How to check the tension of the VAZ 2107 generator belt

How to replace the VAZ-2107 injector alternator belt

The belt is necessary to connect the generator and crankshaft pulleys, and on front-wheel drive classic models, the water pump pulley also takes part in the connection.
It is not so difficult to independently replace a torn or stretched alternator belt in a VAZ-2107 with an injector-type engine that has an additional carburetor. For this you will need:

• a mounting spatula, which can be replaced with a crowbar or a strong flat stick;
• wrenches 17 and 19.

This is quite enough to carry out repairs. Of course, if you at least have an idea where this very belt is located.

Reasons for the break

1. 1. Exhausted resource. The belt needs to be changed at 50-60 thousand kilometers, but many do not do this;
2. 2. Defective product. The manufacturer may produce low-quality goods;
3. 3. Failed tension rollers, shafts and pulleys;
4. 4. Incorrectly selected belt tension level.

1. 1. Lack of teeth. If there are no teeth, the product cannot engage on rollers, pulleys and shafts;
2. 2. External modifications. If cracks, chips, stretching and other defects are noticed, urgent replacement is needed.

If you hear a whistle from the engine compartment when the radio, fog lights, regular headlights, etc. are on, then most likely it’s time to change the belt. Often, the whistling is eliminated if you tighten it, or vice versa, loosen the product a little. If the generator malfunctions, the “Check engine” indicator or, literally translated, “engine malfunction”, lights up on the instrument panel of the VAZ 2107.

If the belt breaks, it will not immediately become clear that it is broken, since the car’s electronics will be powered by battery energy. To prevent this, you need to monitor the condition of the product and, if necessary, try it on.

In what situations is replacement necessary?

Wear of the element is characterized by such manifestations as cracks or tears in the blade, worn teeth and uneven edges. If you ignore such a deplorable state of a very important element, it will come back to haunt you with overheating and boiling of the engine, independent operation of the battery, which will lead to its rapid discharge.

If the belt is severely worn, it also shows signs of noise to the owner - it begins to whistle, especially at low speeds. Another reason for a whistling belt may be moisture getting on its surface, which occurs due to worn-out pipes of the cooling system - antifreeze begins to leak.

Some belts - oak - whistle when the car is started in frosty weather, and after warming up the sound disappears. A weak tension is expressed by a whistle, but in this case it is enough to simply tighten it.

Tension adjustment

1. 1. Loosen the generator;
2. 2. Unscrew the bolt on the bar;
3. 3. Find a position so that the product is not overtightened. If the tension is incorrect, a breakage is possible;
4. 4. Tighten loose bolts and nuts.

The electronic filling of the VAZ 2107 injector is important, and since the generator is responsible for its performance, you should not neglect replacing the belt. Timely replacement will help avoid product breakage. It needs to be checked every 15 thousand kilometers.

DIY belt replacement process

To remove the belt, you will need access not only to the upper front part of the car, but also to the lower one.
Therefore, if a crankcase protection is installed, you will need to remove it. Some craftsmen, for convenience, to facilitate access to the belt, also remove the battery. Once you have access to the required element, inspect it. If there is no visually visible damage to the canvas, just check the tension, it may have weakened. This is easy to do, just press the belt with your fingers, simulating a pressure of approximately 10 kg, and by the distance of deflection you can determine whether the element is in acceptable tone. The maximum standards in a narrower place are 10-15 mm, and in those where the space between the pulleys is wider - 12-17 mm.

Replacement

• New product;
• Set of open-end wrenches;

Replacement process:

1. 1. Make sure that the generator has free access from both above and below. If the car is equipped with crankcase protection, remove it;
2. 2. Remove or simply disconnect the battery terminals;
3. 3. Unscrew the nut of the upper mounting of the generator;
4. 4. Unscrew the tension roller nut. There is no need to unscrew it completely, but only until the belt calmly comes out from under the shafts, rollers and pulleys;
5. 5. Remove the old belt;
6. 6. Install a new product;
7. 7. Pull it so that the product does not rotate more than 15 millimeters.

If the condition of the belt is still good, then there is no need to change it, just tighten it. This procedure on a VAZ 2107 car is carried out in an elementary way, since getting to the right place is not difficult.

How to replace the generator on a VAZ 2107

Replacing a generator set is required in cases where the device no longer produces the required amount of current for consumer systems. The most common reasons for replacing an installation are the following malfunctions and breakdowns:

• burnt winding;
• interturn short circuit;
• deformation of the generator housing;
• resource development.

It is almost always easier and more profitable to replace the generator with a new one than to repair it.

Tool preparation

To dismantle and subsequently install the generator on a VAZ 2107, you will need a standard set of tools, which every driver usually has in his garage:

• wrench 10;
• wrench 17;
• wrench 19;
• a pry bar or a special shovel for installation work.

No other devices or devices are required.

Dismantling works

It is recommended to remove the generator from the “seven” after the engine has cooled down. It is not recommended to work with vehicle components immediately after driving due to high temperatures and the risk of injury.

Immediately before removing the generator, you will need to remove the right front wheel, since the installation can only be reached from under the bottom of the car through the right fender.

It is imperative to securely fix the position of the car with a jack and auxiliary devices (hemp, stands) in order to eliminate the risk of the car falling during operation.

The progress of work comes down to the sequential implementation of the following actions:

1. Find the generator housing in the mechanical structure of the car, feel for the bar that secures it to the engine.
2. Using a wrench, unscrew the fastening nut halfway.
3. Unscrew the nut on the bracket, but do not remove it from the stud.
4. The generator housing can be pulled and moved in any direction - this will become possible due to the loose fastening.
5. Remove the belt from the landing pulleys and remove it from the work area.
6. Disconnect all incoming wires to the generator housing.
7. Unscrew the fastening nuts completely.
8. Pull the generator towards you and remove it from under the body.

