Replacing the inner and outer CV joints of VAZ 2108, 2109, 21099

If crunching and knocking noises appear in the front part of the car, the CV joint on the VAZ 21099 needs to be replaced. They are especially pronounced when driving over uneven places and on turns. Many car enthusiasts immediately head towards a car service center, but you can replace the CV joint on a VAZ 21099 with your own hands, without resorting to the help of specialists. In this situation, it is better not to leave the solution to the problem for later, so as not to lead to a disastrous result.

If you notice noise in the front of the car, you should immediately start checking the CV joint boots. Perhaps this is precisely the problem - there may be cracks, traces of grease, or even become unusable, namely, torn. To check, turn the steering wheel all the way to the side at your discretion and look at the area under the wheel.

If you find damaged areas on the dust cover, you must immediately replace it with a new one, otherwise it will become clogged with water, stones, dust and others, which will lead to its inapplicability. And when driving around corners, a knocking noise may occur, which indicates faulty joints. To check them, it is worth rocking the drive shaft - this is to check for the presence of play.

Replacing CV joints: practical recommendations

On the advice of specialists, the CV joint should be completely replaced. An exception may be anthers or other small elements of this type. In addition to lubrication, all the clamps in the CV joint must also be replaced with new ones, and during assembly, monitor the cleanliness of the work to prevent dirt particles from getting into the hinges.

To install the CV joint in place, it is better to use a hammer and a wooden spacer, watching your movements so that they are not strong and not sharp. Those. Simply place the spacer and tap it until the part snaps into place. If you neglect this and hit the part itself, you will simply damage it.

Once the hinge is in place, its boot is installed. First of all, the clamp is clamped onto the shaft using pliers. In this case, you will need to equalize the pressure in the part; to do this, just use a screwdriver to pick up the edge of the boot and unscrew it. After this, the clamp is clamped from the outside. The plastic plug must be installed at the end of the shaft, not forgetting about it. The remaining steps are performed in the reverse order in the same way as the CV joints were removed before.

Installing new hinges

And the final stage remains - installing new hinges on the drive. You already know almost everything about how to change a grenade on a VAZ-2109. All that remains is to install a new element.

First, wash the shaft, get rid of dust and lubricant residues, then put on a new boot. Next, perform the following manipulations:

Install a new retaining ring.
Carefully, trying not to damage it, place the grenade on the shaft. To make it sit down, you need to apply several sharp blows through the wood spacer.
Apply lubricant under the boot and on the inside of the hinge. By the way, the kit comes with a small amount, it is recommended to add a little more.
Secure the boot with two clamps.

Once you have assembled the entire drive, you can begin installing it on the car. The work is done in reverse order. First put the inner CV joint in place, then the outer one.

Tighten the nut and secure it with a chisel. To prevent corrosion, you can apply a small amount of Litol to the nut and close it with a cap. Now you know how to change a grenade on a VAZ-2109 yourself. The procedure will not take much time, but you can save a lot of money. Workshops will charge about the same amount for repairs as a set of hinges costs (about 1,000 rubles).

Replacing the CV joint on a VAZ 2109, removing the drive

Despite the vulnerability of the rubber boots of the drives, it is often enough to replace them, while simultaneously washing the “grenade” with gasoline and adding a new portion of lubricant. Carrying out such repairs, with minor wear, allows you to do without replacing the drive.

Before starting work, you need to set the car to the handbrake and install wheel chocks.

First of all, you need to unscrew the hub nut using a socket and a suitable wrench. In this operation, it is necessary to remove the punching elements on the nut using a punch; this will allow the threads on the CV joint to be preserved during dismantling (the nut must be replaced with a new one).

An important point in this operation is to unscrew the nut (apply force) with the car wheels lowered to the ground, otherwise there is a risk of damaging the differential or other transmission elements.

Next, you need to jack up the car on the side needed for repair, after loosening the wheel nuts, and remove it.

At this stage, or earlier, it is necessary to drain the oil from the gearbox. The next task is to release the steering knuckle at the bottom from the ball joint by unscrewing two bolts securing it.

