Brake Fluid Flush 101: How, When, & Why!

Introduction

In this tutorial, we'll guide you through the process of flushing brake fluid, an essential maintenance task to ensure your vehicle’s braking system operates effectively. Regular brake fluid flushes help maintain brake performance and prevent moisture buildup, which can lead to corrosion and reduced braking efficiency.

Step 1: Gather Necessary Tools and Materials

Before starting the brake fluid flush, ensure you have the following tools and materials:

• Brake fluid tester
• Brake fluid bleeder tool
• Fluid evacuator
• New brake fluid (consult your vehicle's manual for the correct type)
• Clean cloths for spills

Tips

• Always use the recommended brake fluid type for your vehicle to avoid damage.
• Have a friend assist you if possible, especially when pressing the brake pedal.

Step 2: Prepare the Vehicle

1. Safety First

   • Park the vehicle on a flat surface and engage the parking brake.
   • Wear gloves and safety goggles to protect yourself from brake fluid, which can be corrosive.

2. Access the Brake Fluid Reservoir

   • Open the hood and locate the brake fluid reservoir. It is usually near the back of the engine bay.

3. Remove Old Brake Fluid

   • Use the fluid evacuator to remove as much old brake fluid from the reservoir as possible.
   • Dispose of old fluid properly according to local regulations.

Step 3: Add New Brake Fluid

1. Fill the Reservoir

   • Pour new brake fluid into the reservoir until it reaches the "full" line.
   • Be careful not to overfill.

2. Seal the Reservoir

   • Replace the reservoir cap securely to prevent contamination.

Step 4: Bleed the Brakes

1. Locate Brake Bleeder Valves

   • Identify the bleeder valves on each brake caliper. They are often covered by a rubber cap.

2. Attach the Brake Bleeder Tool

   • Place the brake bleeder tool over the bleeder valve to catch the old fluid.

3. Bleed Each Brake

   • Start with the brake furthest from the master cylinder (usually the passenger rear) and work towards the closest (driver front).
   • Have an assistant press the brake pedal while you open the bleeder valve.
   • Close the valve before your assistant releases the pedal.
   • Repeat this process until you see clear, new brake fluid without bubbles in the tool.

Common Pitfalls to Avoid

• Do not let the brake fluid reservoir run dry during the process, as it can introduce air into the system.
• Ensure you are using the right tools to avoid stripping the bleeder valve.

Step 5: Final Checks

1. Inspect Brake Fluid Levels

   • After bleeding all brakes, check the fluid level in the reservoir and top off if necessary.

2. Test the Brakes

   • Start the vehicle and gently press the brake pedal to ensure proper braking response.

3. Clean Up

   • Clean any spilled brake fluid immediately, as it can damage paint and other surfaces.

Conclusion

Flushing your brake fluid is a straightforward yet crucial maintenance task that can significantly enhance your vehicle's braking performance. By following these steps, you can ensure your brake system is in top condition. Regular maintenance will not only improve safety but also prolong the life of your braking components. Remember to check your vehicle’s manual for specific recommendations and intervals for brake fluid maintenance.