The front brake disc is heated: possible causes, troubleshooting and feedback

Disc brakes were invented back in the 20 th century, but actively began to be used only in recent decades. It was then that the design of these systems was perfected. Brakes - this is the thing that should always be serviceable. However, even this system sometimes fails. So, after a while the driver starts to notice that the front brake discs are heated very hot. Is it normal? Of course not. And in today's article we will consider why the front brake discs are heated and what is the reason for this phenomenon.

What is the normal temperature?

As the material for the production of these elements, alloyed cast iron or steel is used. There are also ceramic brake discs, however, because of their high cost, they are used only on expensive sports cars. Although these elements are the least susceptible to overheating. Ceramics do not deform even at a temperature of one thousand degrees Celsius. As for conventional brake discs, which are completed by 90% of cars, their operating temperature is up to 300 degrees Celsius. Anything higher causes deformation and increased wear.

Requirements

There are several requirements for brake discs. They must be strong, resistant to thermal shock and high thermal conductivity. Also, the brake discs have good adhesion and a high coefficient of friction. Only when all these parameters are met, the disks can be installed on a production car. Otherwise, traffic safety will be a big question. With overheating, the pads will simply slide over the work surface, not performing their basic functions - friction and adhesion.

Why is this happening? Causes

Motorists ask themselves: why is the front brake disc heated ? The reason for this phenomenon is related to its main function - inhibition. So, when you press the pedal, the pads begin to interact with the surface of the disc. At this point, the heating of the element is at the peak value. The longer the shoe will be in mesh with the disc, the higher the metal temperature. Heating occurs instantly. However, the cooling time is dozens of times longer. Of course, much depends on the style of driving. If you drive the car aggressively, even a normal drive will not have time to cool down (except that it will be made of ceramics). How to be in this situation? If you are warming the front right brake disc, then you need to reconsider your driving style. Count how many times you press the pedal for a certain part of the path. But it happens that the metal is heated and with a calm manner of driving. So, the next reason to consider is the malfunction of the brake system itself. Check the level of the working fluid in the reservoir. If it is not enough, top up the volume. Also remember that the life of the brake fluid - no more than two years. Why so? The fact is that such a liquid is very hygroscopic - it easily absorbs moisture. In order to avoid troubles and air congestion, experts recommend periodically changing it.

Pads

Now go directly to the mechanical part. The first thing you should pay attention to is the pads. On their surface there is a friction material. This pad has special wear marks. When the layer is less than three millimeters, the part needs to be replaced. Otherwise, the heating coefficient will increase - the metal will rub against the metal. Should the front brake discs warm? Of course not. If the pads are worn to the ground, at one point they can simply jam. The car will go. Do not pull with the installation of new ones - change the pads according to the rules. It ranges from 20 to 30 thousand kilometers. And because much depends on the style of riding, the manufacturer identified special risks in the middle of the lining. When the friction material is worn down to these marks, the pads must be replaced. After this operation, it is necessary to pump the system by opening a special valve on the slide.

Drives

Check its thickness. Often in the UAZ "Patriot" cars heated front brake discs are heated because of the banal working surface. Some use a groove. However, you can do this only once. And better - immediately change the disk to a new one. Its resource is an order of magnitude greater than that of the pads, 150-200 thousand kilometers. However, many people forget about him and drive with worn disks, not suspecting that soon the brakes will warm up.

Other factors

It happens that the disc does not live up to its resource. And it's not always factory marriage. So, if the front brake disc is heated, it may be corrupted due to high temperature changes. How does this happen? After an active manner of driving, the car gets into a puddle. до 300 градусов и резко охлаждается. As a result, the front brake disc is heated to 300 degrees and cooled sharply. Naturally, this causes deformation of the working surface.

Determine the state of the disk

To find out the exact cause, you need to make sure that the disk is really working in high load mode. How to do it? Determine the state of the working surface can be visually, by color. A pyrometer will not be useful to you. So, if the surface of the disk is blue, then the metal was heated to 450 degrees Celsius. Worse, if the shade is black. In this case, there is every reason to assume that the brakes were heated to 500 degrees Celsius.

Helpful Tips

The fact of overheating of brake elements is far from the most pleasant news for an automobile owner. After all, to eliminate the problem requires a complete replacement or groove details (which is also not a cheap pleasure). How to prevent this? You can save discs, you need to follow a few simple rules:

• Avoid any contact of water with the calipers. Do not use an aggressive driving style in wet and rainy weather.
• Particular attention should be paid to the washing. Wait for a while until your disks cool down. If water gets on the hot metal, deformations can not be avoided. In this case, only full replacement of disks will save. And they change in pairs (as well as pads), even if the neighbor is in a normal state.
• Follow the rules for replacing the pads. Do not wait until they wear out to the metal. This will cause deformation and increased heating of the disk.

Conclusion

So, we have found out, for what reasons the front brake disk is heated. Following the above tips, you keep the system in good order. On one disk it is quite possible to drive 300 thousand kilometers. The main thing is to eliminate overheating and monitor the serviceability of the piston workers of the support. By the way, the breakdowns in the system are also excluded. If the hose has been worn (as it often happens in the arches of the front wheels), do not hesitate to replace it. Otherwise, air will get inside and the braking will not be so effective.