Since the hub nut is turned out and the ball joint is unscrewed from the steering knuckle, you can try to remove the splined part of the CV joint by pushing the brake disc and strut assembly towards you (it has sufficient travel, the main thing is to turn the steering wheel so that the tie rod end protrudes as much as possible).

Next, we remove the inner CV joint by prying it with a pry bar and pull out the drive

When you have pulled out the inner part, pay attention to the oil seal in the gearbox; if it was leaking before, it will have to be replaced.. In practice, replacing the outer CV joint of a VAZ 2109 is the most common drive repair

Since the internal drive operates at smaller angles and is less susceptible to damage to the boot, replacing the internal CV joint of the VAZ 2109 is quite rare.

In practice, replacing the outer CV joint of a VAZ 2109 is the most common drive repair. Since the internal drive operates at smaller angles and is less susceptible to damage to the boot, replacing the internal CV joint of the VAZ 2109 is quite rare.

Let's consider further actions that involve replacing the outer CV joint with a minimum number of operations. According to the repair rules, it is necessary to remove the entire drive and dismantle the CV joint in a vice, in a garage.

Attention! You cannot remove two drives from the gearbox at the same time, as the gears may move; dismantling occurs one at a time or a special insert is inserted instead of the hinge.

Signs of failure of the outer grenade (CV joint).

Most often, the outer CV joint of the VAZ-2109 is replaced, since its resource is approximately three times less than that of the internal one. But the repair algorithm is generally similar.

Even to install new boots, you will need to completely dismantle the drive - it’s much more convenient to work this way. To determine if grenades are damaged, you need to do the following:

Turn the steering wheel to the left all the way.
Drive away and listen for any extraneous sounds.
Turn the steering wheel to the right all the way, then drive off again and listen to the sounds.

If a characteristic crunch appears, you need to change the grenade. It is useless to repair it - these elements cannot be restored. If both CV joints are faulty - internal and external, then it will be easier to install a new drive assembly. At least there won't be any problems knocking down old grenades.

Unlike other cars, it is especially difficult for the VAZ-2109 to keep the grenade boot in working condition for a long period. The main reasons for its failure, first of all, can be unfavorable climatic and external factors. As a result, cracks will form on the parts, and further operation will be impossible.

There are two options here:

signs that your grenade has already broken,
signs that the grenade will soon come out and break.

Of course, the first sign of a malfunction of the external grenade is a crackling sound. If you hear a crackling noise while driving with the steering wheel turned, it is definitely a CV joint. The greater the angle of rotation of the wheel and the harder you press on the gas, the louder the clicks. Another sign that does not always appear is vibration on the steering wheel at speeds above 80 km/h. The vibration is only slightly similar to the vibration from an unbalanced wheel. It usually manifests itself as a slight twitching of the steering wheel.

If the CV joint breaks, the car will stop moving. In any gear engaged, press the gas, the speed increases, but the car does not move.

How to understand that it is the outer CV joint that has broken, and not the internal one or the clutch in general (the first signs of failure are similar to the signs of a clutch failure)? First of all, start the car and put it in any gear. Next, open the hood and look in turn at each of the shafts going from the box to the wheels (one short, the other long). If any shaft is spinning, it means that the CV joint has broken on this side.

The hinge components are made of high-quality materials, and the working surfaces have high-quality processing. Therefore, VAZ-2108 CV joints can work for a significant period without any intervention or maintenance of the unit itself.

But there is one caveat - the reliability of the unit is maintained only if there is no contamination. The ingress of sand and dust, which are abrasives, intensively wear out the working surfaces, which leads to the destruction of the hinge.

The assembly is protected from contamination by anthers - special rubber elements, fixed on the shaft with a clamp on one side, and on the outer race on the other.

But the resource of the anther is limited. Due to constant contact with the external environment, the rubber “ages”, which leads to the formation of cracks through which sand and dirt penetrate into the unit.

Diagnostics of the drive comes down to inspecting the anthers. If even minor cracks are detected, an immediate replacement of the CV joint boot 2108 is required. Additionally, the element is washed and fresh lubricant is added.

A sign that a VAZ-2108 CV joint needs to be replaced is the appearance of a pronounced crunch and clicking sound when turning the steering wheel. With slight wear, third-party sounds appear only at the extreme positions of the steering wheel, but as wear progresses, a crunching sound appears at lower turning angles.

At the initial stages, you can still try to extend the service life by washing, adding lubricant and replacing the boot. But we note that if a crunch appears, it means that the working surfaces have already begun to wear out, and these procedures will only delay the replacement of the unit, but in the end it will have to be done.

First of all, when driving, there may be extraneous noise from the front. First you need to make sure that the CV joint boots are not torn and there are no cracks or oily marks on the surface. To check, just turn the steering wheel all the way and carry out a visual inspection behind the wheel.

Found any damage? Change the boot immediately so that stones, small particles, and water do not subsequently get into the CV joint mechanism. Otherwise, the hinge will quickly become unusable.

It is quite easy to determine the need to replace the hinge itself - during turning maneuvers the driver notices characteristic knocking noises. The presence of play during swinging of the drive shaft will help confirm this fact.

Interior

Replacing the internal CV joint of a VAZ 2109 is carried out if the following parts and tools are available:

Vise;
A set of keys;
Hammer;
Jack.

First of all, completely remove the drive from the car and secure it in a vice. To remove the boot, you will need to remove the CV joint clamps. After this procedure is completed, you can begin to remove the part itself. Using a hammer, give the part a few firm blows to force it out of the mount. At the end of this part there is a plastic tip. It must be carefully removed for subsequent installation on a new “grenade”.

Before replacing, all fasteners, and the CV joint itself, must be lubricated with a special lubricant. Next, carefully put the new part back onto the drive. To do this, use a hammer and a wooden block so as not to damage the part.

Next comes the installation of the boot. It must be installed at a distance of approximately 20 mm from the “grenade”. After installation, secure with clamps.

Tools for repairs

The procedure for replacing VAZ grenades is quite simple, but you will have to suffer a little, since knocking the old element off the drive is problematic. You need these tools:

Set of sockets and keys. In particular, you will need a socket wrench or a “30” socket.
Jack (it is best to use a hydraulic one paired with a support).
Hammer.
Chisel. Before replacing the grenade on the VAZ-2109, it must be removed; to do this, you will need to loosen the nut.
Capacity 4-5 liters.
Puller for retaining rings.
Vise.

You will also need a new repair kit. It consists of a grenade, a locking ring, lubricant, a nut, a boot and two clamps.

How to independently determine problems with the constant velocity joint on the “nine”?

Lubrication Both types of hinges are structurally one unit, but the outer one breaks much more often due to high loads and rotation angles. Let's look at some signs of identifying a malfunction and ways to detect it:

when trying to move the wheel hub in different planes, play is felt;
when changing speed or starting off, the car moves jerkily;
with the steering wheel turned to the maximum, start moving - the faulty outer joint makes a certain crunching sound;
extraneous noise in straight-line motion indicates a problem with the internal joint.

Good diagnostic results are obtained by a technique that allows you to lift the car (at least jack it up). Here it is possible to rotate the wheel when the internal joint is maximally curved. It is in this way that you can hear the so-called hinge “crunch”, which allows us to speak with absolute certainty about the breakdown of the constant velocity joint.

What is a grenade?

A grenade is the colloquial name for a constant velocity joint, which allows motion to be transmitted from the vehicle's gearbox to the wheels. Pay attention to the design of the car's drive. From the gearbox, consisting of shafts and a differential, there are two rods, at the ends of which there are moving elements (CV joints). They allow movement to be transmitted to wheels that are lower than the differential axis.

It is with the help of movable hinges that it is possible to realize the rotation of the front wheels. Essentially, this is a kind of crosspiece that is installed on the cardan shafts. But the grenade is much stronger and more durable. Why a grenade? Yes, it’s just that this element is very similar to this projectile and nothing more. Consists of three parts - outer and inner cages, balls between them. A special lubricant is pressed inside.

Replacement

It is most convenient to carry out this work in an inspection hole. This way you can easily get to all the details. Put the car on the handbrake. Raise the car on a jack. Remove the wheel. Pre-moisten all threaded connections with penetrating lubricant. Now you can proceed directly to the replacement:

The nut securing the hub is unscrewed;
The ball joint is unscrewed and removed;
Move the shock absorber strut aside;
Remove the outer joint shank from the hub. For greater convenience, you can use a special puller;
The transmission oil (gearbox) is drained;
Using a hammer and a drift, knock out the hinge body (inner) from the gear (axle shaft);
Remove the drive.

