VAZ 2114 generator hums

What causes a generator to hum?

This question is often asked on forums. Why does the alternator on a car hum and stop doing so as soon as the terminal is disconnected from the battery? At the same time, the more electricity consumers are connected to the car, the louder it can buzz. As for the voltage, it shows 14.05V without additional consumers, however, as the car accelerates, the voltage drops to 12.3.

Generator bearing and belt diagnostics

While the generator is running, with or without noise, it is rarely noticed. But as soon as it stops producing current, its absence is immediately noticed. The battery charging light comes on and the search for a fault begins. But it was enough to just listen to the sounds that the generator makes, and the trouble could have been avoided.

Replacing the VAZ 2114 generator bearing may be required as early as 60-80 thousand km. It all depends on how much the owner pays attention to such little things as the tension of the generator drive belt. First of all, this is what affects the resource of the generator. For prevention, let's check the degree of belt tension.

An ordinary eight-cylinder engine, which costs 2114, does not require special maintenance skills. On the tenth family, the belt is tensioned through a tension roller, but in 2114 there is none of this, and the belt itself no longer drives any mechanisms or assemblies. There is no power steering or air conditioning compressor. It's simple, the main thing is to buy the right belt. Its index is 21082-3701720, and it is better to take Gates or Bosch. Such a belt costs the same as two domestic ones, but its service life is longer. A German belt will cost 530 rubles.

SIGNS OF GENERATOR SET PROBLEMS

The battery is not charging

Undercharging or overcharging of the battery;
Poor headlights when the engine is running, unsatisfactory performance of wipers and other consumers of electricity;
A strong increase in the brightness of the headlights, boiling of the electrolyte in the battery;
Presence of extraneous noise from the generator set.

MALFUNCTIONS OF THE BRUSH UNIT

This unit may have problems with the electronic regulator and brushes. Replacing the brushes of the VAZ 2115 generator can be done without removing it from the engine. It is impossible to check this unit without removing it from the generator, so if there is such an opportunity, you can simply change the brushes. You can check its operation; there is an adjustable power supply and a control light. Connect the power to the “+” and “-” of the regulator, and the light bulb to the brush. It should glow, and when the input voltage increases to 15-16 volts, the light goes out. If this does not happen, then the tablet needs to be replaced. Let's look at the signs of brush wear. This will be indicated by:

Low on-board voltage;
Lack of battery charging;
Charging voltage surges.

Brushes in a free state must have a length of at least 0.5 cm. If the length is shorter, they must be completely replaced. Check the condition of the brushes and their free movement in the grooves. If there is a hang, it can be eliminated by dropping a drop of oil into the grooves. Check the slip rings and their surface for wear. If present, you need to sand the surface of the rings with fine sandpaper. When the brushes of the VAZ 2114 generator are replaced, performance will be restored in a few minutes, after grinding in the brushes and slip rings.

Alternator belt tension VAZ 2114

The tension of the generator belt is checked on a long branch, and the force should be about 10 kgf. To more or less accurately determine the force, you can use a simple household steelyard. If the belt deviates by no more than 10 mm at this force, the tension is fine. If it is less, the belt will be overtightened and this may end badly for the generator bearing, to which we are already returning.

But even if the alternator belt has always been in perfect condition, has not slipped or been overtightened, there is a possibility that the bearing may sing. Moreover, setting the sound source is quite simple. If a suspicious hum appears, it is enough to make sure that it is a bearing, since there are plenty of singers in that area. This includes the timing belt, the front cover bearing, the pump, and the timing belt tension roller. To accurately determine the malfunction, it is enough to remove the belt from the pulley and start the engine for a short time. If the noise disappears, it is our bearing that is making noise.

Prevention

You can prevent slipping of the generator drive by timely checking and correcting its tension level, replacing the belt if there is damage or severe wear.

It is important to monitor the condition of the engine seals and the cleanliness of the engine compartment. At the first sign of wear on the generator bearing, it is necessary to replace it.

During the operation of the vehicle, the motorist encounters various troubles. So, over time, the steering wheel begins to play and the suspension begins to knock. Sometimes the alternator belt whistles. Why is this happening? This problem can catch a motorist at the most inopportune moment. Well, let's look at why the alternator belt whistles on the Kia Rio (sedan) and other cars.

VAZ 2114 generator bearing numbers

Once we were convinced that bearing replacement was inevitable, all that was left was to simply select the bearing and replace it. In general, everything is simple, but with the huge number of fakes that flood the market, it would not hurt to know the dimensions of the bearing so as not to get into trouble. Since there are only two ways to find out the dimensions of the bearing - remove the generator and measure it with a caliper, or ask knowledgeable people. Knowledgeable people say that: the front bearing of the generator has an internal diameter of 17 mm and an external one of 47 mm; the rear bearing has an inner race with a diameter of 15 mm, and its seat is 35 mm; The width of the bearing race of the VAZ 2114 generator is 11 mm at the rear and 14 mm at the front.

