This guide will walk you through the step-by-step process of pressure brake bleeding, including the tools you’ll need and common problems you might encounter.
Understanding Pressure Brake Bleeding
Air in your brake system can make it harder to stop your car.
This can be dangerous, especially in emergencies.
That’s why it’s important to bleed your brakes regularly to remove any air.
How Does A Pressure Bleeder Work?
A pressure bleeder is a special tool that helps remove air from your brakes.
It works by putting pressure on the brake fluid, forcing the air bubbles out.
This is different from the old-fashioned way of bleeding brakes, which involves pumping the brake pedal.
Advantages Of Pressure Bleeders
- Faster: Pressure bleeders are usually faster than manual bleeding.
- Easier: You don’t have to pump the brake pedal, which can be tiring.
- Safer: Pressure bleeders can help prevent air from getting back into the system.
Tools Needed For Pressure Brake Bleeding Method
Essential Tools:
- Pressure Bleeder
- Brake Fluid
- Wrench Set
- Bleed Screw Wrench.
Optional Tools:
- Brake Fluid Reservoir
- Funnel
- Gloves
- Safety Glasses
There are many different brands of pressure bleeders and other tools available.
It’s a good idea to do some research and read reviews to find the best tools for your needs.
Some popular brands include Motive, EZ Bleed, and Craftsman.
After using your tools, clean them and store them in a dry place. This will help them last longer.
Step-by-Step Guide To Pressure Brake Bleeding
Step 1. Preparation:
- Park on a Level Surface: Make sure your car is parked on a flat surface.
- Gather Your Tools: Collect all the tools you need, including your pressure bleeder, brake fluid, wrenches, and bleed screw wrench.
- Open the Bleeder Valves: Locate the bleed screws on your calipers and loosen them slightly using the bleed screw wrench.
Step 2. Connecting The Pressure Bleeder:
- Attach the Hose: Connect the pressure bleeder hose to the bleeder screw on the farthest wheel from the master cylinder (usually the rear driver’s side).
- Fill the Reservoir: Fill the pressure bleeder reservoir with the correct type of brake fluid.
- Set the Pressure: Set the pressure on the bleeder to the recommended level (usually around 15-20 psi).
Step 3. Bleeding The Brakes:
- Have a Helper: Ask someone to pump the brake pedal while you watch the brake fluid flow.
- Open the Bleeder Valve: Open the bleeder valve on the first wheel.
- Pump the Pedal: Have your helper pump the brake pedal slowly and steadily.
- Watch the Fluid: Watch for brake fluid to flow out of the bleeder valve. If it’s a dark color or contains air bubbles, continue pumping.
- Close the Valve: Once the fluid is clear and free of air bubbles, close the bleeder valve.
- Repeat for Other Wheels: Follow the same process for the remaining wheels, starting with the farthest wheel from the master cylinder and working your way closer.
Step 4. Checking For Air Bubbles:
- Check the Brake Fluid Level: Make sure the brake fluid level in the master cylinder is full.
- Test the Brakes: Pump the brake pedal a few times and check if it feels firm. If it feels spongy, there may still be air in the system.
- Repeat Bleeding: If necessary, repeat the bleeding process until the brake pedal feels firm.
Step 5. Testing The Brakes:
- Take a Test Drive: Drive your car a short distance and test the brakes to ensure they are working properly. The brake pedal should feel firm and the car should stop smoothly.
Common Problems That May Arise During Pressure Brake Bleeding
Air Bubbles:
Even after multiple rounds of bleeding, air bubbles may persist in the brake system.
To address this, check for leaks, ensure the pressure bleeder is connected correctly, and try bleeding the brakes again.
If the problem continues, consult a mechanic.
Leaky Connections:
If the brake fluid is leaking from the pressure bleeder connection or brake lines, tighten loose connections, replace damaged gaskets or seals, or seek professional assistance.
Seized Bleed Screws:
If you’re unable to loosen seized bleed screws, try using a penetrating lubricant and a longer wrench.
If the problem persists, consult a mechanic to avoid damaging the bleed screw.
Low Brake Fluid Level:
A low brake fluid level in the master cylinder can be addressed by refilling it with the correct type of brake fluid.
However, if the fluid level continues to drop, there may be a leak in the system.
Ineffective Bleeding:
If the brake pedal still feels spongy after bleeding, double-check the procedure, ensure all connections are tight, and check for any signs of air in the system.
If the problem persists, consult a mechanic for further assistance.
Below are other methods you can use to bleed your brake: