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.
Installing R14 brakes instead of R13
According to the data from the table, you can see that to switch from R13 to R14 brake discs, no modifications are required and the cost of modification is low (buy R14 brake discs and fixed caliper brackets).
Don't forget to check that the rims are at least R14 in diameter. We improve the brakes using the familiar instructions for replacing brake discs.
Most car owners, after installing R14 brake discs, feel a noticeable difference when braking and remain satisfied. However, this is not the limit, the brakes can be made even better!
What signs indicate that the disk needs to be replaced?
During active travel, the braking mechanism wears out and becomes unusable. The minimum thickness of the Lada Kalina brake disc (17.8 mm) must be no less than the expected wear indicated on the rotor end.
The first sign of brake disc wear is the need to press the clutch pedal harder. Unusual behavior of the car when braking, its pulling in different directions when pressing the brake pedal may indicate critical wear of one of the discs.
When worn, the thickness of the brake disc on the Lada Kalina decreases and is reduced to a minimum.
Thickness
Watch the thickness of the rotor. This is the first parameter that will indicate its wear. If ignored, there is a risk of system failure along the way.
Self-assessment of brake disc wear
More recently, auto parts manufacturers have been making rotors with substantial thickness. But now many have come to the conclusion that the large thickness of the Kalina brake disc is unprofitable for them. They are now available in significantly smaller thicknesses. The thickness of the brake disc on Kalina 2 is the same as on Kalina 1.
The permissible thickness of the Lada Kalina brake discs is indicated in the instructions that come with the kit, or on the casting itself.
A thin rotor dissipates heat generated during friction worse. It may eventually crack.
Form
Brake chatter can be caused by a crooked hub or uneven wear on the rotors.
The cause of the misalignment may be contamination of the seat or a bent hub, residual deformation of the point of contact with the hub. If there is uneven wear, you should check the thickness at 8 points.
But it happens that when buying new VAZ disc brakes you can stumble upon a defect. To check quality, simply measure the thickness at 3 points and compare with the installation documentation.
Surface condition
The condition of the surface may indicate brake wear.
If you see such a picture that the rotor has acquired a bluish tint, the oxidation process has begun. The part has been overheated and needs to be replaced.
Old and new brake discs on the Lada Kalina hatchback
The appearance of potholes, deep scratches, and cracks indicates serious malfunctions. Subsequent trips will lead to jamming of the system and disastrous consequences on the road. The part may be deformed - this can be easily checked by spinning it. If the rotation is uneven, the brake rotor is bent, it should be replaced.
Installation of brake pads and discs from a foreign car
Instead of original VAZ brake pads and brake discs, install consumables from a foreign car, for example:
- Brembo brake discs (article: 09.8903.75) or ATE Power Disc 14 (article: 24.0320-0142.1);
- pads from Fiat (article: 13.0460-2813.2) or BMW (article: 180281).
No modifications or design changes to the brake system are required. The maximum that may be required (for example, for pads from BMW) is to slightly file the caliper brackets.
How are these components better? The discs have an increased contact area of the pads, and the brake pads have an increased contact area (by about 25%). According to reviews from car enthusiasts, the installation of imported brake pads and discs had a positive effect on the performance of the braking system.
What kind of feedback can you leave about such a simple brake tuning? Is it worth switching from R13 to R14 brakes and abandoning original spare parts in favor of imported ones? Let us remind you that other useful tips for improving Lada cars can be found in the “Tuning” category. For example, you can significantly reduce noise in the cabin by installing additional door seals.
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| Larisa on the entry Engine cooling system… |
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| What kind of brake discs... to the entry Transitioning from 13″ brakes... |
Brake disc wear standards
Actually, how to determine that it is time to change the brake discs? It would be nice to use some objective units of measurement. I'm interested in the stylish front ones for Brembo Gold, and the rear ones are good for company. If an outer edging of about 1mm appears, is it “it’s time” or “it’s still coming”?
Don’t send it to a service center - well, you’re just too lazy to go there just to look at the wheels.
I already have all the 2.5 mm piping.. I don’t care if I roll it. especially in winter. =)) and wisely 2 mm and throw away or grind =)
How should this whole circus end? Well, should they start beating or what?
Measure the width of the brake disc with a caliper, min 22 mm in my opinion, it all depends on the model, you don’t need to look at the edge.
