How to bleed and how to change brakes?


The most common questions about brakes on the car

In the case of brake systems in passenger cars, a distinction is made between the service brake system, the auxiliary brake system and the parking brake system. The parking brake system is the handbrake and the service brake system the “normal” brake, which serves to slow down the car while driving. The disc brake (for motorcycles, cars, racing cars) and the drum brake (for mopeds or as a rear wheel brake for low-performance cars or commercial vehicles such as trailers and tractors) are common.
The brake discs are surrounded by brake linings, which during the braking process convert the movement energy into heat energy and thus reduce the speed.

Who is allowed repair or replace brakes?

Everyone is allowed to change their brakes by themselves. However, the risk is borne by the driver himself. In the event of an accident, insurance does not apply. Worse, if you do not have any specialist knowledge and damage someone in an accident, it can also be quite expensive in the area of ​​civil law. So rather only to the brakes ran, if one also suspects, or a professional nachguck leave.

When should I change the brakes?

The brake pads, also known as brake pads, must be changed frequently during an auto-life. So it is said that you should be exchanged for less than 3 mm of resting. The wear and tear depends strongly on the driving style, so if the brake is often applied to the brake, the pads have to change after 10,000 to 15,000 km. A forward-looking approach can lead to the brake linings being able to hold 100,000 km. In many cars, wear indicators are nowadays found. Either they work electrically and a light is on the dashboard if the brake pad is too worn out or mechanically with a metal pin in the brake pad scratching the disc when it is time for a change. The screaming sound is unpleasant and the last call to change the brake pads.
If wear is too high, the brake discs should be replaced. This can be seen when the discs are wedge-shaped worn or too thin. Manufacturers specify minimum thicknesses that must be adhered to. Otherwise the discs might break. If this happens, the pistons could be misunderstood with the brake caliper and braking would be impossible. In this case, it is advisable to change the brake discs in pairs, otherwise braking performance on both sides would be different. A sign of irregularly worn brake discs is a flutter of the steering wheel during the braking process.
In the case of drum brakes, the brake shoes are carriers of the friction material. They must be replaced every few years in normal driving conditions. However, it is also recommended to replace the wheel cylinders and adjusters. In the case of the spare parts on eBay you will find brake complete sets which, in addition to the new brake shoes, also contain wheel cylinders, springs, adjusters and necessary fastening parts.

Buy cheap brake discs online. Here you can also get brake pads, brake hoses, cars brake component packages and brake drums.

Here is a video tutorial, how to change your brakes, pads and rotors. I hope it will help you.

Why does my brakes squeal?

The brakes can only achieve full performance if the wheels are easy to move. This is ensured with a brake lubricant. The brakes are also protected against corrosion and a squeal is prevented. Care must be taken to ensure that they do not contain copper. This can lead to brake stiffness, corrosion and noise during braking.
High-quality lubricants are electrically neutral, have very low oil separation, are not prone to peeling, are resistant to leaks and insensitive to cold and heat.

How do I bleed the brakes? When must the brake fluid be changed?

In principle you should change the brake fluid every 2 years, otherwise a total failure of the brakes can occur. In the course of time, the brake fluid attracts moisture from the air, which is heated and the dreaded steam bubbles are generated.
The fact that air is in the brake system can be recognized by a longer pedal effect of the brake and the associated declining braking effect. The brake pad feels “spongy” and can easily be pushed to the floor plate without the usual braking effect.

Release the brakes properly

  1. When changing the brake fluid, it is mainly cleanliness. No lint may enter the braking system. If, therefore, brake hoses or the cover are unscrewed from the main brake cylinder, they should be closed again as quickly as possible.
  2. Start with the wheel which is farthest from the main brake cylinder.
  3. Remove the cover of the main brake cylinder.
  4. The old brake fluid can now be removed using a roasting pan. Remove as much as possible.
  5. Rinse the container thoroughly with a lint-free cloth. Caution, brake fluid damages paint!
  6. Pour new brake fluid into the main brake cylinder. Replace cover.
  7. Now you should pass the brake pedal several times (15 times or more).
  8. Now you can release the bleed valves.
  9. Take a transparent rubber hose and place it on the vent screw. The other end you put into a container with 3-5 cm brake fluid. This ensures that the air is no longer sucked back.
  10. Place a wood or a spacer under the brake pad so that it can not be pushed through completely.
  11. Fill fresh brake fluid into the main brake cylinder and replace the cover.
  12. Now you need a second person: This presses the brake pedal slowly with even strength and holds it pressed.
  13. Now start right with the wheel and turn the bleed screw a quarter turn to the left. The old liquid now flows into the container. When this stops running, close the valve. The brake pedal now sags easily, which is normal.
  14. Now your helper can take the foot from the brake pedal.
  15. This process must be repeated until new, transparent liquid comes out of the hose. Make sure that the liquid in your container is not too small, as air is sucked into the main brake cylinder.
  16. Now tighten the bleed screw again and repeat all steps with the remaining wheels.

You can also buy complete brake bleeder tool online.

What is Brake Cleaner?

Brake Cleaner is also called a Parts Cleaner and is a colorless detergent for brakes, underbody and engine compartment. It evaporates after use without residue. Attention, it is highly flammable and environmentally hazardous. Also, it can decompose rubber.
Order brake cleaner online.

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