how to convert drum brakes to disk brakes

How to Convert Drum Brakes to Disk Brakes A Comprehensive Guide

Upgrading your vehicle's braking system is a common modification among car enthusiasts. One of the most effective upgrades is converting drum brakes to disc brakes. While drum brakes are adequate for regular driving, disc brakes offer superior stopping power, better heat dissipation, and enhanced performance. If you’re considering this upgrade, follow this comprehensive guide to help you through the conversion process.

Understanding the Differences

Before diving into the conversion process, it's essential to understand the differences between drum and disc brakes. Drum brakes use a set of shoes that press against a cylindrical drum, while disc brakes utilize a caliper that squeezes brake pads against a rotating disc or rotor. Disc brakes typically provide better braking performance, particularly in high-stress situations like towing, performance driving, or driving in hilly terrains.

Tools and Materials Needed

1. Tools - Jack and jack stands - Wrench and socket set - Brake line wrench - Screwdrivers - Torque wrench - C-clamp or brake caliper tool - Brake cleaner

2. Materials - Disc brake conversion kit (includes rotors, calipers, brackets, and hardware) - New brake lines (if necessary) - Brake fluid - Brake pads compatible with the new calipers

1. Safety First Begin by ensuring your vehicle is parked on a flat surface. Engage the parking brake and place wheel chocks behind the rear wheels. Use the jack to lift the front or rear of the vehicle, depending on which brakes you are converting, and secure it with jack stands.

2. Remove the Existing Drum Brakes - Remove the wheels to access the drum brakes. - Take off the drum assembly carefully to avoid damaging any components. - Disconnect the brake line from the wheel cylinder and remove the brake shoes and hardware.

3. Prepare for the Disc Brake Assembly - Remove the backing plate that held the drum components. Be sure to keep the hardware and old brake lines in case you need them for comparisons. - Inspect the spindle and ensure it’s in good condition; replace it if necessary.

4. Install the Disc Brake Conversion Kit - Start by installing the new brackets that came with your conversion kit. Ensure they are aligned correctly according to the manufacturer's instructions. - Position the new rotors onto the hub and secure them. Depending on your kit, you may need to use bolts to fasten the rotors tightly. - Install the calipers onto the bracket, ensuring they are positioned to align with the new rotors.

5. Connect Brake Lines - Attach new brake lines or adapt the existing ones to connect to the calipers. Ensure all fittings are tight to prevent leaks. - If your vehicle originally had rear drum brakes, check if the master cylinder needs upgrading. Drum and disc brakes require different levels of hydraulic pressure.

6. Install Brake Pads - Place the brake pads into the caliper brackets and ensure they fit securely against the rotors.

7. Bleed the Brake System - Fill the brake lines with brake fluid. Start bleeding from the wheel furthest from the master cylinder, typically the rear passenger side, working your way forward. - Use a brake bleeder tool or have an assistant pump the brake pedal while you release the bleeder valve until no air bubbles emerge.

8. Reassemble and Test - Reinstall the wheels and lower the vehicle. - Carefully test the brakes in a safe area at low speeds to ensure they function properly.

Conclusion

Converting from drum to disc brakes can significantly improve your vehicle's braking performance. This guide provides a fundamental overview, but always refer to the specific instructions from your conversion kit manufacturer. If you're unsure or uncomfortable with any part of the process, consider consulting a professional mechanic. With the right tools, materials, and knowledge, you can enhance your vehicle’s safety and performance with this upgrade.