how to convert drum to disc brakes

3 min read 18-01-2025

Meta Description: Upgrading your vehicle's braking system? Learn how to convert drum to disc brakes with our comprehensive guide. We cover everything from choosing the right kit to installation tips and safety precautions. Improve your stopping power and safety today!

Introduction: The Advantages of Disc Brakes

Drum brakes, while functional, have limitations compared to modern disc brakes. Disc brakes offer superior stopping power, especially in wet conditions. They also tend to fade less under heavy use. Upgrading from drum to disc brakes is a significant improvement for safety and performance. This guide will walk you through the conversion process. This project requires mechanical aptitude and some specialized tools. If you're unsure about any step, consult a professional mechanic.

Choosing the Right Disc Brake Conversion Kit

The first step is selecting a suitable conversion kit. Many reputable manufacturers offer kits specifically designed for various vehicle makes and models. These kits typically include everything you need: calipers, rotors, pads, brackets, and potentially lines and hardware.

Factors to Consider:

Vehicle Compatibility: Ensure the kit is explicitly designed for your car's year, make, and model. Incorrect parts can lead to serious safety issues.
Brake Caliper Type: Several types exist (single-piston, dual-piston, etc.). Research your vehicle's requirements and limitations regarding caliper size and piston count.
Rotor Size: Larger rotors generally provide better stopping power. However, ensure they fit within your wheel wells.
Kit Completeness: Some kits are more comprehensive than others. Check if it includes everything you need, or if you'll have to source additional parts.

Researching and Sourcing Parts

Thoroughly research different brands and kits before committing to a purchase. Read online reviews and compare prices. Reputable brands often provide detailed installation instructions and support. Websites like Amazon, eBay, and specialized automotive parts retailers are great places to start your search.

Tools and Materials Needed

Before you begin, gather all necessary tools and materials. This list may vary depending on your specific kit and vehicle:

Disc Brake Conversion Kit: This is the core of your project.
Wheel Wrench: For removing and installing your wheels.
Jack and Jack Stands: To safely lift and support your vehicle.
Socket Wrench Set: To remove and install various bolts and nuts.
Wrench Set: For various sized bolts and nuts.
Brake Caliper Wind Back Tool: To compress brake pistons.
Torque Wrench: Crucial for tightening bolts to the manufacturer's specifications.
Bleeder Wrench: For bleeding the brake system after installation.
Brake Fluid: Use DOT 3 or DOT 4 brake fluid, as specified by your kit's instructions.
Gloves: Protect your hands from grease and brake fluid.
Safety Glasses: Protect your eyes from debris and fluid splashes.
Shop Rags: For cleaning and wiping up spills.

Step-by-Step Disc Brake Conversion Process

This is a general outline; specific steps may vary depending on your kit and vehicle. Always consult your kit's instructions.

1. Preparation:

Park your vehicle on a level surface, engage the parking brake, and chock the wheels.
Consult your vehicle's repair manual for specific procedures and torque specifications.
Disconnect the battery's negative terminal to prevent electrical shorts.

2. Removing the Wheels and Drum Brakes:

Remove the wheels.
Carefully remove the drum brake assembly following your vehicle's specific instructions. This often involves removing brake shoes, wheel cylinders, and other components.

3. Installing the New Brake System Components:

Install the new disc brake brackets securely, according to the kit instructions. Pay close attention to torque specifications.
Mount the new brake rotors onto the wheel hubs.
Install the calipers, ensuring they are properly aligned and secured.
Install new brake pads into the calipers.

4. Bleeding the Brakes:

Attach a bleeder wrench to each caliper's bleeder screw.
Open the bleeder screws one at a time and pump the brake pedal several times to remove air from the lines. This requires assistance from another person to pump the brake pedal while you open and close the bleeder screws.
Ensure all air is removed and the brake pedal feels firm.

5. Reassembly:

Install the wheels.
Reconnect the battery's negative terminal.

6. Testing:

Before driving, carefully test the brakes in a safe, controlled environment. Ensure the brakes function correctly before driving on public roads.

Post-Installation Checks and Maintenance

After installation, perform the following:

Brake Pedal Feel: Verify the brake pedal feels firm and responsive. A spongy feel indicates air in the lines, requiring further bleeding.
Brake System Integrity: Inspect the system regularly for leaks.
Brake Pad Wear: Monitor brake pad wear and replace them as needed.

Conclusion: Enhanced Safety and Performance

Converting your drum brakes to disc brakes enhances your vehicle's stopping power and safety. This upgrade offers improved performance, particularly in wet conditions. Remember, careful planning, the right tools, and adherence to safety procedures are crucial. If you're unsure about any part of the process, seek professional help from a qualified mechanic. Enjoy the upgraded braking capabilities of your vehicle!