Install a new thrust ring on the inside of the CV joint;
Center the position of the joint shank relative to the thrust ring.
Then everything is assembled in reverse order. Don't forget to fill the box with oil. There are no difficulties during work. Sometimes you have to tinker with the alignment, but this is a fairly rare occurrence.

Replacing the VAZ 2109 CV joint: is it necessary?

Having decided to replace the CV joint on your car, do not rush to proceed immediately; perhaps only minor repairs are required.

So, first of all, check the drive shaft play by simply shaking it by hand

Next, inspect the CV joint itself - turning the wheels completely to the right or left, look under the car, paying special attention to the boots. If you find cracks, traces of grease, ruptures or other violations of the integrity of the structure on them, be sure to replace the CV joint covers

After all, if this work is not done in a timely manner, it becomes necessary to replace the entire assembly. If in your case such a need has “ripened”, well, prepare the car.

Possible malfunctions

In common parlance, many VAZ owners call the unit in question a “grenade” - this is exactly what it looks like in appearance.

Most often, CV joints break after the boots are damaged. In this case, dirt, sand, etc. begin to get into them. Foreign particles quickly destroy the assembly, and, of course, it has to be replaced.

If a damaged boot is detected in a timely manner, then in most cases serious trouble can be avoided. After replacing it, all that remains is to wash the CV joint and return it to its place. When the problem remains out of sight of the VAZ car owner, then there is a high probability that the grenade will become unusable literally after 2-3 hundred kilometers.

Removing the drive, replacing the boot, CV joint

Next, we will consider how to replace the outer CV joint, and this will be a simplified version that does not require complete removal of the drive shaft.

The sequence of actions is as follows:

We put the car on the inspection hole, because it will be easier to do everything on it. We immobilize it with anti-recoil supports;
Immediately use a 30mm socket with a wrench to loosen the hub nut (drive mount). While the car is not jacked up, this is easier to do than when the wheel is removed. It is difficult to remove the nut because it is cored, so you will need to extend the wrench with a pipe;
We jack up the required wheel and remove it from the car;
Unscrew the fastening bolts of the ball joint of the lower arm to the wheel hub;
Use a puller to press out the tie rod end;
Completely unscrew the drive shaft mounting nut;
We take the brake disc with our hands and pull the shock absorber strut towards us, pulling the hub from the end of the outer CV joint;

And then we carry out work to replace the boot or hinge. This is where you should climb under the car. To remove the outer CV joint 2108, first disconnect the boot clamps (you can simply bite or cut them). We cut off the boot with a knife (even if it is whole, it is better to replace it with a new one).

Wipe the hinge with a rag to remove grease. We take the attachment, rest it against the end of the CV joint from the shaft side and strike it with a hammer. Moreover, they should not be strong, since it is only necessary to knock the inner race off the retaining ring mounted on the shaft.

If you plan to replace the boot, you should first wash the joint in kerosene to wash out all the dirt from it.

Signs of failure of the outer grenade (CV joint).

There are two options here:

signs that your grenade has already broken,
signs that the grenade will soon come out and break.

How to understand that a grenade will soon break.

How to understand that the outer CV joint has broken.

If the CV joint breaks, the car will stop moving. In any gear engaged, press the gas, the speed increases, but the car does not move.

I recommend not just visually looking at the shaft, but touching it with some long, hard object, such as a stick. The main thing is that there is nothing on it that can wrap around the shaft!!! When you touch the shaft with a stick, if it is spinning, you will feel a slight vibration. This is usually done in the dark, because it is difficult to understand whether a cylindrical object is spinning, especially in the dark.