Yes, complete wear of the discs. They’re not overheated, so they don’t hit =).. the meat pads were just standing there and they were gobbled up like that. skate if they don't hit you.. =)
I think according to the standards, wear and tear is more than 1mm, but in fact you can ride until they score
There it should say min on the disk, but you can still deviate from these standards by 3 mm or more, nothing will happen. Tested under extreme conditions. They will beat when they overheat and start to drive, but I never got the disc from the Brambo, it was 18mm. Stock discs from the brackets led every month and new ones!
on 90% of machines, maximum wear is 1mm on each side of the disc.
I'll be meticulous.
Stock wheels from the Fox style under Brembo Gold, ventilated wheels - where to measure? Half or total thickness?
What does complete wear mean? Will they fly apart at speed? tfutriraza Or will the edges of the disk seem simple?
1mm from where? From the edging?
Where is it written? Is it possible to see it without removing the wheels?
Front discs minimum 28. maximum 30. that's for sure
— 2 mm from the nominal value — manufacturer’s recommendation for 4 pistons and brembes. If the disc is more than 330 mm in diameter up to 3 or more. It is measured not along the edge, but along the working surface. For example - 4 pot vrh - new (stock) width 24 mm, with 22 mm remaining - replaced (2 sets of pads). On some sets of reinforced versions there are either larger tolerances - 4-6 mm, or color indication. Overheating and beating are only part of the wear.
If there are cracks, it's in the trash. Serious cracks all over the surface. IMHO
In the manual, in my opinion, it says simple front discs with a nominal value of 32 mm, as soon as you erase them to 28, throw them away. I don't remember the rear ones. Naturally, if there are cracks, then immediately throw them in the trash. Brakes = safety. Driven discs can, of course, be sharpened. Just don't expect them to return their original balance.
If you can’t measure, usually the edge appears along the edge of the disk; you measure its thickness, not the working surface of the disk. You need to measure with a micrometer. In 2-3 places along different radii. Usually minus 1mm from the nominal value per side - for a replacement disc. The thickness is indicated on the back side of the disc (near the place where it contacts the hub. Or look at the manual. If there is a rim/uneven working surface, it is advisable to sharpen it before installing new pads. I usually just remove this rim with a file/grinder.
Installing R14 brakes instead of R13
According to the data from the table, you can see that to switch from R13 to R14 brake discs, no modifications are required and the cost of modification is low (buy R14 brake discs and fixed caliper brackets).
Don't forget to check that the rims are at least R14 in diameter. We improve the brakes using the familiar instructions for replacing brake discs.
Most car owners, after installing R14 brake discs, feel a noticeable difference when braking and remain satisfied. However, this is not the limit, the brakes can be made even better!
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.
And it doesn’t matter what kind of car we’re talking about. Brakes wear out everywhere, be it:
- VAZ 2110;
- Mercedes E-Class;
- Skoda Octavia;
- Subaru Forester;
- Daewoo Lanos;
- Chevrolet Aveo;
- VAZ Niva;
- Chevrolet Niva;
- Nissan Qashqai;
- Mitsubishi Galant;
- Chevrolet Captiva;
- Lada Kalina;
- Opel Astra, etc.
The first step is to remove the wheel from the side where there is a potentially problematic part.
Snapshot2
Attention! The brake pads of the front wheels must be replaced as a set - all four pads. Replacing the pads of only one brake mechanism can lead to the car pulling to the side when braking.
If the fluid level in the brake hydraulic reservoir is at the MAX mark, then before installing new pads, use a syringe or a rubber bulb to pump out some of the liquid from the reservoir so that when the piston is recessed into the wheel cylinder of the brake mechanism, liquid does not flow out from under the reservoir cap.
After removing the front wheel, we securely fix the car on a factory-made support stand.
What kind of front brakes does AvtoVAZ install on the Lada?
| Brake disc size | R13 ventilated | R14 ventilated | R15 ventilated |
| Where are they installed? | Lada Kalina and Granta from 8th grade. engine | Lada Priora (8 and 16 grades), Kalina, Granta (16 grades) | Lada Kalina and Granta sport |
| Visual differences |
The brake disc is significantly smaller than the boot
The brake discs are completely covered by the boot
Installed only on sports versions of Lada cars Catalog numbers of front brakes Suitable wheel rims R13 and more R14 and more R15 and more
