Replacing the outer and inner CV joint boot

In what cases is it necessary to change the CV joint boot?

The boot can be damaged for various reasons:

aging of rubber and the appearance of fatigue cracks on it;
foreign objects entering the surface of a rapidly rotating cover that break or cut through its material;
chemical corrosion of the boot due to the use of poor-quality lubricant;
wear and tear due to violation of installation rules;
cutting through the material with clamps that are too tightly tightened.

In addition, sometimes it makes sense to replace the cover for preventive purposes, for example, if the drive has been removed, which is quite a difficult task. It is advisable to combine the procedure with washing the hinge and putting fresh lubricant into it. This will significantly extend the life of the parts.

Checking the condition of the anthers

To check the condition of the rubber boot, it is necessary to inspect the surface of the part by turning the drive shaft. The search for the damaged part is carried out on a lift or with the wheel removed; a flashlight or portable lamp is used to improve visibility.

No breaks or tears are allowed on the surface; for additional checking, it is recommended to feel the surface of the cover with your hand. If there is grease on the surface of the boot, then it is necessary to understand the cause of the oiling.

Which one is better to choose anther?

When choosing a part, you should focus on the manufacturer and the material from which the case is made.

The quality of a product is usually clearly dependent on its price, unless, of course, it has been verified by several suppliers.

Some of the best and most widespread manufacturers in the spare parts markets are the brands GKN (Loebro, Spidan), Maruichi , SKF . They are also the most expensive, which indicates the best materials used. Such boots will never suddenly break, will last a long time, are very durable, and the repair kits contain everything you need, including high-quality specialized lubricant in the right quantity.

Cost of anthers

The price range is quite wide: from approximately 150 to 1000 rubles. and higher. It all depends on the make of the car and the manufacturer of the part. Non-original spare parts are cheaper. However, it also happens that the cost is unreasonably high: for example, because of the brand. Thus, the price of covers for a Toyota Land Cruiser reaches 8,000 rubles. The same can be said about other prestigious car brands. But not all car owners are eager to pay that kind of money for essentially an ordinary rubber band, albeit of high quality. Therefore, many simply select covers from other cars that are suitable in size and cost.

Causes of boot rupture:

constant driving through water and mud;
high torsional load (regular sharp turns);
careless (unprofessional) repair of suspension parts.

Procedure for replacing the outer CV joint boot

To replace the boot, the hinge will have to be removed from the drive shaft.

There are “unfastening” designs of repair covers, but they are unreliable and not very common.

the machine is installed on a jack and a safety stand; first, for convenience, it is better to loosen the wheel and hub nuts if you do not have inertial electric or pneumatic tools;
the wheel is removed and the hub nut is unscrewed;
the attachment of the steering knuckle to the suspension arm is disconnected, after which the drive splines can be removed from the connection with the hub.

You can proceed further in two ways, with varying degrees of convenience and speed of execution.

With hinge removed

You can remove the complete drive from the gearbox or gearbox, place it comfortably on a workbench and continue to work more confidently. But additional operations and the ability to avoid them if you have skills or devices allow you not to do this.

If it is nevertheless decided to remove the drive, then it must be pulled out of engagement with the differential side gear, which is not always easy due to possible deformations of the retaining ring, after draining some of the oil from the box. In addition, it is strictly forbidden to pull on the shaft, this will only destroy the internal hinge.

The drive is removed by striking along the inner hinge into its outer cage. Or by placing a suitable knob in the same place, sometimes with a specially turned curly end.

The outer CV joint is removed from the removed drive, blows are applied along the shaft into its inner race. After this, all that remains is to remove the remnants of the cover, wash the parts, lubricate and install a new cover in the grooves provided for it on the CV shaft and body.

Clamp locks can have different designs; sometimes you will need special pliers to install and tighten them correctly.

Without removing the axle shaft

The operations are the same, but you have to work under the machine, which does not add convenience. The main problem may be the outer “grenade” being knocked off the splines, because in this position it is very difficult to hold the shaft so that the inner one does not jump out of the box, dousing everything around with transmission oil.

But experienced craftsmen cope, usually working together, one holds the shaft, the second strikes.

You can use devices to remove the CV joint, but its feasibility is debatable. In severe cases it does not help, but in simple CV joints it comes off with one or two blows.

