The wheel drive system is one of the most loaded components of a car. Nissan Qashqai, especially when it comes to versions with all-wheel drive 4x4. Constant velocity joint, popularly known as CV joint, transmits torque from the gearbox to the wheels, allowing them to turn and work on uneven roads. If a characteristic crunch or clicking sound occurs when turning the steering wheel, ignoring the problem can lead to jamming of the mechanism and a complete loss of controllability in motion.
Many crossover owners Nissan Qashqai are faced with the need to repair the drive after 100 thousand kilometers. This is due to aggressive operation, the quality of the road surface and the design features of the suspension. Replacement CV joint - This is not just replacing a part, but a complex procedure that requires an understanding of the drive shaft structure and the availability of special tools. In this article we will analyze all the nuances of diagnostics, selection of spare parts and the replacement process itself.
Diagnostics of malfunctions of external and internal CV joints
Even an inexperienced driver can detect a joint failure at an early stage if he carefully listens to the operation of the car. The main symptom of the malfunction external CV joint - this is a rhythmic metallic crunch that intensifies when the steering wheel is turned in the direction opposite to the rotation of the wheel. If the sound is heard when turning left, then the problem is in the right drive, and vice versa. This happens because when turning, the load on the outer joint increases, and worn bearings begin to slip.
Symptoms of malfunction internal CV joint (tripods) are often more insidious. They manifest themselves in the form of vibrations in the steering wheel and body during acceleration, especially at high speeds. Sometimes a knocking noise appears when you suddenly start from a stop or when changing gears. It is important to distinguish these sounds from knocking noises in the suspension or wheel bearings. For an accurate diagnosis, it is necessary to raise the car and manually check the play in the joints by rocking the drive shaft in different planes.
- π Crunching when turning is a classic sign of wear external grenade on Nissan Qashqai.
- π³ Vibration during acceleration is a sure symptom of a problem with internal CV joint (tripod).
- π§ Lack of lubrication or a torn boot is the reason why the hinge failed ahead of time.
Owners often confuse knocking CV joint with a knock from the wheel bearing. The difference is that the bearing knock is heard constantly when driving, regardless of the steering wheel, and its frequency directly depends on the speed of rotation of the wheel. In the case of a grenade, the sound appears only when loaded and the angle of rotation changes. If you hear suspicious sounds, do not delay diagnosis, as the destruction of the joint can lead to a wheel jam right on the road.
β οΈ Attention: If you hear a sharp crunch while driving and the car loses traction, stop immediately. Destroyed CV joint may tear off the drive shaft and lock the hub, resulting in an accident.
Selection of quality spare parts and components
Spare parts market for Nissan Qashqai oversaturated with offers, but quality varies significantly. Original CV joint from Nissan (part number often starts with 38420) is considered the standard of reliability, but its cost often scares off owners. Brands are an alternative SPAX, GKN (Loxare), SKF and NTN. These manufacturers supply components to conveyors, so their products are often not inferior to the original, and sometimes even exceed it in terms of service life in harsh conditions.
When purchasing, pay attention to the type of packaging and the presence of protective film. Cheap analogues from China are often sold without boots or with low-quality lubricant inside. For Nissan Qashqai It is recommended to choose kits that include the hinge itself, a new boot, retaining rings and fresh lubricant. This will simplify installation and ensure the durability of the repair. Do not skimp on boots, as they protect the mechanism from dirt and moisture.
- π Original Nissan - maximum reliability, but high price.
- π‘οΈ Brands GKN and SKF - optimal price-quality ratio.
- βοΈ It is important to check availability lubricants included before installation.
There is an opinion that replacing only one hinge is sufficient, but practice shows that if one is worn out, the second is on the verge of failure. If the car's mileage exceeds 150,000 km, it is advisable to replace both CV joint (external and internal) on one drive or on both at once. This will avoid a second visit to the service in a couple of months. It is also worth checking the condition of the drive shafts for bending.
