Converting the rear drum brakes of a 9th generation Toyota Corolla (2003-2008) to disc brakes is a popular modification among enthusiasts seeking improved braking performance and aesthetics. This guide will provide you with essential information on the conversion process, necessary parts, and tips for successful installation.

Understanding the Conversion

The primary reason for converting rear drum brakes to disc brakes is enhanced braking performance. Disc brakes generally provide better heat dissipation, reduced brake fade, and improved stopping power. Additionally, they offer easier maintenance compared to drum brakes.

Target Audience

This guide is aimed at car enthusiasts, DIY mechanics, and Corolla owners looking to upgrade their braking system. Readers are likely seeking detailed instructions, information on compatible parts, and insights into the benefits of such a conversion.

Parts Required for Conversion

To perform the conversion, you'll need parts from compatible vehicles. Here’s a list of recommended sources:

  • 2000-2005 Toyota Celica GTS
  • 2003-2006 Toyota Matrix XRS
  • 2003-2006 Pontiac Vibe GT
  • 2005-2006 Toyota Corolla XRS

Important Notes on Parts

  • Ensure to use grade bolts for installation; regular bolts may break under stress.
  • The backing plate for disc brakes is thicker than that for drums, so longer bolts (M10x1.25) are necessary; stock bolts are typically 30mm long while longer ones should be around 40mm.

Installation Steps

1. Preparation: Gather all necessary tools and parts. Ensure you have a clean workspace.

2. Remove Old Components:

- Lift the vehicle and remove the rear wheels.

- Detach the drum brakes by removing the drum and associated hardware.

3. Install New Backing Plates:

- Position the new backing plates over the axle assembly.

- Use longer bolts to secure them in place.

4. Mount Calipers and Rotors:

- Attach the calipers using the provided hardware.

- Install the rotors over the new backing plates.

5. Connect Brake Lines:

- Ensure that brake lines are properly connected to avoid leaks.

- Consider replacing or adjusting the proportioning valve if necessary to balance braking force between front and rear.

6. Install Parking Brake Cables:

- Use parking brake cables from a Corolla XRS for optimal fitment.

7. Final Checks:

- Inspect all connections and ensure everything is secure.

- Bleed the brake system to remove air from the lines.

8. Test Drive:

- Carefully test drive the vehicle to ensure proper brake function before regular use.

FAQs About Rear Disc Brake Conversion

FAQs About 9th Gen Corolla Rear Disc Conversion

    • Is it worth converting to rear disc brakes?
      Yes, many users report improved braking performance and aesthetics.

    • Do I need to change the master cylinder?
      No, most users retain their original master cylinder without issues.

    • How long does the conversion take?
      Installation can take anywhere from 4 hours to a full weekend depending on skill level.

Converting your 9th Gen Corolla from drum to disc brakes can significantly enhance your vehicle's performance and safety. With careful planning and execution, this modification can be a rewarding project that improves both driving experience and vehicle reliability.