Gravity brake bleeding is a method of removing air bubbles from your car’s brake system.
It’s a do-it-yourself (DIY) task you can do at home with the right tools and patience.
The process involves using gravity to force brake fluid through the system and out of the bleeder valves, which helps to remove any air pockets that can interfere with your brakes’ performance.
With that said, In this guide, you’ll learn how to bleed the brake using the gravity bleeding method, Including the tools you will need.
Plus, we’ll quickly compare the gravity brake bleeding method, vacuum brake bleeding method, and pressure brake bleeding method.
Tools Needed For Gravity Brake Bleeding
Here’s a list of tools you’ll need to get started with gravity brake bleeding:
- Brake Fluid: Make sure to use the correct type of brake fluid for your vehicle. Check your owner’s manual for the recommended type.
- Ratchet and Socket Set: This set is used to loosen and tighten bolts.
- Screwdriver: You’ll need a screwdriver to remove plastic covers or clips.
- Brake Bleeder Wrench: This specialized tool is used to open and close the bleeder valves on your brakes.
- Container: You’ll need a container to catch the old brake fluid.
- Funnel: A funnel helps you pour the new brake fluid into the reservoir without spilling.
- Gloves: Brake fluid can irritate your skin, so it’s important to wear gloves while working.
While not strictly necessary, these additional tools can make the job easier:
- Jack and Jack Stands: If you need to raise your car to access the bleeder valves, you’ll need a jack and jack stand.
- Wheel Chocks: Place wheel chocks under the opposite wheels to prevent the car from rolling while you’re working.
- Torque Wrench: A torque wrench can help you tighten the bleeder valves to the correct specifications.
You can find most of these tools at your local auto parts store or online.
Some tools, like the brake bleeder wrench, might be more specialized and could be found at automotive tool stores.
How To Bleed Brakes Using The Gravity Method?
Here is a step-by-step guide to bleed your brake using the gravity method:
1. Prepare The Vehicle:
Park your car on a level surface, and engage the parking brake.
Open the hood and locate the brake fluid reservoir.
2. Gather Your Tools:
Ensure you have the necessary tools, including brake fluid, a ratchet and socket set, a screwdriver, a brake bleeder wrench, a container to catch the old fluid, and a funnel.
3. Locate The Bleeder Valves:
The bleeder valves are usually found near the top of the brake calipers.
They are typically small, round metal valves.
4. Open The Bleeder Valves:
Use the brake bleeder wrench to carefully open one bleeder valve at a time.
5. Have Someone Pump The Brakes:
Ask someone to slowly pump the brake pedal while you watch the brake fluid flow out of the bleeder valve.
6. Watch For Air Bubbles:
Keep an eye out for air bubbles in the brake fluid.
Once the fluid flows out steadily without any bubbles, you can close the bleeder valve.
7. Close The Bleeder Valve:
Tighten the bleeder valve securely using the brake bleeder wrench.
8. Repeat For Other Wheels:
Repeat steps 4-7 for the remaining wheels.
9. Check The Fluid Level:
After bleeding all the brakes, check the brake fluid reservoir and refill it to the correct level.
10. Test The Brakes:
Take your car for a test drive to ensure the brakes are working properly.
If you notice any unusual behavior, such as spongy brakes or pulling to one side, consult a mechanic.
Gravity Brake Bleeding Vs. Vacuum Bleeding And Pressure Bleeding
Gravity Bleeding
Gravity bleeding is the simplest and most affordable method.
It involves using gravity to force brake fluid through the system and out of the bleeder valves.
Pros Of Gravity Bleeding:
- Simple and easy to do
- Doesn’t require any special tools
- Affordable
Cons Of Gravity Bleeding:
- Can be time-consuming
- May not be effective for removing all air bubbles from the system
Vacuum Bleeding
Vacuum bleeding uses a vacuum pump to draw fluid through the system and out of the bleeder valves.
This method is faster and more effective than gravity bleeding.
Pros Of Vacuum Bleeding:
- Faster and more efficient than gravity bleeding
- Can remove all air bubbles from the system
- Requires less physical effort
Cons Of Vacuum Bleeding:
- Requires a vacuum pump
- Can be more expensive than gravity bleeding
Pressure Bleeding
Pressure bleeding uses a pressure bleeder to force fluid through the system and out of the bleeder valves.
This method is the fastest and most effective, but it also requires the most specialized equipment.
Pros Of Pressure Bleeding:
- The fastest and most effective method
- Can bleed multiple wheels at once
- Requires less physical effort
Cons Of Pressure Bleeding:
- Requires a pressure bleeder
- Can be expensive
- May require some training to use it properly
However, the best brake bleeding method for you will depend on your budget, time constraints, and level of mechanical expertise.
If you’re on a tight budget and don’t mind spending some time, gravity bleeding may be a good option.
And, If you want a faster and more efficient method, vacuum bleeding or pressure bleeding may be better suited to your needs.