- Original Nissan
- GKN/SKF
- Luk
- Budget Chinese
Necessary tools and preparation for work
Replacement process CV joint on Nissan Qashqai requires specialized tools and good physical fitness. A standard set of wrenches will not be enough, since the hub nuts and hinge fastenings are tightened with great force. You will need a powerful wrench, a wheel wrench, a jack, car stands and a set of sockets with extensions. Pay special attention to the hub nut wrench, as it is a non-standard size.
To remove the joint itself, you will need a drive shaft puller or a spudger to carefully press the inside out of the transmission. You also cannot do without a hammer, chisel and vice to dismantle the old boot and press in the new hinge. If you are planning to change internal CV jointThe subframe may have to be removed or lowered to access the mountings.
- π§ Powerful wrench and ratchet with 17, 19, 21, 24, 30 mm heads.
- π¨ Hammer, pry bar and puller for pressing the drive out of the gearbox.
- π οΈ Vise and mandrel for pressing CV joint on the shaft
Before starting work, be sure to remove the negative terminal from the battery to avoid short circuits when working with electrical equipment or ABS sensors. Make sure that the car is on a level surface and securely supported by stands. Do not rely solely on a hydraulic jack - it is dangerous. Also have a rag, brake cleaner and new joint grease ready.
βοΈ Preparation for replacing the CV joint
Step-by-step instructions for replacing the outer CV joint
We begin the process by dismantling the wheel and unscrewing the hub nut. This nut must be unscrewed before you jack up the car, otherwise the shaft will spin. Use a wrench with an extension and apply significant force. After lifting the car and removing the wheel, unscrew the caliper mounting bolts and hang it on a wire so as not to damage the brake hose. Then remove the caliper and disc.
Next, you need to unscrew the bolts securing the ball joint to the steering knuckle or disconnect the steering tip to free the hub. Carefully move the steering knuckle to the side and remove the drive shaft from the hub. Be careful not to damage the steering rack boot and brake hose. Now the drive hangs freely, and you can begin dismantling the old one. CV joint.
Unscrew the bolts securing the hinge to the hub (if the design provides for their presence) or simply knock it off the shaft. Often you have to use a pry bar to pry the hinge off. After removal, clean the shaft of old grease and dirt. If you change only the outer joint, the inner one remains in the gearbox, but it is also worth checking for play.
β οΈ Attention: Never hit the body with a hammer directly CV joint or by separator. Use a wooden spacer or hit the inner ring to avoid damaging the delicate parts of the mechanism.
To install a new joint, place a new boot and retaining ring on the shaft. Carefully hammer in the new one. CV joint onto the shaft using a mandrel of suitable diameter, resting on the inner ring. Fill the hinge with special lubricant (usually 100-150 grams), distributing it along the grooves. Install the boot, secure the clamps and reassemble the unit in reverse order. Be sure to tighten the hub nut to the recommended torque.
How to properly tighten the hub nut?
The wheel nut on Nissan Qashqai is tightened to a torque of 190-210 Nm. After tightening, be sure to check that the fixation is secure and that there is no play. If the nut has a slot, the cotter pin should be securely installed.
Replacing the internal CV joint and servicing the gearbox
Replacement internal CV joint - a more labor-intensive procedure that requires access to the gearbox housing. The drive shaft must be completely removed from the transmission. To do this, unscrew the bolts securing the hinge to the differential flange. Carefully, using a mounting blade, press out the shaft. Make sure that oil does not leak out of the box in large quantities - place a container under the drain hole or close the hole with a plug.
After removing the shaft, clean it of old grease and remove the old inner joint. At this stage, it is important to check the condition of the axle seal in the gearbox. If the oil seal shows signs of wear or leakage, it must be replaced, otherwise new oil will leak out. The internal joint is often a tripod that is pressed onto the shaft. To replace it you will need a vice and a special mandrel.
Installing a new internal CV joint is carried out similarly to the external one: cleaning the shaft, pressing in the tripod, installing the retaining ring and boot. Pay special attention to the amount of lubricant. The internal hinge operates under conditions of large axial loads, so there should be enough lubrication, but not excessive, so as not to rupture the boot when heated. After assembly, check that the shaft moves freely along the axis, but has no play in the radial direction.
