How to determine the diameter of VAZ brake discs

This article will help answer all the questions about switching from one brake to another. It will also help you figure out what kind of brakes you currently have. To do this, consider the stock front brakes for front-wheel drive VAZ: 2108-21099, 2110-2112, 2113-2115, Kalina, Priora, Granta

R13 not ventilated

They were installed on the SAMAR and SAMAR-2 families, as well as on the 10th family (only with an 8-liter carburetor engine).
Explosion diagram Caliper
Visually, they can be distinguished by the lack of ventilation on the brake discs, in addition to the characteristic 2108 boot.

R13 ventilated

They were placed on families 10, Kalin, Grant exclusively with 8kl.
engine. Explosion diagram Caliper
Visually, it is easy to distinguish from 08 by a wider disk with ventilation. Brakes from R14 can be visually distinguished by the brake disc boot ratio.

R14 ventilated

They were installed on families 10, Prior (even with 8kl. ICE), Kalin, Grant with 16kl.
engine. Explosion diagram Caliper
Visually easily determined by the ratio of the brake disc boot. The disc will completely cover the boot. There is another option, remove the fixed bracket and 2112 should be stamped on it. In addition, it is simply impossible to install wheels of 13 radius.

R15 ventilated

They were placed on the Kalin and Grant families from 16kl.
engine in the sport version. Explosion diagram
Standard R13″ ventilated calipers are used (movable caliper 2110, fixed caliper 2110 which is machined to fit a wider brake disc).

And to extend the guide to a larger radius, the plant uses “bone” adapters

When installing them, you need to file the ears on the fist

There is another option that is almost factory-made. Install the Volga calipers using a special spacer. They have their own brake pad, which, in addition to everything, has an even larger area compared to the VAZ one.

RESULT:

1) When moving from R13 non-ventilated to R13 ventilated, you will need: - Caliper bracket 2110 movable 2110-3501017 - Caliper bracket 2110 fixed 2110-3501155 - Brake disc housing right VAZ-2110 (14 inches) 2112-3501146 - Brake disc housing left VA Z -2110 (14 inches) 2112-3501147 — Brake disc VAZ 2110 (13 inches) 2110-3501070 As you can see, we will need brackets, boots and the brake discs themselves. You can leave the old calipers.

2) When moving from R13 non-ventilated to R14 ventilated, you will need: - Caliper bracket 2110 movable 2110-3501017 - Caliper bracket 2112 fixed 2112-3501155 - Brake disc housing right VAZ-2110 (14 inches) 2112-3501146 - Brake disc housing left VA Z -2110 (14 inches) 2112-3501147 — Brake disc VAZ 2112 (14 inches) 2112-3501070 As you can see, we will need brackets, boots and the brake discs themselves. You can leave the old calipers.

3) When switching from R13 ventilated to R14 ventilated, you will need: - Caliper bracket 2112 fixed 2112-3501155 - Brake disc VAZ 2112 (14 inches) 2112-3501070 As you can see, we only need a movable bracket and the brake discs themselves. The calipers can be left as old, the boots were originally designed for R14 brakes, the movable caliper remains the same.

4) When switching to R15 ventilated ones, you will need: - Movable caliper bracket 2110 2110-3501017 (but it needs to be sharpened) - Fixed caliper bracket 2112 2112-3501155 (only if you have R13 not ventilated) - Spacer for the fixed bracket - Disc 15 inch brake

IMPORTANT: after installing R14 brakes, you will definitely have to switch to R14 wheels or a larger radius!

Minimum permissible thickness of brake discs:

For ventilated 17.8 mm For non-ventilated 10.8 mm

Brake pads

For all the brakes described above, there is only one type of pad - 2108. All other differences: (the presence of a wear sensor, friction material,
but not thickness
, its location, various grooves and grooves already depend on the manufacturer).

From personal experience I will say that after switching to R13 ventilated brakes, braking became more effective, squeals when braking almost disappeared. Due to better cooling of the brake disc, its volume and weight increase and heat dissipation becomes faster. When switching to R14, braking becomes even better, especially noticeable at high speeds, due to the increase in the friction surface (the volume and mass of the disc still increases) and the removal of the point from the center of rotation (to put it roughly and simply, the “effect of increasing the shoulder”). If you install a brake disc with perforations and grooves, the braking performance will further increase due to the removal of water and friction material of the brake pad from the contact patch.