How to remove the drive

In order to remove the drive assembly, you need to perform the following steps:

Completely unscrew the nut on the outer joint to free the hub.
Remove the nuts from the bolts that secure the strut to the hub steering knuckle. This will allow you to move the hub to free the joint. But it will be much more efficient not to unscrew the nuts on the strut, but to disconnect the ball joint.
If you unscrewed the ball joint, you need to remove the tie rod end pin from the hole in the strut knuckle. This is done using a special puller.
Now you need to pull the outer joint out of the hole in the hub. How to do this depends on the situation. You can use a thin drift, but without fanaticism, so as not to damage the mechanisms. You should also not hit the CV joint axle with a hammer - this will cause the edges to flatten and make it impossible to remove the element.
After you pull out the outer joint, you can proceed to the inner one - to remove it from the hole in the gearbox, just apply a few light blows with a small chisel. You can also use a mounting spatula.

That's all, now the drive has been completely removed, you also need to learn how to remove the CV joint on a VAZ-2109.

conclusions

You can talk endlessly about how to change joints correctly, what lubricant to use, which manufacturer you should trust. In fact, the most suitable components are those whose manufacturers supply them to the AvtoVAZ plant. When replacing the external CV joint of a VAZ-2109, preference should be given to the manufacturer who supplies them to the plant. As practice shows, the service life of these elements turns out to be higher than that of foreign analogues. No matter how much they scold our auto industry, the reliability of domestic units is an order of magnitude higher than the vaunted German or Italian ones.

Basic procedure

First of all, you should put the car on the parking brake and secure the rear wheels with blocks. After this, while the car is on the ground, the hub nut is loosened. You will first need to remove the protective cap. It should also be taken into account that this nut is tightened quite tightly, so you will have to make a significant effort. At this point you can loosen the wheel bolts.

Next, you need to raise the front of the car by placing the body on supports. After this, you can unscrew the wheel bolts completely, removing the wheels, and remove the hub nut stop washer. The next step is to disassemble the steering rod, or rather its tip. The fastening bolts of the lower part of the steering knuckle support are screwed together, after which it is necessary to turn the steering wheel in the direction from which the replacement is being made until the extreme position is reached.

Next, the spitz end of the outer CV joint of the VAZ 2109 is pulled out from the hub, after the steering knuckle and strut have been pulled out. The next step is to press out the inner CV joint secured in the gearbox, for which it is better to use a pry bar.

It is important to pay attention to the fact that if it is necessary to carry out work on all CV joints, it is recommended that after removing one drive, install a retainer in the box, which can be an old similar part of the inner CV joint. Otherwise, the gears will shift, due to which the CV joints will not be able to be installed in place

If traces of oil were observed in the area of the gearbox during operation of the vehicle, then the seals on the CV joints will also need to be changed. Next, you need to clamp the drive shaft with a vice, remove the clamps from the hinges and unscrew the boots if they are intact. It is enough to cut off torn anthers with a knife.

The CV joints are knocked off the shaft with a hammer and drift, with the main forces being applied to the hinge cage. The same is done for the outer CV joint.

If you only need to replace the anthers, then the joint should be washed with gasoline to get rid of old grease and traces of dirt.

The new boot is placed on the shaft, but it is important to keep in mind that the right shaft is longer than the left. In addition, it is better to immediately replace the lubricant in the CV joint, making sure there is enough of it

How to remove a vaz shruz

Having determined that it is the external grenade that is broken, we begin to remove it.

How to unscrew the hub nut on a VAZ?

First of all, unscrew the hub nut. To do this, take a 30mm head and a lever, the larger the better. We put bricks under the wheels to prevent the car from rolling (simply putting it in gear is not an option, the wheel will spin) and begin to unscrew the hub nut.

In this matter, the more you weigh, the better, since I very often lacked my weight and leverage of about one and a half meters. I got out of the situation in the following way: I stood completely on the lever, as close to the edge as possible, thereby giving maximum tension to the nut, and hit the lever with a hammer. Usually this method helped me unscrew even the most soured wheel nuts.

One more nuance: if the outer walls of the head come into contact with the walls of the hub, it is better to lubricate the head with mining or lithol, or, in extreme cases, with silicone grease. Thanks to this trick, the head will not bite in the hub.

How to remove a grenade?

The hub nut is unscrewed, now we remove the wheel, unscrew the two bolts that hold the ball joint, disconnect the suspension arm and the hub, move it to the side of the car while lightly tapping the grenade, remove it from the hub. At this point, two options are possible:

The grenade is already broken.
Replacing the grenade due to its crunching sound.

