the drum brake system and replace them with those provided in the conversion kit. - If the conversion necessitates a different master cylinder, replace it as well to accommodate the increased fluid volume required for disc brakes.

5. Bleeding the Brakes

Once everything is installed, the brake system must be bled to remove air from the lines - Start at the furthest caliper from the master cylinder and work your way forward. - Use a brake bleeder kit or the traditional method of having an assistant pump the brake pedal while you open and close the bleeder screws on each caliper.

6. Test the Brakes

Before taking your vehicle on the road, perform a thorough check - Ensure all bolts are tight and components are secured. - Push the brake pedal several times to ensure proper engagement. - Check for any leaks in the system.

Conclusion

Converting from drum brakes to disc brakes can be a rewarding project that enhances your vehicle's safety and performance. It’s important to follow each step carefully and to refer to your vehicle’s manual when necessary. If you’re uncomfortable performing the conversion yourself, consult with a professional mechanic. With the right tools and a bit of effort, you can enjoy the benefits of improved braking performance in your vehicle.