Expensive foreign cars are equipped with disc brakes on all wheels as standard, which allows them to confidently brake from high speeds. An obvious disadvantage of domestic cars is the not very effective braking system, especially during dynamic driving. How can this state of affairs be corrected?

How to easily determine brake disc wear by visual inspection

Hi all! I think every motorist is interested in maintaining his own vehicle in good condition. Moreover, special attention should be paid to the braking system. That is why the topic of our conversation will be how to determine the wear of brake discs.

People are also often interested in the question not only about the degree of wear of discs, but also pads. This is true more on cars, although the braking system is present on a motorcycle and even a bicycle. Let's immediately agree that the conversation will be about brake discs, not pads, and only strictly about cars. By the way, I separately talked about replacing brake pads in an article that you can read at the link.

The purpose of the brakes is to ensure timely stopping or reducing the speed of the machine. Moreover, the brake must respond instantly to the driver pressing the corresponding pedal. The speed at which a car brakes directly depends on the current condition and serviceability of the brake system components in the form of pads and discs. The stopping of the machine is due to the work of the friction force. To ensure that the discs do not wear out during friction, high-quality and durable materials are used for their production. But they are not eternal either. Wear and tear comes sooner or later.

Captain-Smollett › Blog › VAZ front drive brakes

R13 not ventilated

They were installed on the SAMAR and SAMAR-2 families, as well as on the 10th family (only with an 8-liter carburetor engine). Explosion diagram Caliper

Visually, they can be distinguished by the lack of ventilation on the brake discs, in addition to the characteristic 2108 boot.

R13 ventilated

They were placed on families 10, Kalin, Grant exclusively with 8kl. engine. Explosion diagram Caliper

Visually, it is easy to distinguish from 08 by its wider ventilated disk. Brakes from R14 can be visually distinguished by the brake disc boot ratio.

R14 ventilated

They were installed on families 10, Prior (even with 8kl. ICE), Kalin, Grant with 16kl. engine. Explosion diagram Caliper

Visually it is easily determined by the ratio of the brake disc boot. The disc will completely cover the boot. There is another option, remove the fixed bracket and 2112 should be stamped on it. In addition, it is simply impossible to install wheels of 13 radius.

R15 ventilated

They were placed on the Kalin and Grant families from 16kl. engine in the sport version. Explosion diagram

Standard R13″ ventilated calipers are used (movable caliper 2110, fixed caliper 2110 which is machined to fit a wider brake disc).

And to extend the guide to a larger radius, the plant uses “bone” adapters

When installing them, you need to file the ears on the fist

RESULT:

Wear limit

Each brake disc has its own limited resource. It is set by the manufacturer from the factory, and resource wear is affected by mileage, braking intensity, the condition of the entire braking system, the characteristic features of the vehicle itself, etc.

When buying a new set of brake discs for his car, the driver must always follow the recommendations of the car manufacturer. Therefore, first we look at the instruction manual, or according to convenient catalogues, based on the characteristics of our particular machine, we select a part via the Internet. If you take a high-quality kit from a trusted manufacturer, you can be sure that wear will not occur very quickly, and when braking hard, the car will definitely stop, as you expected. The same applies to buying new pads.

There are international norms and standards for the production of such components for passenger cars. They oblige all manufacturers to make appropriate engravings or markings on products.

The essence of the engraving is to indicate information that relates to the maximum permissible degree of wear.

There is such a thing as the thickness of the brake disc. And it has a certain maximum wear limit.

To obtain the relevant information, you should look at the end part of the product. It is there that, according to international standards, all manufacturers of certified parts are required to display data regarding the wear of the brake part. Information about the initial thickness, as well as what thickness is considered minimal, should be located here. As soon as the disk reaches this value, it must be replaced. In fact, the manufacturer thereby relieves itself of responsibility. If a driver wears a disc below normal and causes an accident, he will not be able to blame the brake manufacturer or auto company for this.

There is an interesting feature here. When the question arises about when to change brake discs, many people look at the end side of the old product, but find nothing there.

This happens, but only on products that have not been certified or are counterfeit. It is strictly not recommended to buy such parts without information about wear.

Design and principle of operation of the VAZ 2114 brake system

The VAZ 2114 has a fairly effective braking system; it has a hydraulic drive and a vacuum brake booster. The front wheel brakes are disc, the rear wheels have a brake drum and pads. This device allows you to maneuver on the road with high efficiency and, if necessary, apply emergency braking. The braking distance of the VAZ 2114 at a speed of 80 km/h is ≈ 38 meters.