In the first case, you simply remove the outer part of the CV joint from the shaft, then the retaining ring from the drive shaft and knock off the cage with a hammer.

In the second case, removing the CV joint becomes more difficult. You need to deflect the grenade relative to the shaft at the maximum angle so that the bearing balls and their cage are visible.

Now use a hammer to break the jumpers of the cage between the bearing balls and take out the balls one by one. When you take out the last ball, you can remove the body of the grenade, and then its inner part sitting on the shaft, after first removing the locking ring from the shaft.

Of course, you can simply try to knock the grenade off the shaft, but due to the locking ring this will be problematic.

That's it, the CV joint is completely removed. Now let's start installing the new part.

Jack;
Wheel bolt wrench;
Power wrench;
Ratchet driver;
Steering and ball pin remover;
Head at seventeen, thirty;
Magnet;
Hammer;
Oil collection container;
Mounting lever;
Vise;
Slotted screwdriver;
Dull wire cutters;
Engine cleaner in aerosol;
The extension is sharpened to a cone;
Torque wrench.

Loosen the wheel bolts, jack up and remove the wheel.
Remove the cap and unscrew the hub nut using a 30 mm socket. When unscrewing the nut, ask an assistant to press the brake pedal. You can also remove the nut while the car is on its wheels.

Use a magnet to remove the washer that is placed behind the hub nut.
Unscrew the nut securing the steering joint to the shock absorber. Head nut for seventeen. Use a puller to squeeze your finger out of your ear. If you don’t have a puller, you can hit the end of the eye where the finger is inserted several times with a hammer. Unscrew the two bolts securing the ball joint to the steering knuckle and move it to the side.

Remove the outer grenade from the splined part of the wheel bearing.

Place a container to collect the oil and remove the internal grenade from the manual transmission. To remove the grenade, insert the mounting lever into the cut in the drive housing and manual transmission. Next, tap the lever with a hammer until the grenade moves.

Pull the inner grenade out of the box and remove the drive shaft.

Remove the boot from the grenade by opening the clamps in advance. The clamps can be opened with a slotted screwdriver.

Grab the slotted part of the grenade with one hand and use a hammer to hit the outer body of the grenade with the other hand. After two or three hits the grenade will be in your hand.

Remove the old boot from the shaft and clean the spline part of the old grease. Fill the new CV joint with grease and, if necessary, replace the retaining ring on the shaft. Place the boot on the shaft with the narrow side facing inward.

Drive design features

The main advantage of CV joints, in comparison with conventional joints, is the transmission of rotation without loss, even with a strong change in the angle between the components of the shaft (up to 70 degrees).

In total, the VAZ-2108 drive shaft includes three components:

Shaft (with connecting splines);
Internal CV joint (for interaction with the box);
The hinge is external (provides interaction with the wheel hub).

Both hinges used on the VAZ-2108 are of the ball type; they are almost identical in design, but differ in size. Thus, the outer ring of the internal element has a significantly greater depth. This provides the possibility of axial displacement of the inner race, and as a result, a change in the length of the shaft, which is necessary for the drive wheels to make turns. In addition, the left and right drive shaft assemblies are different lengths.

The main components of the CV joint are:

Outer ring (made in the form of a glass, special grooves are made on the inner surface);
Inner race (represents a power fist, which also has grooves);
Balloons;
Separator (prevents balls from falling out);

All this is assembled into a single structure, so it is generally impossible to check the VAZ-2108 CV joint, even if it is completely disassembled.

The inner races are connected to the shaft using splines. They are secured against removal with locking rings.

The outer races are made integral with the limit switches, which are splined into the gearbox and hub. But the end stop of the inner CV joint is secured in the box with a retaining ring, but the outer joint is secured with a threaded connection (nut).

Assembly of the unit

The assembly process for the outer CV joint is as follows:

We stretch a new rubber element onto the shaft;
We place a washed or new CV joint on the shaft splines (if it is also being changed), and then we stuff it so that the groove in the joint cage fits onto the locking ring, which will ensure fixation from removal;
We add new lubricant (press it into the hinge itself, as well as into the boot);
We pull the boot onto the outer casing;
Use your hand to press the boot a little to squeeze out the air from inside;
We put on the clamps and fix everything.

