Malfunctions of the vacuum brake booster VAZ 2110
Devices from different manufacturers may vary in characteristics and quality, and the price of the VAZ 2110 vacuum amplifier may also vary. Since the functioning of its mechanism affects the operation of other parts and components, and above all the car engine, it is worth not saving and carefully monitoring its serviceability.
If there is a hissing sound from under the hood, a burnt smell of oil is felt in the cabin, and the brake works like a stopped car only after repeatedly pumping the brake pedal with your foot, then you should immediately contact a car service center for diagnostics and, if necessary, replacement of this device.
Table of dozens of faults in the vacuum brake booster and methods for eliminating them
| Signs | Diagnostics | Conclusion | Elimination method |
| Hissing when braking | The engine is running, press the brake pedal and at the same time detect a hissing sound in the pedal area | The integrity of the diaphragm is compromised | Diaphragm replacement, total VUT |
| Hissing when the engine is running | The engine is running and a hissing sound is heard in the engine compartment. The engine runs unstably; when you press the brake pedal, the speed increases slightly briefly | The integrity of the pipe connecting the VUT and the intake manifold is damaged | Search for air leaks, elimination, replacement of pipe |
| Soft “cotton” brake pedal | When you press the pedal, it steadily, non-stop “goes” to the floor. When braking there is no feeling of stable resistance to pressing force | Depressurization of the hydraulic system, air ingress | Searching for leaks, checking fluid levels, bleeding brakes. |
| The car does not “slow down” | When you press the pedal, the braking is delayed, the pedal travel is not enough to lock the wheels | Large free stroke of the rod | Adjust idle speed |
Articles
- 21100-3510010-00 — native VUT
A common replacement is AUTO TECHNOLOGIES AT 1001-010VB.
AUTO TECHNOLOGIES AT 1001-010VB
- TRIALLI VA 550
- DAAZ 21100-3510010-00
- DAAZ 2110.3510010
- FENOX VB10003C3
How to check the vacuum brake booster of a VAZ 2110
You can check the vacuum brake booster “tens” for proper operation yourself. To do this, press the brake pedal repeatedly with the engine off. This method checks the uniformity of pressure in the cavities. Everything is fine. Then, when you hold your foot on the brake pedal, the engine starts. If the pedal is moved forward simultaneously with the foot, then the amplifier is operational. Otherwise, you need to make sure that the problem is this and not a problem with the tip flange or its fastening.
Vacuum brake booster VAZ 2110
The pedal may still not function properly due to a faulty connection of the fitting on the engine exhaust pipe to the hose. This also has a detrimental effect on the performance of the braking system and its efficiency. when the valve body does not stick.
What is it, why, how does it work
VUT for VAZs is a device that is responsible for braking the car. Due to the vacuum, it helps create additional force on the brake pedal. Thus, it simplifies the operation of the braking system - the car wears out less, stops faster, and the driver needs to put in less effort behind the wheel.
But it's not that simple. On VAZ 2110 cars, brake boosters affect engine performance,
Therefore, you need to listen to their serviceability and look much more closely than to the “jamming” of other parts. At idle, the injection on this car is equal to 3-4.5 milliseconds from 7 to 12 kg of air. At the slightest violation of the mixture ratio (air, fuel and evaporation), the engine will stop working evenly and begin to stall. There will be leaks in the cylinders, due to which the spark plugs may fail, the wear rate will increase, which, in turn, will increase fuel consumption and the cash costs of maintaining the machine. And all these problems are caused by air leaks from a faulty vacuum brake booster of the VAZ 2110.
On cars of the VAZ 2110 series, a braking system is used based on diagonal separation of circuits. It works according to the following scheme:
- The first hydraulic drive circuit ensures efficient operation of the left front and right rear wheels;
- The second brake circuit is responsible for the operation of the right front and left rear wheels.
Thus, if one of the circuits fails (even while driving along the highway), the second will cope with a safe stop - the car will not spin, which significantly reduces the risk of damage to both the vehicle itself and the passengers in it.
When to change the vacuum brake booster
If the brake booster fails, a hiss may appear when you press the brake pedal, and the speed may also go up and then down, in addition, the brake pedal will become difficult to press (This is equivalent to the fact that the car is turned off) basically this is there are all the symptoms that indicate that the vacuum booster has failed, it does not always happen that they all appear together in the car, but a couple of them will still appear when the vacuum booster becomes unusable (the main ones most likely, namely, tight brake pedal and floating speed).
By the way, the vacuum booster can be checked for serviceability as follows: With the engine off, press the brake pedal 5 times and when the last press is made, hold the pedal to the floor, immediately after which start the car, if the pedal falls a little, this will indicate that that the vacuum booster is fully operational!
