how to replace drum brakes with disc brakes

How to Replace Drum Brakes with Disc Brakes

If you're looking to upgrade your vehicle's braking system, replacing drum brakes with disc brakes can significantly enhance your car's performance, safety, and reliability. While the process can be quite technical, with the right tools, parts, and a bit of patience, it's a manageable DIY project. Below, you'll find a comprehensive guide to help you tackle this significant upgrade.

Understanding the Differences

Before diving into the replacement process, it's important to understand the key differences between drum and disc brakes. Drum brakes consist of a cylindrical drum that rotates with the wheel, while disc brakes employ a flat disc that clamps down with brake pads. Disc brakes generally offer better heat dissipation, improved stopping power, and less brake fade, making them a preferred choice for high-performance vehicles.

Tools and Materials Needed

1. Tools - Car jack and jack stands - Lug wrench - Socket set - Brake line wrench - Torque wrench - Screwdrivers (flathead and Phillips) - Pliers

2. Materials - Replacement disc brake kit (includes rotors and calipers) - Brake pads - Brake fluid - Brake lines (if necessary) - Anti-seize grease

Step-by-Step Guide

Step 1 Safety First

Before starting, ensure you work in a well-ventilated area. Wear safety goggles and gloves to protect yourself from dirt and brake dust. Always take proper safety precautions to avoid accidents.

Step 2 Lift the Vehicle

Using a car jack, lift the front or rear of your vehicle (depending on which axle you are converting). Secure it with jack stands to ensure it doesn’t fall.

Step 3 Remove the Wheel

Using the lug wrench, remove the wheel bolts and take off the wheel to expose the drum brake assembly.

Step 4 Take Off the Drum Brakes

Remove the brake drum by unscrewing the retaining screws and pulling the drum off the hub. If it’s stuck, gently tap it with a hammer to loosen it. Once the drum is off, you'll see the brake shoes and hardware inside.

Step 5 Disconnect the Brake Components

Carefully disconnect the brake line from the wheel cylinder using the brake line wrench. Be prepared for some brake fluid to leak out and have a container ready to catch it. Then, remove the brake shoes, springs, and any other hardware.

Step 6 Install the Disc Brake Bracket

Your disc brake conversion kit should include a bracket that attaches to the rear axle’s mounting points. Install this bracket according to the kit’s instructions, ensuring it’s securely fastened.

Step 7 Attach the Calipers

Install the calipers onto the brackets. Make sure to align them properly and secure them with the bolts provided in your kit. Follow the manufacturer’s specifications for torque settings to ensure everything is tightened to the correct level.

Step 8 Install the Rotors

Next, slide the new rotors over the wheel hub. If your kit includes hardware, ensure it's properly fitted according to the instructions.

Step 9 Connect the Brake Lines

Now you’ll reconnect the brake lines to the calipers. Make sure the connections are tight to prevent leaks. After this, bleed the brake lines to remove any air bubbles in the system, using either a one-person bleed kit or with a partner.

Step 10 Install the Brake Pads

Insert the brake pads into the calipers, ensuring they fit snugly. Apply a bit of anti-seize grease to the backing of the pads to reduce noise and allow for smooth operation.

Step 11 Reassemble the Wheel

Once everything is in place, put the wheel back on. Secure it tightly with the lug nuts and lower the vehicle back to the ground.

Step 12 Test Your Brakes

Before hitting the road, pump the brake pedal a few times to ensure the pads seat correctly against the rotors. Check for any leaks around the brake lines and make sure everything feels tight.

Final Thoughts

Upgrading from drum brakes to disc brakes can enhance your vehicle's braking performance significantly. Proper installation and maintenance are crucial for safety and efficiency. If you're unsure of any step, consulting a professional mechanic is advisable. With time and diligence, you can enjoy the improved handling and safety that disc brakes provide. Happy driving!