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How To Get Air Out Of Brake Lines Without Bleeding ?

Looking for “How to Get Air out of Brake Lines without Bleeding”? The brake system is an important safety feature of any car. It’s crucial to keep the brake lines free of air bubbles, which can affect braking performance.

Are you a do-it-yourselfer? Need to know the steps to get the air out of your brake lines without having to bleed them? Keep reading. We’ll show you how.

If you’ve ever had to change your brake pads, you know that getting the air out of the brake lines is a crucial step. But what do you do if you don’t have access to a brake bleeding tool? Follow the simple steps given below and you’ll be back on the road in no time! In addition, we’ll guide you on how to get the air out of your brake lines without bleeding them.

What Is Air In Brake Lines?

As we all know, hydraulic brake systems use fluid pressure to transfer the force from your foot on the pedal to the wheels of your car. If any air gets into this fluid stream, it causes problems because the high-pressure sections can’t compress as much as they need for safe braking.

Air in the brake lines is a common problem that can cause your braking system to fail. When air gets inside, it can make the brakes feel spongy and less responsive. This can be dangerous if you are trying to stop suddenly. The good news is that there are simple ways to get rid of this air without having to go through a full bleeding process.

What is Brake Bleeding?

Brake bleeding is a professional procedure used to get air out of the brake system. Mechanics use a special tool called a brake bleeder to do this. The air bubbles need to be removed because they change the pressure in the system. Clean brake fluid is forced into the system and pushes the air bubbles out.


Things You Will Need When Get Air Out Of Brake Lines Without Bleeding 

The following tools will come in handy when you get air out of your brake lines without bleeding them.

  • Standard screwdriver
  •  Pliers
  • Needle nose pliers
  • Hydraulic jack or car lift for safety reasons
  • A helper
  • Paper towels or rags
  • Proper car service tools
  • Locking pliers for bleed screws
  • A container to catch brake fluid.  Never use a metal container as it will conduct electricity, which can be extremely dangerous when working around your vehicle’s braking system! You should use either plastic or rubber containers.

Also read : How Many Axles Does A Car Have ?

Two Main Steps On How To Get The Air Out Of Brake Lines Without Bleeding

There are two steps involved in getting air out of brake lines without bleeding them. First, you’ll need to get the air bubbles out of the master cylinder and then out of each wheel cylinder, one by one.

Step 1: Get air bubbles out of master cylinder. 

The first step is very simple – just loosen up all 3 plugs on top of master cylinder until they are free. Then tighten them back up again. Do not remove the plugs completely out of the master cylinder because if you do so, brake fluid will leak out making it difficult to tighten them back up at their original position.

Step 2: Get air bubbles out of wheel cylinders. 

For this step, first ensure that your car is parked on a level surface with the handbrake applied securely, jack placed safely under the vehicle, and parking brake set too. Now release tension from the hydraulic jack supporting the vehicle that allows it to rest on its wheels instead of all four jacks/plates equally distributed under each corner of the vehicle body).

Once done, follow these steps to get air bubbles out of each wheel cylinder one by:

1) Identify which wheel has the master cylinder and which wheels have wheel cylinders.

2) Loosen up the bleed screw on each non-master cylinder one by one using a small flat screwdriver.

3) Keeping your container ready underneath, place a clean rag over the bleed screw so as to catch any fluid that comes out of it as brake fluid will damage paintwork if spilled onto vehicle surfaces.

4) Then ask someone else to press down firmly on the brake pedal while you watch for bubbles coming through from bleed screws.

5) When you see no more bubbles coming from bleed screws, tighten them back up again securely and ensure that they are seated properly in their original position/threads before moving on to the other wheel(s). Repeat this process with all remaining non-master cylinders.

So, you’ve tried all the tricks in the book to get the air out of your brake lines without bleeding them. Unfortunately, it doesn’t work and they’re still full of air bubbles. What now?

Well, you can either go out and purchase a bleed kit (which is relatively inexpensive) or take your vehicle to a local mechanic.

Of course, there’s always another way – learning how to do it yourself! With just a little bit of elbow grease and about an hour of time, you’ll be done before you know it.

How To Get Air Out Of Brake Lines Without Bleeding

12 steps

1. Park your car on a flat surface and apply the parking brake. Engage the emergency/parking brake so that you don’t roll down the hill while working on the problem.

2. Open up your vehicle’s hood and locate the master cylinder reservoir cap. It will be round or octagonal, with an arrow pointing to which wheel should be pumped first (the right front wheel).

3. Remove the reservoir cap by turning it counterclockwise until it comes off completely.

4. Clean the cap and place it back on the reservoir. Make sure the arrow is pointing at which wheel should be pumped first.