After this, the drive is installed back - the hub is put on the splines of the limit switch and the whole thing is secured with a nut. Next, put the rod end, support and wheel in place.

After removing the car from the jack, tighten the drive fastening nut and using a powerful screwdriver, it is cored (its skirt is bent into the groove on the shaft) to prevent spontaneous loosening.

Preparatory work

Before replacing the CV joint boot or the grenade itself, you need to perform several preparatory steps. Without this, withdrawal is impossible

Please note that you cannot remove both inner joints at the same time - this will lead to destruction of the differential mechanism

If the bevel gears fall off, you will have to remove the gearbox and completely disassemble it. Preparation includes the following steps:

Complete or partial drainage of oil from the gearbox. When removing the internal CV joints, oil will spill out; to prevent this from happening, it is necessary to drain at least 2/3 of the total volume.
Unlocking the front wheel hub nut (or both, if two drives need to be repaired).
Loosening the hub nut and wheel bolts. The hub must be unscrewed using a 30mm wrench with a large lever.
Removing the wheel after installing the side to be repaired on the jack and support.

Having completed the preparatory work, you can begin directly replacing the VAZ-2109 CV joint.

Types of CV joints

Before you begin repairs, you need to find out exactly how the unit is designed.

The pair of drives on the VAZ 2109 is equipped with a total of 4 CV joints.

CV joint type	Peculiarities
Interior	There are 2 of them. They transmit torque to the axle shaft from the gearbox
Outer	There are also two of them. Installed on the ends of the axle shafts and transmit torque directly to the wheels

This arrangement of grenades allows the wheels to rotate during turns and constant operation of the suspension system. To put it simply, the outer CV joints are responsible for transmitting torque when cornering, and the inner ones are responsible for the vertical movement of the wheels. These are collisions with bumps, holes, roll in turns, etc.

Replacing anthers and hinges

Often, problems with CV joints occur due to damage to the anthers. In this case, you can get by by replacing these protective parts. It will cost much less than replacing the entire CV joint. To do this work, remove the drive and secure it in a vice. Replacement is done as follows:

Remove the clamps from the boot. Using pliers, remove the old boot. If there is no need to dismantle the grenade (hinge), then you can install a new part and secure it with clamps;

If there is a need to dismantle the hinges, you will need to remove the old ones. This is done with a hammer. The blows should be applied through a wooden drift; You need to take a plastic tip from the removed CV joint. It will then need to be installed on a replacement part; Be sure to fill the new grenade with lubricant, this will extend its service life. Carefully hammer the CV joint into place through a wooden block. Do not harm him; Place the boot on the hinge

At the same time, pay attention to the distance from the beginning of the grenade to the end of the boot should not be less than 21 centimeters; We carefully tighten the clamps on the boot, the service life of the CV joint depends on this.

Pay attention to the need to select hinges. They must be from the same set

Otherwise, they will not work for very long, and with some interruptions. Conclusion. Domestic cars for the most part cannot boast of increased reliability. That is why replacing the CV joint on VAZ 2109 and 21099 is familiar to many drivers. This is not a tricky thing, no special skills are required

But it is important to do everything as carefully as possible. This can significantly extend the service life of the part.

Causes and breakdowns

In reality, the resource of the CV joint turns out to be significantly less, which is caused by operating conditions, poor quality of roads, driving habits and other factors.

The CV joint is popularly called a “grenade,” which is due to the external similarity of the element to this explosive device.

Here's what you should know about grenade malfunctions:

Practice shows that the most common cause of CV joint failure is dirt, dust, and sand that enter the mechanism through a damaged boot;
Sometimes the problem of a non-functioning grenade can be solved by replacing the boot. This is possible if the CV joint itself has not yet worn out due to exposure to contamination;
If the damaged boot is not detected in time, the grenade will be completely worn out within literally 200 kilometers;
If the CV joint fails, a strong crunching sound appears when cornering and accelerating. Such a symptom indicates the need to urgently replace the CV joint;
The cost of new grenades is quite affordable; they are available at any auto parts store. But you should purchase those that meet the technical requirements of the VAZ 2109;
If you have at least a little experience in repairing cars yourself, it is quite possible to replace a grenade with your own hands.