Diagnostic features

You can inspect the mechanism and identify damage to the boot yourself, using a jack and supports. First you need to lift the car and put it on special supports. To ensure stability, the car needs to be rocked slightly. The wheel is then rotated to the side to gain access to the boot, first on one side and then on the other.

Diagnostics of the CV joint boot

If there are tears or deformations, the rubber elements must be replaced. The anthers are changed, as are the brake pads, on both sides at once. It is advisable to carry out diagnostics regularly to eliminate the possibility of hinge failure.

Inspection of the CV joint boot

How to replace the inner joint cover

If there is no need to remove and disassemble the inner CV joint, then with the outer one removed, it is enough to pull the boot through the shaft and install a new one in the reverse order, so it is advisable to change both boots, no matter which one is torn.

When installing a new cover, it is necessary to control the distance at which the small clamp will be installed, otherwise the boot will be excessively compressed or stretched during operation due to the horizontal movement in the hinge.

How to identify the problem

To avoid this problem, it is necessary to inspect the CV joint boots at least once every five thousand kilometers. It is better to do this from a pit or on a lift to carefully inspect the corrugated rubber. If you suspect damage to the material or the appearance of deep cracks, you need to clean it and carefully inspect this place. If the suspicion is confirmed, it is necessary to replace the torn boot; it cannot be repaired. At the same time, the hinge is thoroughly cleaned and new lubricant is added to it.

Another sign of a ruptured boot is a CV joint crunching when turning when the load on it increases. In this case, the insides of the grenade may simply disintegrate, it will jam and fail. Then it will have to be changed, which will cost much more. In the most severe case, the needles of the bearings of the internal grenade get into the gearbox housing and disable it. And the reason for this is often the destruction of the outer boot.

Video: Replacing the outer boot of a VAZ 21099 grenade

What to do if the boot ruptures on the road

It is absolutely unacceptable to move with a torn boot. The hinge will not tolerate even the slightest contamination. Mixed with lubricant, these abrasives will quickly wear out its precision-made and polished grooves and render the CV joint unusable. But it is not always possible or willing to use a tow truck or carry out road repairs.

Temporary protection can be provided in a variety of ways, from wrapping the remaining boot with tape to cold vulcanizing holes and cracks.

Even a simple cloth wrapped and secured around the cover will help filter out dust. The main thing is to do this reliably and control the condition of the patch to the point of repair. And when replacing the cover, be sure to disassemble the hinge, rinse it thoroughly and fill it with new grease as required.

Dust will definitely get there, even if it is not visible. During operation, the temperature of the unit changes; it literally works like a pump for dirty air under the car. It is easy to check the tightness by simply squeezing the case with your hand. You can also check the condition in doubtful cases of the presence of surface cracks, although usually the problem area is immediately noticeable by the grease protruding outward.

What to do if the boot ruptures on the road?

If the boot ruptures on the road, it is necessary to jack up the car body, and then remove the old lubricant through the hole and introduce a portion of fresh substance. The damaged area is covered with a plastic bag or wrapped with insulating tape or stationery tape. Such protection is designed for a range of up to 500 km on dry roads. If driving in wet weather, it is recommended to check the condition of the package every 30-40 km, since dirt getting into the lubricant leads to accelerated wear of the hinge.

How to check the condition of the outer CV joint?

Front-wheel drive requires inspections every 2-3 thousand kilometers, as well as after driving over rough terrain, fine gravel surfaces, and forest roads. During such checks, the condition of the anthers is monitored, which may tear due to stones or branches, or collision with obstacles. To evaluate the hinges themselves, the front part of the car is placed on special stands to hang the wheels, then all the elements of the CV joint are inspected.

Popular brands:

Audi Q7, BMW M5, Chevrolet Astra, Hyundai Getz

They control the integrity of parts, the absence of drips, and the characteristic crunch when turning the wheels. To check while driving, use a jack to raise the car, then turn the steering wheel completely left/right, start the engine and engage the gear. If the front wheel drive operates with extraneous sounds, then the element needs to be replaced.

How to change the boot?

Before changing the outer CV joint boot, you need to remove the joint itself from the drive. At the service center, technicians use a special device to cope with such work without removing the “grenade”. “Knocking down” a hinge is not at all easy - regardless of the make of the car and how long it has been in use.