Bearing replacement, instructions

Now for the procedure. There should not be any particular difficulties in dismantling the generator. Now that we have the generator in our hands, we can start disassembling it, but we will have to disassemble it completely. To do this, it is advisable to have a vice, and the process itself schematically looks like this:

Remove the back cover.
Remove the diode bridge.
Remove the brushes.
Unscrew the pulley nut, holding it in a vice through an elastic spacer so as not to damage it.
Attention! Be sure to mark the covers with a marker so as not to disturb the alignment.
Use brake fluid or magic WD40 to treat the tightening bolts and the cover mounting areas.
Unscrew the tightening bolts and remove the covers.
Use a wooden punch to knock out the anchor from the cage on both sides.
Use old bearings instead of mandrels to press in new ones.

It is done. The bearings are pressed in, now all that remains is to put everything back together so that the rotor does not touch the stator. After installing the generator and a new belt, we check the voltage at the battery terminals, if as a result the generator runs quietly, the voltage is at least 14 V, we can consider the mission completed. Good luck to everyone!

Instructions for removing the unit on a car with air conditioning

Before replacing the generator bearing on a Priora, you should stock up on a set of tools, which will include:

universal set of keys. Heads for 7, 10, 12, 13, 17, 24 are required;
set of hexagons;
universal puller for ball bearings;
minus and Phillips screwdriver;
To diagnose serviceability, you will need a multitester;

Removing a generator on a Priora Lux, with air conditioning and power steering

If you need to replace the generator bearing on a car that is not equipped with air conditioning, then it is convenient to remove it by dismantling the right headlight of the Lada Priora. The unit is located on the left side of the engine when viewed from the radiator. The best access to the mechanism is to remove the headlight and bumper mount on the passenger side.

Disconnect the terminal.
Remove the protective cover.

The headlight is attached to 2 bolts - one under the housing, the second from below the headlight. It can be accessed by removing the bumper mount on the right side.

Unscrew the top headlight mount.
Lower the right side of the bumper to gain access to the lower headlight mount.

Bearings

ATTENTION! A completely simple way to reduce fuel consumption has been found! Don't believe me? An auto mechanic with 15 years of experience also didn’t believe it until he tried it. And now he saves 35,000 rubles a year on gasoline! Read more"

First of all, experts see the reason in the bearing. Apart from him, there is nothing to hum there. Although in some cases the diode bridge may also produce a hum. You should know that the more consumers are involved in the car, the more difficult it is for the generator to turn. The load on the bearings automatically increases.

As you know, generator bearings are installed for easy rotation of the rotor armature. One of the bearings is placed in the front cover, the other is pressed onto the rotor. It is noteworthy that both bearings are pressed, so replacing them is not so easy.

Diode bridge

The hum can also come from the diode bridge. To check whether the diode bridge is shorting, you should remove the cover on the back of the unit, remove the diode bridge, and adjust the washers under the clamps with which it is screwed. And if you add an additional puck, it will be even better.

It also happens that a wire falls off the diode bridge. It’s a banal reason, but until you figure it out, you won’t see it.

Other reasons

The noise can also come from a broken seat and a worn shaft.

Of course, the generator can also make noise due to a short circuit.

The timing belt may hum, and the owner may think it is a generator. In this case, you need to remove the belt and listen - if the noise disappears, then it was the belt.

For many Russian drivers, the generator begins to hum after heavy rain. This means that water gets inside the unit, and until you disassemble the element and clean everything inside, nothing will help.

And of course, a relay or integral. Brushes cost pennies, so to check, it is advisable to change them first. Then listen to see if there is a hum.

Thus, the generator can hum for various reasons, but the most common are: bearing failure, a short circuit in the diode bridge, or a wire falling off.

Forget about fines from cameras! An absolutely legal new product - Traffic Police Camera Jammer, hides your license plates from the cameras that are installed in all cities. More details at the link.

Absolutely legal (Article 12.2);
Hides from photo and video recording;
Suitable for all cars;
Works through the cigarette lighter connector;
Does not cause interference to radios and cell phones.

The generator hums like a transformer when the Prior's ignition is turned off

vovkas, Find out from what specific place the sound comes from.
Webasto has a control unit. if it jams, it will drain the battery to full.

Such a constant quiet hum. audible when the engine is turned off?

The same thing happened to me in October. It’s easy to check, remove the fender liner from the left front wheel and turn off the power to the Webasta

vovkas, Find out from what specific place the sound comes from.

Webasto has a control unit. if it jams, it will drain the battery to full.

Such a constant quiet hum. audible when the engine is turned off?

The same thing happened to me in October. It’s easy to check, remove the fender liner from the left front wheel and turn off the power to the Webasta

This is very similar to the truth! Webasta was blocked when I bought the car - maybe because of this buzzing? I just unlocked it on Friday! Sound from the front left pillar below. How did you treat it? In winter, you can't do well without a webast.

In winter, without Webasta, it’s complete Achtung.

I took it to a service center and they determined that the control unit was damaged. a new one cost 16 thousand rubles. and wait a couple of days, so I went to the disassembly site and bought a used one. Webastu assembled on the same day for 14 thousand rubles. . installed, introduced, registered. Everything is okay.

If you are going to remove it, pay attention to the Webasto catalog number (you can see it when you remove the fender liner) and look for exactly the same one :hi:

No, Webasto is turning off! There is no smoke, everything seems to be turned off, only the standard alarm light is blinking. And a hum, quite intelligible, either from the tidy or from the hood.