Do new brakes need to be run in after being installed?
There are many issues in the automotive world that we are looking for answers to. One of them is the question of whether new brakes need to be run in after being installed? Today we will clearly describe what needs to be done.
In the article:
Deceleration through friction
How to properly install new brakes?
Do new brakes need to be run in after installation?
New set of discs and pads and running-in
Why is proper running-in so important?
Don’t forget about brake fluid
Replacing brake discs and pads is a service activity that we have to undergo many times in our automotive life. Most often, we entrust this work to a mechanic because we do not really have the time and skills to service the vehicle ourselves. The question often arises then, whether new brakes need to be run in after being fitted?
Deceleration through friction
Rolling resistance can be our ally or our adversary. When we want to slow down the friction generated by the wheels rolling on the road, the slight mechanical resistance of the individual parts of the drive system, as well as the direct friction of the brakes against each other, allows us to lose speed.
When picking up speed, each resistance forces the need to use more energy. Therefore, in the case of problems with brake calipers that do not fully return to their place, we can observe an increase in fuel consumption. The pad stops moving back, touches the disc and increases rolling resistance.
These two examples show very well how important it is for new brakes to work together optimally after being fitted. When we need them to slow the vehicle down effectively. If we want to accelerate dynamically and travel economically, they have stopped generating additional resistance to be overcome by the drive unit.
How to properly install new brakes?
Once the brake discs or pads are worn out, we must adhere to specific procedures. Sometimes, for one disc replacement, there are two pad replacements. Therefore, it is important to regularly check the thickness of these components. If it turns out that they need to be replaced, you need to choose sets of components designed for your model. All the most important information can be found in Rotinger catalogs.
It is important that the brake pads adhere well to the mount in the caliper and to the brake disc. It is worth paying close attention to which brake pad is external and which is internal.
Do new brakes need to be run in after installation?
If we decide to replace only the brake pads, while keeping the previous discs, it is necessary to take into account the fact that the new pads must “get used to” the uneven surface of the disc. The first few kilometres are crucial here, as the pads are not yet working with their entire surface. The correct running-in process in this scenario involves avoiding sudden and intense braking, which allows the pads to gradually adapt to the unevenness of the discs.
New set of discs and pads and running-in
If we replace both discs and pads, the running-in process takes on an additional dimension. New elements must not only learn to cooperate with each other, but also create a thin composite layer on their surfaces. This layer is crucial for stabilizing the friction coefficient and protecting against physical adhesion of materials. To achieve this, it is recommended to avoid heavy braking for the first 200-300 kilometers of driving. The ideal solution is to perform 5-6 braking from a speed of 50-60 km/h to a full stop, with a uniform pressure on the brake pedal.
Why is proper running-in so important?
The brake running-in process is not a mere formality. It has a direct impact on:
- High efficiency and modulation of braking force,
- Reduction of wear of friction parts,
- Reduction of noise during braking.
Skipping or incorrectly performing this process can lead to faster wear of new parts, longer braking distances, and even steering wheel vibrations or squeaking when braking. In extreme cases, improperly run-in brakes can even lose their effectiveness due to overheating.
Don’t forget about brake fluid
The last but equally important element when servicing the brake system is checking the condition of the brake fluid. Its task is to transfer the force from the brake pedal to the pads. Overheating or wear of the brake fluid can result in a loss of braking efficiency, even if the discs and pads are in perfect condition.
As the discs and pads wear out, the brake fluid decreases. If its level is within the norm, it should not be topped up. After replacing the brakes with new ones, the amount of fluid in the expansion tank will increase. As a result, earlier refilling of its lack may result in exceeding the maximum recommended level. Running in new brake elements is an essential element of every replacement, which ensures their long and trouble-free operation. Let’s remember a few simple rules. We can significantly extend the life of our brake system and enjoy safe and comfortable driving. Regardless of whether we only replace the pads or decide on a complete set, it is crucial to gradually accustom the new parts to work in the specific conditions of our vehicle.
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