5. Repeat Step 3 for all other wheels, so that each reservoir has its own cap with an arrow pointing to it. If your car’s brake fluid levels are low, replace them completely to avoid future problems with air bubbles. You can then fill up each reservoir as much as possible (without getting any air into the system).

6. Now that you’ve closed off each reservoir from the rest of the vehicle, slowly step on each brake pedal 20 times until it becomes firm again (or until no more air comes out). This will push all excess air towards one end or another and make bleeding easier later on. It may help to place a clean, dry washcloth under each brake pedal.

7. Once you’ve finished with step 6, remove the reservoir cap from one of the master cylinders and slowly pour in fresh brake fluid until it reaches just below the brim of the tank. Ensure that no air bubbles are present in the liquid by tilting the container slightly so that they can rise to the top. Air bubbles are easily visible against clear-colored brake fluid.

8. Repeat Step 7 for all other master cylinders, if necessary (if your car has four or six wheels). You should always refill after bleeding each wheel because it will allow you to check that there is no more air between fills and will also reduce your chances of running out of brake fluid.

9. Once you’ve finished adding fresh brake fluid to the reservoirs and bleeding all of the wheels, replace the reservoir caps and remove all tools from under your car.

10. Start your car’s engine and press on each brake pedal 20 times to push any excess air out of the system (it will take less effort than before because there is no more air in the lines). If your car doesn’t have an automatic transmission, place it in neutral so that you can rev up your engine a bit without driving anywhere.

11. Repeat Step 10 until each brake pedal feels firm again and then stop the engine. Your vehicle should now stop as well as it used to when its brakes were working properly! You may find it helpful to cycle your car’s ignition a couple of times to let the computer know that you’ve closed all windows and that its brake fluid levels are full.

12. Test how your brakes work by driving around the block (please note, however, that this does not replace a proper test performed at a mechanic’s shop with calibrated equipment). If everything is okay, you’re good to go!

The Causes of Air Bubbles brake lines:

  • A very porous brake line that is lightly touching another part of the brake system can create bubbles. As you drive, pressure from your foot on the pedal squeezes the fluid and air together in such a way that even small amounts of trapped air create “bubbles” in your brakes’ hydraulic systems.
  • When you pump your brakes, it shakes all of the lines around and forces some air to travel through the transport tubes inside each wheel’s brake line. If any vehicle parts are touching one another or if there is a significant amount of water inside a hose, air pockets will form inside them when they’re moved around by your car’s motions during this process.
  • In most cars, refilling with fresh brake fluid at least once after every two brake jobs is necessary in order to maintain their performance. Some brake fluids will absorb water over time, especially if they are used regularly in cold weather, which can create air bubbles when the car sits for a long period of time or when it is refilled with fresh fluid.
  • Air bubbles may also be created if your mechanic doesn’t bleed all of the old fluid out of your system during a brake job (this may happen if you only got new brake pads instead of new rotors). You should always ask how your mechanic plans on draining excess liquid out of your brakes before work begins!

The Solutions:

  • You can avoid creating air pockets by not removing the reservoir cap from any master cylinder until you have finished bleeding all of the brakes on your car.
  • Inspecting your brake lines for loose connections or other damage can help you to quickly find any potential problems with your car’s hydraulic system. It may be a good idea to hire a mechanic to take a look at your car if you see any rust, cracks, bumps, hisses, moist areas, dry spots or bubbles inside of them on the road or by your home.
  • The most rudimentary way of diagnosing air bubbles is to release all pressure on the brakes by taking your foot off of the pedal and then slowly pumping it until your vehicle stops. If there are no air pockets present inside of the lines, this should fix the problem entirely. You can repeat this process as many times as necessary in order to achieve the desired results.
  • An air bubble in your brake lines can be blown out by slowly pushing your brakes until the bubbles disappear altogether. If you rev up your engine without pressing on the pedal, you should also be able to get rid of all air pockets just by using the momentum created by the vehicle’s motions after it starts moving forward.

Tips On How To Get Air Out Of Brake Lines Done Properly When Bleeding Your Own Brakes :


