Adam's Cool New Auto Blog
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Adam's Cool New Auto Blog

Yo! My name is Adam and this is my cool new auto blog. I live with my parents in the suburbs of Sydney. It might not seem pretty cool living with your parents, but I am planning to move out soon. One massive advantage of living with my parents is that I can save a lot of money to invest in my new car. As well as the extra money in my pocket, I also benefit from lots of advice from my dad who is an auto mechanic. He has helped me to fine-tune and to add accessorises to my auto so it looks really ace.

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How to Deal with Excess Air in Your Braking System

Sherri Craig

Do you have a "love-hate" relationship with your car at the moment? Do you feel as if something is wrong, but you can't put your finger on it? When you put your foot on the brake pedal, there seems to be a lot more movement than there was in the past and you may not be happy driving it right now. What could be going on and what can you do in order to put your mind at rest?

Excess Air

This type of phenomenon usually means that air has infiltrated your car's braking system. You will need to bleed this out and there are specific areas to access in order for you to get this underway.

Getting Ready

You will need to jack up the car and place axle stands underneath for safety, before removing the wheels. Have a look behind the brake disc, where you will find a large screw on the back of the metal caliper. Make sure that you use a spanner of the correct size and turn this without damaging it.

Next, open the bonnet and have a look at the brake master cylinder. If the level is low, add some fluid to it and then leave the cap off the cylinder.

How to Bleed

You will need a friend to help you by sitting in the car and pressing the brake pedal upon your instruction. Get some clear tubing and apply one end to the back of the screw that you just loosened and the other should be placed into an empty container. Elevate this container so that it is above the bleed screw and then tell your friend to push the brake pedal down slowly.

You will see fluid and bubbles of air pass out from the screw, through the pipe to the container. Your helper should depress the pedal several times and then hold it in the "down" position, while you tighten the screw back up.

You will now need to repeat this process for all of the other three wheels, so that you fully bleed air from the entire system. However, in between each wheel always make a trip back to the master cylinder and ensure that there is enough fluid within. You will know that the process is finished, when you cannot see any more air bubbles.

Your Next Step

This process should provide you with a firm brake pedal once again, but you should nevertheless ensure that you check your vehicle in for a service as soon as possible. In this way, a mechanic can have a look at all the brake pipes and other components, to ensure that nothing needs to be changed.


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