Examination
Typically, a vacuum booster is checked for serviceability as follows:
- Without starting the engine, you need to press the brake several times (as when pumping);
- After the 5th – 6th press, lock the pedal in the pressed position, start the engine;
- As soon as the engine starts, the pedal moves forward slightly on its own. This is if the vacuum booster is working properly.
If a vacuum is not created, then the first thing you need to do is check the connections and the hose itself for leaks, as well as the check valve of the VAZ 2110 vacuum tank. Often the reason is a malfunction (ruptures, cracks) of rubber parts that require replacement.
In this case, repairs will help, namely replacing faulty parts with serviceable ones.
An internal part, such as the diaphragm, may require repair; over time, a hole may appear in it.
The diaphragm is sold as part of a repair kit. The price of the VUT VAZ 2110 repair kit fluctuates around 250-400 rubles.
How to remove the vacuum brake booster of a VAZ 2110
We remove the vacuum booster and brake pedal assembly after removing the engine compartment upholstery, trim and windshield trim.
- Replacing the vacuum brake booster on a VAZ 2110. The reason for the replacement was that a hissing sound appeared when pressing the brake pedal, which could cause the engine to stall at any moment, the brake pedal became tight. To replace the vacuum booster, it is necessary to disassemble the rear wall of the engine compartment; remove the rubber seal (1), unscrew the upholstery (2) and remove the frill (3).
- Disconnect the block from the brake fluid level sensor, disconnect the hose from the vacuum booster, and unscrew the two nuts of the brake master cylinder.
- After that, carefully remove the main brake cylinder (without unscrewing the brake pipes) from the vacuum booster to a distance sufficient to remove the vacuum booster.
- Inside the car, under the dashboard (under the instrument panel), unscrew the four nuts and remove the wires from the frog. The most difficult thing in replacing the vacuum booster is unscrewing these four nuts, they are very inconveniently located.
- We remove the vacuum booster along with the pedal assembly.
- Remove the locking plate and push out the vacuum pusher mounting pin.
- Unscrew the vacuum booster from the pedal assembly.
- We install a new vacuum booster, pay attention to the correct installation, the pedal is at the bottom, and the hose fitting is at the top. Next we assemble in reverse order.
Improvement of the braking system
Many VAZ 2110 owners agree that the factory brake system is far from perfect. Therefore, they decide to modernize and improve the unit using technical tuning.
A popular solution to the issue of brake efficiency is to replace drum mechanisms with disc ones. Of course, in the case of the “ten” we are talking about the rear wheels. When replacing brakes, be sure to take into account the fact that the rear wheels must brake more softly and somewhat later than the front wheels. This way the car won't skid and you won't fly off the road.
Another option is to remove the factory brake master cylinder and vacuum booster. Instead, units from Priora are excellent. Such tuning will eliminate vibrations and also allow you to use the brake pedal effectively and without excessive effort.
Regardless of the changes made to the brake system, after each modification it is mandatory to pump the brakes.
Which vacuum cleaner to buy
Brakes are the most important system in a car. Repairs should be approached responsibly. The vacuum booster is an expensive unit. Therefore, the owner may have the idea of buying a used spare part. In this case, you can really save money. But, the old vacuum seal can fail at any minute, which means the money was wasted. In addition, disassembling the VAZ 2110 and then replacing the vacuum seal may be in vain.
Consumer choice
| Lucas | 9.4% |
| Iruna | 2% |
| TorgMash | 53.3% |
| Technomaster | 0.8% |
| ProSport | 2% |
| Sport | 2% |
| AT, Czech Republic | 0.8% |
| Factory VUT | 23.1% |
| Another VUT | 5.5% |
| Axiom | 1.2% |
| The leader of this competition was TorgMash, with 53.3% of the votes cast for it. | |
It is better for the car owner to fork out the cash and purchase a new VUT from such manufacturers as:
- LUCAS TRW – from 5,900 to 6,500 rubles (assembled: with reservoir, bracket and brake pedal);
- TorgMash – 2,320 rubles;
- DAAZ (2103-3510010) – from 1400 to 2250 rubles;
- Fenox (f-VB10001C3) – 1,560 rubles;
- TRIALLI (va551) – 1450 RUR;
- QUARTZ (qz2170351) – 1,050 rub.
A factory VUT, complete with pedal and TJ reservoir, will cost about 4,900 rubles. Among car owners, DAAZ and TorgMASH spare parts are especially respected. It is these manufacturers who become the leaders of voting on auto forums.