The replacement procedure boils down to dismantling the clamps and old boot, removing contaminants, and installing new protection. To quickly remove a worn or damaged cover, simply cut it and knock off the fastenings. After installing the new boot, carefully check that there are no gaps in the places of fixation on the shaft.

What is a CV joint

The CV joint is a very important part of the steering mechanism, the decoding of the abbreviation is simple - a joint of equal velocity angles, and the common people are better known as a “grenade”. They call it that because it looks similar in shape.

The main task of the CV joint is to transmit torque to the wheels of the car. The structure of the part is very simple and consists of six parts: the drive shaft, the boot, the retaining ring, the inner race, the housing with the outer race and the bearing.

CV joint repair

As mentioned above, the hinge cannot be repaired. Conventionally, one of the repair measures includes washing the “grenade” after driving with a damaged boot.

Washing is carried out at the same time when the damaged boot on the pomegranate is replaced. The hinge is carefully knocked off the shaft, inspected for damage and thoroughly washed to remove any dirt and grease in gasoline or kerosene.

After washing, the assembly is filled with lubricant and mounted in place, having previously installed the boot. The procedure makes sense only if there are no obvious signs of a joint malfunction.

A crunchy or knocking part definitely needs to be replaced, since wear forms on the working surfaces of the inner race, and it is no longer possible to stop the destruction. Continued operation of the vehicle may be dangerous for the driver and other road users.

Replacing the outer CV joint boot using a cap

September 4, 2012, 20:09 #1

The boot is torn - it needs to be replaced. I don’t want to shoot down a grenade. I watched the video and there’s a German showing how it’s done. He has a grenade drive right on his car. He turns the boot inside out. He takes the cone and lubricates it. He puts it on the grenade and with a bang he pulls the boot through the cone and it’s already on the drive! Has anyone tried to do this?

September 4, 2012, 20:50 #3

According to the manual, they recommend removing the entire drive from the box, supposedly to make it more convenient. Put the drive in a vice and do whatever you want with it. Just put a cloth in the box so that the oil does not drip. And if you shoot down a grenade, how will you get a new boot through it?

September 4, 2012, 21:23 #5

Exactly the left one. Shoot down a grenade there. Retaining rings, preferably new ones. Where are they? huh? In general, the crap is through the roof. And through the cap the chpok and put on the boot and lubricants can be filled into the CV joint of the new one.

September 4, 2012, 10:04 pm #7

September 4, 2012, 10:15 pm #8

Well, what did LECH WATCH?

September 4, 2012, 10:35 pm #10

I tried, although the cone was a little smaller in diameter, the febi boot / I rested the cone against the handle of a shovel in the garage - it worked.

Hyundai Elantra gls 1.6 Nissan Bluebird 1.8 SLX-G

5 September 2012, 18:41 #11

he turns it inside out with such ease, as if it were a condom! I don't know, but they are very tough. Personally, with the anthers that I hung on the bluebird, doing this would break my hands)

5 September 2012, 19:01 #12

So they sell universal anthers, the small diameter is the same 12 mm, and you choose the large one yourself by cutting it off. Their rubber is elastic, you can even pull this boot on someone completely. They are expensive and it makes sense to take them for foreign cars, but not for a basin

April 26, 2014, 16:04 #13

I tried the same thing, just for fun. I didn’t remove the grenade, I didn’t tinker with anything. I cut the old boot and pulled on a new one, took the cone from one and a half rifles. The boot changed the left outer one.

April 27, 2014, 03:11 #14 + 3

Help you while driving. I don’t know what you pulled on there, but even tuning polyurethane boots are impossible to tighten like that! For a simple reason - they tear. The drive diameter is 20 mm (roughly) and it needs to be stretched to 50-60! This trick was done, but the boot was universal and made of super elastic material

somewhere in the Arkhangelsk region

April 27, 2014, 09:58 #15 + 2

Maloy13, April 27, 2014, 03:11, #14

which means it’s cheaper to remove the grenade, and maybe even easier

Let's start the analysis.

To begin with, the procedure is common for both sides, installing cubes under the upper arm so that when lifted it does not fall on the frame, jacking up the wheel, installing a stop under the subframe beam.

place a cube under the upper arm to release the ball joint

Next, we remove the wheel; by the way, on the right side you can even do without removing the wheel; it is very easy to get the drive there. But I think it’s better to remove the wheel, it will be more intact.