Brake discs come in pairs

Change the brake discs yourself - that's how it works

The brakes on a motor vehicle are essential for safety. To ensure safety at all times, it is necessary to check the brakes regularly and replace them if necessary. In older vehicles, drivers who have some specialist knowledge and are skilled at hand can change both brake pads and brake discs themselves. This can easily save a few hundred euros. With the following instructions and tips, replacement should no longer be a problem. Everything is explained step by step.

Basics

A reliably functioning braking system is required so that rapid and precise braking is possible in any traffic situation, no matter how tricky. That is why brakes need maintenance and care. Anyone who swaps the brake pads and brake discs should have a little specialist knowledge. If you replace the brake discs yourself, just to save money, it can backfire. Inadequate execution of this work can result in the brakes no longer working properly or the vehicle no longer braking optimally. This increases the likelihood of an accident. If the insurance company notices that the work has been carried out in an unprofessional manner, it can even refuse to cover costs after an accident. The brake pads and discs should be checked regularly, just like the spring cleaning of the car every year. So if you are not a specialist, you should rather have the brake discs replaced by professionals. Regardless of whether you do the change yourself or hire a workshop, you can always save money when buying the brake discs. Online retailers such as DAPARTO offer the option of finding the right spare parts quickly and easily using a search mask. In addition, the brake discs of different manufacturers can be compared with each other and the cheapest offer can be found. With DAPARTO, you can save up to 80% when buying new brake discs.

First of all - jack up the vehicle, remove the wheel

Anyone who works on the brakes and replaces parts always has to work in pairs and replace the parts in pairs. If this tip is ignored, it can lead to one-sided pulling behavior when braking. It is important for all work steps to jack up the vehicle. Ideally, the work is done with the help of a lifting platform, such as those available in DIY workshops. Lifting up with a normal jack is also possible, but this makes it difficult to replace the brake parts in pairs.

The first thing to do is get the wheel down. It's very easy, like a normal wheel change. If the wheel is off, the brake calliper can be seen directly behind it, which is attached with retaining clips and protected with dust caps. These caps must be removed in order to then use a ratchet to loosen the sliding bolts that are located under the dust protection caps. To remove the brake caliper, simply turn it back using the corresponding reset kit. In newer models, this can cause problems with the electronics, as the electric parking brake is usually activated. If this is the case, settings must be made on the electronics in order to activate the service or repair mode.

The brake caliper is now free

When the caliper is free, the brake pads are easily accessible and easy to remove. Now there are still the brake pad holders on the vehicle, which are in direct contact with the brake disc. The fixation can be easily loosened with the appropriate screwdriver. It is now possible to remove the brake discs from the wheel hub. Often, brake disks are connected to the hub with their own screw connection; this must be checked on a case-by-case basis.

When replacing brake discs and pads, it is not necessary to replace other parts of the braking system. In order for the renewed brakes to function properly, it is necessary to thoroughly clean and maintain the brake system. To do this, the wheel hub, brake caliper and pad holder must be thoroughly cleaned of dirt. The wire brush tackles coarse dirt. There are special brake cleaners available from specialist dealers for cleaning discs and pads, which are also suitable for all other components of the brake system.

Fit the new washers and blocks

The new parts are installed in the same way as for dismantling, but in the reverse order. The new brake disc is first placed on the wheel hub and then the new brake pads are mounted on the brake pad holder. Here it is very important to apply a special brake grease to the contact surface of the brake pads before the pads are installed. This ensures that this part of the vehicle remains movable. The grease also prevents the brake components from rubbing against each other.

If the brake pad holders are properly prepared, they are fastened with the previously cleaned screws. The various manufacturers specify a torque to tighten the brake discs. This value must be adhered to in order to guarantee safe and optimal braking behavior. Too loose or too tight can both have negative effects on braking behavior and become a serious safety risk.

Now mount the brake pads

Once the brake discs and the brackets for the brake pads are in place, the brake pads can be inserted. It is important to use the correct brake pads on the respective side. The brake pads are different for both sides. The brake pads that come out are provided with a clip. The brake pads are then inserted into the pistons of the brake caliper. If the brake pad and pad are correctly installed, they can be pushed over the brake disc. Now you have to grease the sliding bolts, put them through the brake calliper and screw them on with an Allen key. Here, too, there is a specification for the correct torque. Finally, you need to reassemble the dust caps and attach the handrails. These parts can be fastened with a simple, suitable screwdriver - as with dismantling.

Bleed the brake system

When the brake system is opened, air enters. In order for the brakes to function properly after replacing the brake discs, it is necessary to remove this air from the system. This happens on all brake calipers, as they are all connected to one another via the system. This means that all brake calipers must be bled, including those on the axle that you have not worked on.

Bleeding the brake system is a bit tricky and requires specialist knowledge. If the bleeding does not take place, the air in the system can mean that the power transmission to the brake system by pressing the brake pedal does not have the expected effect. This could be dangerous if you need to brake quickly at high speed.

Tip: The new brake pads and discs need a little time to work 100 percent. Before a long car journey, it makes sense to test the braking behavior on a safe route. To do this, accelerate slightly and brake again and again.

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