Photo gallery: main stages of work

Immediately after dismantling work, you should inspect the generator landing site. All joints and fastenings must be cleaned of dirt and, if necessary, treated with acetone.

Accordingly, installation of the new generator will need to be carried out in the reverse order, paying special attention to tensioning the new belt.

Video: instructions for replacing the generator on a VAZ 2107

HOW TO CORRECTLY TENSION THE BELT ON THE GENERATOR

When installing a generator on a VAZ 2107 yourself, the most difficult moment is considered to be proper belt tension. After all, it is through the belt that the generator mechanism will be launched, therefore, any errors and miscalculations when tensioning the rubber product will affect the performance of the car.

The belt tension is performed as follows:

• Place the new generator in its regular place, placing it on the studs.
• Tighten the fixing nuts only halfway, without over-tightening.
• Use a pry bar to install into the gap formed between the generator wall and the pump. Secure the mount in this position.
• Place the new belt on the alternator pulley.
• Hold the pry bar and begin tensioning the belt.
• Tighten the fixing nut in the upper part of the mounting of the generator unit housing.
• Afterwards, carry out a preliminary diagnosis of the degree of tension - the rubber product should not sag downward much.
• Tighten the lower stud nut until it ends without overtightening.

The diagram shows places for tension quality checks

Next, the quality of the belt tension is checked. Using two fingers, press firmly on the free part of the belt and measure the existing deflection. Normal sagging should not be more than 1.5 centimeters.

The service life of a typical belt for a VAZ 2107 generator is usually 80 thousand kilometers. However, it is recommended to change the belt drive earlier if the generator set is being replaced.

Thus, the generator on the “seven” can be replaced with your own hands, but you must adhere to strict rules and observe safety precautions. If you have problems with the operation of the motor after replacing the device yourself, it is better to contact a professional.

If you have any difficulties or problems, you can contact a certified specialist who will definitely help!

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Replacement

• New product;
• Set of open-end wrenches;

Replacement process:

1. 1. Make sure that the generator has free access from both above and below. If the car is equipped with crankcase protection, remove it;
2. 2. Remove or simply disconnect the battery terminals;
3. 3. Unscrew the nut of the upper mounting of the generator;
4. 4. Unscrew the tension roller nut. There is no need to unscrew it completely, but only until the belt calmly comes out from under the shafts, rollers and pulleys;
5. 5. Remove the old belt;
6. 6. Install a new product;
7. 7. Pull it so that the product does not rotate more than 15 millimeters.

If the condition of the belt is still good, then there is no need to change it, just tighten it. This procedure on a VAZ 2107 car is carried out in an elementary way, since getting to the right place is not difficult.

Reasons for the break

1. 1. Exhausted resource. The belt needs to be changed at 50-60 thousand kilometers, but many do not do this;
2. 2. Defective product. The manufacturer may produce low-quality goods;
3. 3. Failed tension rollers, shafts and pulleys;
4. 4. Incorrectly selected belt tension level.

1. 1. Lack of teeth. If there are no teeth, the product cannot engage on rollers, pulleys and shafts;
2. 2. External modifications. If cracks, chips, stretching and other defects are noticed, urgent replacement is needed.

If you hear a whistle from the engine compartment when the radio, fog lights, regular headlights, etc. are on, then most likely it’s time to change the belt. Often, the whistling is eliminated if you tighten it, or vice versa, loosen the product a little. If the generator malfunctions, the “Check engine” indicator or, literally translated, “engine malfunction”, lights up on the instrument panel of the VAZ 2107.

If the belt breaks, it will not immediately become clear that it is broken, since the car’s electronics will be powered by battery energy. To prevent this, you need to monitor the condition of the product and, if necessary, try it on.

The need to replace the belt

Initially, it is important to note that the generator and its drive on a VAZ 2107 car, both injection and carburetor, are absolutely similar. The only difference between an injector and a carburetor is that the injector is equipped with a crankshaft position sensor. When it is necessary to replace the alternator belt on an injection-type VAZ 2107, this sensor must be removed.

During the operation of the VAZ-2107 car, the part in question wears out. The need to replace an element can be determined by the following signs:

• the appearance of cracks;
• whistling when starting the engine, or when sharply pressing the gas pedal, or after driving through a puddle;
• disheveled;
• sagging.

It is important to know! If the alternator belt breaks on a VAZ 21074, the engine will quickly heat up, which can lead to boiling. The battery remains without recharging, so after a short period of time it will run out.

The device in question, unless of course it is a defect, has a certain resource during normal operation of the vehicle. This resource is usually 50-60 thousand kilometers, after which the belt should in any case be changed. How to do this not only correctly, but also quickly, we will consider in the material.

Changing the belt on a VAZ 2101-VAZ 2107

Removal

It is necessary to have access to the top and bottom of the car. If you have a crankcase protection installed at the bottom, then you will have to remove it accordingly; read the details in the article: “Replacing the crankcase protection on a VAZ.”

Note! Removing the battery will make the belt easier to access. The process is described in the article: “Replacing the battery in cars.”

Evaluate the appearance of the belt. If the condition is good, check the tension and tighten it if necessary. It’s easy to check: press the belt with your fingers with a force of 10 kg anywhere. Either in place “A” the distance by which the belt should bend will be 10-15 mm, or in place “B” 12-17 mm (see picture).