How to Bleed Brakes in Standard American English
Bleeding brakes is a relatively simple maintenance task that can be done at home with a few basic tools. However, it’s important to follow the steps carefully to avoid any mistakes that could compromise your braking system.
Step 1: Gather Your Tools
You will need the following tools:
- Brake fluid
- Brake bleeder wrench
- Clear plastic tubing
- Clean rags
- Funnel
Step 2: Safety First
Before you begin, park your car on a flat surface and engage the parking brake. Allow the engine to cool down for at least 30 minutes to avoid burns. Wear safety glasses and gloves to protect yourself from brake fluid, which is corrosive.
Step 3: Locate the Brake Bleeder Screws
The brake bleeder screws are typically located on the brake calipers or wheel cylinders. They are small, usually hexagonal-shaped screws that are covered with rubber caps.
Step 4: Fill the Master Cylinder
Open the hood and locate the brake master cylinder. Remove the cap and use a funnel to fill it with fresh brake fluid. The correct type of brake fluid for your vehicle can be found in your owner’s manual.
Step 5: Connect the Clear Plastic Tubing
Attach one end of the clear plastic tubing to the brake bleeder screw and the other end to a clean container. The container should be large enough to hold at least 8 ounces of brake fluid.
Step 6: Open the Bleeder Screw
Use the brake bleeder wrench to turn the bleeder screw counterclockwise by about 1/4 turn. This will allow brake fluid to flow out of the caliper or wheel cylinder and through the tubing into the container.
Step 7: Pump the Brake Pedal
Have an assistant slowly pump the brake pedal several times. As they pump, watch the tubing for bubbles. Once the bubbles disappear, close the bleeder screw by turning it clockwise until it’s snug.
Step 8: Repeat Steps 4-7
Repeat steps 4-7 for each of the other brake calipers or wheel cylinders. Start with the caliper or wheel cylinder that is farthest from the master cylinder and work your way towards the master cylinder.
Step 9: Check the Brake Fluid Level
After bleeding all of the brakes, check the brake fluid level in the master cylinder again. If it’s low, top it off with fresh brake fluid.
Step 10: Test the Brakes
Start your car and allow it to run for a few minutes to build up pressure in the brake system. Then, gently apply the brakes to make sure they are working properly. If the pedal feels spongy or goes all the way to the floor, you may need to repeat the bleeding process.
FAQs
Q: How often should I bleed my brakes?
A: Most experts recommend bleeding your brakes every 2-3 years or 30,000-45,000 miles. However, you may need to bleed your brakes more often if you notice any of the following symptoms:
- Spongy brake pedal
- Brake pedal goes all the way to the floor
- Vehicle pulls to one side when braking
- Leaking brake fluid
Q: Can I bleed my brakes myself?
A: Yes, bleeding your brakes is a relatively simple task that can be done at home with a few basic tools. However, it’s important to follow the steps carefully to avoid any mistakes that could compromise your braking system.
Q: What type of brake fluid should I use?
A: The correct type of brake fluid for your vehicle can be found in your owner’s manual. Most vehicles use DOT 3 or DOT 4 brake fluid.
Q: Can I use old brake fluid?
A: No, you should never use old brake fluid. Brake fluid absorbs moisture over time, which can reduce its effectiveness. Using old brake fluid can lead to brake failure.
Q: What are the signs of air in the brake lines?
A: The signs of air in the brake lines include:
- Spongy brake pedal
- Brake pedal goes all the way to the floor
- Vehicle pulls to one side when braking
- Hissing or gurgling sound when applying the brakes
Q: Can I drive with air in the brake lines?
A: No, you should never drive with air in the brake lines. Air in the brake lines can cause brake failure.
Q: What should I do if I get brake fluid on my skin?
A: Brake fluid is corrosive and can cause skin irritation. If you get brake fluid on your skin, wash it off immediately with soap and water.
Q: What should I do if I get brake fluid in my eyes?
A: Brake fluid can cause eye irritation. If you get brake fluid in your eyes, flush them immediately with clean water for at least 15 minutes. Seek medical attention if the irritation persists.