Before installing the new boot on the shaft, lubricate its inside with silicone grease. This will prevent scuffing and make it easier to tighten the clamps.
Assembly difficulties and common errors
The most common assembly mistake is improperly tightening the hub nut. If you tighten it too loosely, the hub will begin to play, which will quickly destroy the new one. CV joint and wheel bearing. If you overtighten, you can break the threads or deform the parts. Use a torque wrench and strictly follow the manufacturer's instructions. For Nissan Qashqai The tightening torque is usually about 200 Nm, but it is better to check this figure in the service book for your year of manufacture.
Another mistake is damage to the boot during installation. The boot should fit tightly on the clamp and on the hinge body. If it is wrinkled or cracked, it will not be able to hold lube or keep dirt out. Often during installation, the boot gets stuck between the clamp and the body, which leads to its rupture at the first turn of the wheel. Use special clamp clamping tools or neat, round-nose pliers.
Sometimes difficulties arise when installing the drive shaft into the gearbox. The drive may not engage fully if the retaining ring does not snap into the differential groove. Do not use excessive force as this may damage the seal or flange. Try rocking the shaft and pushing it slightly. If the shaft does not go in, check the condition of the retaining ring - it may be deformed or missing.
| Parameter | Value for Nissan Qashqai | Note |
|---|---|---|
| Wheel nut tightening torque | 190β210 Nm | Depends on the year of manufacture and type of gearbox |
| Drive bolt tightening torque | 35β45 Nm | Bolts for fastening to hub or flange |
| Lubricant volume (external) | 120β150 g | Use specialized lubricant |
| Lubricant volume (internal) | 150β180 g | More than for external due to volume |
| Oil seal type | Rubber with dust ring | It is recommended to change when removing the drive |
It is also important to remember about balancing. If the drive shaft is bent or there is old CV joint with wear, vibration may appear at high speeds after replacement. In such cases, it is recommended to check the shaft balancing on a bench or replace the entire drive assembly, if economically feasible.
Proper tightening of the wheel nut with a torque wrench is the key to long service life of the new CV joint and wheel bearing.
Repair costs and alternative solutions
Replacement cost CV joint on Nissan Qashqai consists of the price of spare parts and labor. The original costs from 10,000 to 20,000 rubles per piece, while high-quality analogues can be found for 4,000β8,000 rubles. Service work will cost on average from 3,000 to 6,000 rubles per drive. If you change both CV joints (external and internal), the cost of work can increase to 10,000 rubles.
Some car owners choose an alternative option - purchasing a reconditioned drive assembly. This can be beneficial if the shaft itself is severely damaged or corroded. However, such drives often have a shorter service life. Another option is to buy a used drive from disassembly, but this is always a lottery, since it is impossible to accurately estimate the residual life of the hinges.
In any case, prevention is cheaper than repair. Regularly checking the boots and replacing the lubricant in them can extend their life. CV joint for tens of thousands of kilometers. If you notice a torn boot, do not wait for a crunch to appear, but immediately change it and the lubricant. This will save you significant money and stress in the future.
Frequently Asked Questions
Is it possible to drive with a crisp CV joint?
You can drive, but not for long. The longer you drive with a worn joint, the higher the risk of it completely breaking, which can lock the wheel and lead to an accident. It is recommended to replace the part as soon as possible.
Do I need to replace both CV joints at once?
It is advisable, especially if the mileage is high. If one is worn out, the second is most likely in a similar condition. Replacing both will prevent the need for repeated repairs in a short time.
What lubricant should I use for the CV joint?
Use only specialized CV joint lubricant (usually molybdenum disulfide based). Regular lithium or graphite grease may not be suitable and will lead to rapid wear.
Is it possible to replace the CV joint without removing the drive?
The outer CV joint can sometimes be replaced without removing the drive from the box, but this is inconvenient and takes up a lot of space. The inner CV joint almost always requires the drive to be completely removed.
How long does it take to replace a CV joint?
For an experienced technician, replacing one outer CV joint takes about 1.5β2 hours. If you change the internal one or both at once, the time can increase to 4β5 hours.