The front brake consists of:

brake disc - it is made of gray cast iron or carbon steel and must have grooves machined on it for effective air cooling during braking;
friction elements or brake pads in the amount of two pieces;
calipers;
piston;
protective anti-dust cuff and rubber sealing ring.

Typically, the front wheel brakes of the VAZ 2114 are characterized as disc brakes with a caliper, single-finger piston brakes with floating pads.

When the brake pedal is pressed, the fluid presses on the bottom of the caliper, it moves and puts pressure on the pad located on the inner surface of the disc. It presses against it and the caliper, under pressure, moves on the fingers in the opposite direction, forcing the pad, located on the outer side, to clamp the metal disc completely. As a result of the fact that the disc is clamped between the pads, the car is braked and the stronger the force on the pedal, the more effective the braking process. When the pedal is released, the pressure decreases, the caliper moves and the pads move away from the disc. The required clearance is maintained automatically due to the fact that the sealing ring in the cylinder is spring-loaded, including when the friction surfaces wear.

The rear wheel brake consists of a drum, to which both pads located in the drum are pressed during braking. They are secured with upper and lower tension springs. Both upper pads are pressed against the working cylinder, and the lower one presses them against a fixed stop. When the brake is applied, the pads are pressed by the cylinder piston against the inside of the brake drum. And when moving, due to the torque, the pressure of the shoe on the drum increases.

Determining the degree of wear

You have received basic information about the maximum and permissible wear. Now you need to find out exactly how the wear of a part is determined and what is required for this.

Not a single specialist or auto parts manufacturer can say 100% exactly how long a brake disc will last or how many kilometers it can travel. There is only a calculated resource, which is influenced by many additional factors. Yes, for starters it’s worth focusing on the quality of the disc itself, the raw materials used and adherence to technology. This is a question for the manufacturer. It's definitely not worth saving on brake discs. It is better to give preference to more expensive, but reliable and proven parts from leading manufacturers.

But there are other factors that provoke gradual or rapid erasure of the disk, exceeding the calculated values. These are driving style, condition of the brake unit, pad wear, climatic conditions, road surface condition, etc.

All this suggests that diagnosing discs is the task of the car owner himself.

It is unlikely that it will be possible to carry out an accurate diagnosis without removing the wheel. You can only visually try to take a closer look at the condition of the element through the wheel rim and roughly assess its current condition. But it will not be possible to check the disk for curvature or accurately determine the degree of wear.

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Minimum permissible thickness of brake discs:

For ventilated 17.8 mm
For non-ventilated 10.8 mm

Brake discs are distinguished:

Ventilated discs
With gas outlets
With perforation or grooves (slots)
Collapsible

Let's look at each point in more detail.

The first option is ventilated discs . They are two separate disks, fastened together in such a way that they resemble blades (like a turbine). Thanks to these blades and channels, heat is dissipated more efficiently and the weight of the disc is reduced. Example of simple ventilated brake discs .

During active braking, if the brake discs are not cooled enough, their temperature can reach 180-250 degrees. Regular pads start to smoke. The gas released when the pads rub against the heated disc serves as a layer between the disc and the pad and prevents the pads from fitting tightly to the brake disc. This is the main problem why braking disappears . To prevent such cases, there are gas outlets, perforations and grooves. An example of brake discs with gas outlets .

Another reason for brake failure can be carbon deposits on the pads, which appears during frequent braking (on a race track). This carbon deposit turns the block into a slippery ski. Gas outlets and perforations cut off this slippery layer, renewing the pad. But they make brake pads wear out faster . Example of brake discs with perforations and grooves .

In addition, perforations together with grooves help remove water, dirt, and dust, which reduces the risk of scratching the brake disc. They also increase additional braking force and reduce disc wear . An example of brake discs with gas outlets and perforations .

The fourth option is collapsible disks . As we already know, when braking, the brake discs heat up and the heat is transferred to the hub, and at high temperatures this unit is likely to fail. This is why some companies offer collapsible brake discs . They are a working disk, which is bolted to the middle part, which is attached to the hub. An example of dismountable brake discs .

Because The majority of car owners operate their cars on city roads, and not on ring tracks and races, then the effectiveness of standard brakes will be sufficient . If you still want to improve the car's braking system , then you should not install rear disc brakes, but rather change the brake discs to a larger diameter and install perforated brake discs . You will feel the difference immediately, not only in braking, but also in the appearance of your car (for example, by illuminating perforated wheels with LEDs).