  • Before you begin, make sure that your car is parked on a flat surface and that all of the tires are perpendicular to the ground.
  • After you’ve located and opened the master cylinder in order to access the brake fluid inside it, clean off any dirt or rust inside of its lid in addition to wiping down both sides of each rubber stopper in order to prevent them from getting stuck in place (you may need to coat these with petroleum jelly for this purpose). If there isn’t enough liquid inside of your master cylinder when you remove its cap, add only DOT 3 or DOT 4 brake fluid until it’s filled up to about one inch below where the upper edge ends.
  • You should wear safety goggles when performing this procedure. You should also cover your ears with sound-proof headphones to avoid the unpleasant noise that the fluid will make if it’s forced through damaged brake lines (if you can’t find any, try wearing two layers of fabric over your head instead).
  • Before you remove the cap from each brake line, have a friend sit in their car and pump their brakes 12 times so that air bubbles are created inside of them. This is an important step that should not be skipped under any circumstances! Keep in mind that there may or may not be air bubbles inside of larger transport tubes after this process has been completed. It is much more likely for this to happen if you have just replaced old brake pads on your car before this project begins, though.
  • You should always keep a clean rag or old towel on you while your work to wipe off any excess fluid that seeps away from each of the rubber stoppers inside of your master cylinder. If this happens, never attempt to get it back into the container by pouring it down any other brake lines (it’s possible to accidentally introduce air into them instead).
  • Once all of your car’s brakes have been bled and you’ve inspected each rubber stopper in order to make sure that there isn’t anything wrong with them, clean off and replace the cap on top of your master cylinder and put all tools and materials away properly before moving forward.

If these steps aren’t taken when working with braking systems, air bubbles can still manage to slip through undetected and cause additional problems later on down the road. If you’ve just replaced brake lines or installed new brake shoes, drums or rotors on your car, it’s usually a good idea to bleed your system anyway. Before beginning anything else related to this project, make sure that all of the old hardware has been removed from your vehicle first (this includes any rubber insulation or metal parts that were left behind even if they don’t look like they’re causing any damage).

  • A general rule of thumb is that you should always replace all soft copper lines with braided steel ones on each axle of your car every time you need to do work associated with its braking system . If there happens to be an issue with one side of your car, it’s generally a good idea to bleed your brakes and retest them before driving it too far in most instances.
  • If you’re unsure about how to go about doing any of these tasks yourself, consult with an ASE certified mechanic or brake specialist instead. You can also use the Search feature at the top of this page to find more information on the topic you’re interested in. Even if you only have access to a pair of adjustable wrenches and a flathead screwdriver, there are simple things that almost anyone should be able learn from watching videos posted on YouTube .

There’s only one real way to get air out of brake lines when bleeding brakes on your car: don’t stop until all of the air pockets inside of them have been removed. This is usually indicated by a change in the fluid’s color and/or consistency; when bleeding brakes on most cars, you should always start with the front ones before moving to the back ones.

Once you’ve completed this project, all of your brake lines should be completely filled up to their correct levels once again and you’ll never have to worry about any air bubbles being trapped inside of them ever again. If that isn’t what ends up happening after completing this project, then there is a good chance that one of your rubber stoppers has a hole or crack in it somewhere.

Advantages of getting air out of brake lines:

  • This project makes it a lot easier to bleed brakes when necessary.
  • It allows brake fluid to reach all of your car’s brake lines and calipers very easily.

Disadvantages of adding air into brake lines:

  • Brake fluid that has been thinned out is harder for your vehicle’s ABS system to sense properly.
  • Air in the braking system can cause additional problems over time, especially if not addressed immediately after it happens!


What causes air bubbles?

Air bubbles happen when too much air gets stuck in brake lines. This can be caused by electrical problems or not doing the brakes correctly. They usually happen at bad times.

Is there anything else that might cause additional problems?

Yes! Additional problems can arise if rust or debris enters the master cylinder when working on your car’s brakes. These issues can be avoided by ensuring everything is completely disconnected before working on the braking system.

How do you fix air pockets?

To fix air pockets, bleed your brakes. First, push the brake pedal down slowly. Then, open both bleeder valves on your vehicle. Allow the excess air to release slowly from the entire system. You can also add or replace brake fluid while bleeding to remove air bubbles over time.

How long does it take to get air out of brake lines? 

It usually takes about 5 minutes or less to get the air out of brake lines, depending on your car.

What are brake fluid levels? 

Brake fluid is hygroscopic, which means that it absorbs water from its surroundings. When the moisture level in the brake fluid rises above a certain threshold, it can interfere with braking performance. That’s why you need to check your vehicle’s brake fluid levels regularly and top them up when necessary.

Is it dangerous to drive with air in the brake lines? 

Driving with air in the brake lines can cause reduced braking performance, which may result in longer stopping distances. This could pose serious risks if you have to stop suddenly while driving, so don’t take any chances.

How do I know if I have air in my brake lines? 

If you notice that your car’s braking performance has degraded, chances are you’ve got air bubbles in the brake lines.

What are symptoms that indicate air in the brake lines? 

If your brake pedal feels squishy or spongy, there’s air in the lines. The more air you have in the lines, the longer it will take for your car to stop.


An independent brake system is a complex safety feature that ensures your car’s braking performance. If its components aren’t working properly, you’re taking a big risk every time you get behind the wheel of your vehicle. The above guide illustrates how to check and bleed your car’s brakes at home in order to reduce this risk.

By learning these tips and tricks, you will be able to get the brake system to work properly and safely. Make sure you follow those given steps in order to have the best results.

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