The steering knuckle is one of the most loaded vehicle suspension components Skoda Octavia Tour. It is through this element that the forces from the steering and braking system are transmitted to the wheel, and also ensure its rotation on the bearing. On cars of this model, especially with high mileage, this unit is subject to wear, which can lead to serious consequences for handling and traffic safety.
Owners are often faced with the need to replace the knuckle when the wheel bearing fails or when the unit is deformed after falling into a hole. It is important to understand that on the platform PQ34on which it is based Octavia Tour, the suspension design has its own characteristics that require a careful approach during repairs. Ignoring problems with this element can lead to wheel jamming or complete destruction of the unit while driving.
The main symptoms of a front knuckle malfunction
Careful attention to the carโs behavior helps to recognize the problem in the early stages. Often the first signal is extraneous noise, which varies depending on speed and load. If you hear a hum or whine that gets louder as you turn, this may indicate a bearing failure inside the knuckle itself.
The second critical sign is wheel play. When lifting a car on a lift or jack, it is necessary to swing the wheel in the vertical and horizontal planes. The presence of a noticeable gap that cannot be eliminated by adjusting the bearing tightening often indicates that the bearing seat in the knuckle is broken or the housing itself is deformed.
- ๐ The appearance of a hum or knocking sound when driving over uneven surfaces, which changes when you turn the steering wheel.
- ๐ Uneven wear of the brake pads due to a violation of the caliper mounting geometry.
- ๐ง Vibration of the steering wheel at high speeds that does not go away after balancing.
- ๐ There is a noticeable vibration in the brake pedal when pressed hard.
Often the problem is disguised as a malfunction of the shock absorber or silent blocks of the levers. However, upon closer inspection, it becomes clear that the source of the problems lies precisely in the steering knuckle. The deformation of its walls leads to the fact that the wheel alignment angles cannot be adjusted to factory tolerances.
โ ๏ธ If during the inspection you find cracks on the body of the fist or obvious traces of corrosion that threaten its integrity, the operation of the car is strictly prohibited until the part is replaced.
Sometimes owners Octavia Tour The problem is that after the replacement of the bearing, the problem does not disappear. This is because the landing site has already lost its geometrical parameters. In such cases, replacing only the bearing does not make sense, it is necessary to change the entire assembly.
Choice of spare parts: original or analogue
Spare parts market for Skoda Octavia Tour It offers a huge selection of options: from original parts to budget counterparts. When choosing, it is important to consider that the fist is not just a cast part, but an element on which safety depends. Cheap products are often made of brittle metal that may not withstand the impact load.
The original fist from VAG It provides perfect fit for the seats and durability, but its cost can be high. Many owners choose quality analogues from proven brands that offer the best value for money. It is important to check whether there are certificates and reviews about a particular manufacturer before buying.
- ๐ Skoda/VAG - original detail with a guarantee of quality and accuracy of geometry.
- โ๏ธ Lemfรถrder, TRW Premium analogues, often supplied to the conveyor.
- ๐ Febi Bilstein, SWAG - reliable German brands of the middle price segment.
- ๐ฐ Budget Chinese analogues - the risk of rapid breakdown and disruption of the collapse-convergence.
When buying, be sure to check the equipment. In some cases, only bolts are included, and sometimes new hub bolts or ABS sensors are included. Lack of necessary fasteners can delay repairs for several days.
- Original VAG
- Premium analogue (Lemfรถrder)
- Mid-segment (Febi)
- Budget option
Necessary tools and preparation for replacement
Replacing the fist with Octavia Tour It is a time-consuming process that requires a specialized tool. Without a hydraulic press or a powerful bearing removable, it is extremely difficult to do, since the old bearing sits very tightly and often clings. You will also need a set of heads, a dynamometer key and a means for processing threads.
Prepare the workplace by ensuring reliable fixation of the car. The wheel must be removed and the suspension unloaded. Do not try to carry out work relying only on the jack, as the risk of falling the car is too great. Use the safety stands.
โ๏ธ Preparing to replace the fist
Pay special attention to the bolts of fastening the shock absorber to the fist. They are often conical in shape and can be boiled. Use penetrating lubricant in advance to facilitate the unwinding process. Also prepare a new ABS sensor, as the old one often breaks down when dismantled due to corrosion.
If you plan to change the bearing separately, you will need a mandrel for pressing. However, for most owners, a more rational solution would be to completely replace the assembly assembly, which will save time and reduce the risk of errors during assembly.
Difficulties in removing the mortar nut
The nut of the stupa on the Octavia Tour is tightened with a huge moment (about 250 Nm). To unscrew it may require a long lever or pneumatic nuts. Sometimes you have to use a Bulgarian if the nut is dead boiling, but this is an extreme measure, since you can damage the thread on the semi-axis.
Step-by-step replacement instructions
The process begins with the dismantling of the wheel and brake caliper. The subport should be hung on the wire so as not to damage the brake hose. Then the brake disc is removed. Then the sleeve is pulled down, which is the sleeve of the sleeve. Be careful not to lose the ring.
Next, the steering tip must be disconnected from the swivel fist. Use the removable so as not to damage the thread. Then the bolts of the shock-absorbing rack attachment to the fist are unscrewed. These are the most difficult bolts that require considerable effort. After they are unscrewed, the fist is released from the side of the shock absorber.
The next step is to disconnect the lower ball support and pull the lever down. Now you can take the half-axle out of the hub. If the semi-axle does not come out, do not hit it with a hammer, use a removable or gently tuck in the mount. After that, the fist can be completely removed from the car.
Before unscrewing the bolts, be sure to mark their location and position of the fist relative to the lever if you plan to adjust the angles of the wheel installation yourself.
The installation of a new fist is carried out in reverse order. It is important to observe the time of tightening of all fasteners. Use a dynamometer key to control. Pay special attention to the nut of the hub - its puff is critical for the durability of the bearing.
The correct tightening of the nut of the hub and the bolts of the shock absorber fastening is the key to the safe operation of the suspension after replacing the fist.
Cost of repair and features of diagnostics
The price of repair depends on the selected spare part and the cost of work. The original fist can cost from 15 000 to 25 000 rubles, while the quality analogue will cost 8 000 โ 12 000 rubles. Replacement work in the service usually takes 3-5 hours and costs from 5 000 to 10 000 rubles.
Diagnosis includes not only a visual inspection, but also a check on the stand of the collapse-descend. If after replacing the fist, the angles of the wheels can not be exposed, this indicates hidden defects of the levers or shock absorber racks. A complete diagnosis of the suspension is mandatory.
| Parameter | Original VAG | Analogue (Lemfรถrder) | Analogue (Febi) |
|---|---|---|---|
| Cost of part (ruble) | 18 000 - 25 000 | 9 000 - 12 000 | 6 000 - 8 000 |
| Service life (km) | 150 000+ | 100 000 - 120 000 | 80 000 - 100 000 |
| Material | High strength alloy | Forged steel | Cast alloy |
| Manufacturer's warranty | 24 months | 24 months | 12 months |
| Availability of ABS sensor | Yeah (often included) | Often separately | Separately |
It is important to consider that when replacing a fist, other elements, such as the anthers of the SRUS or the semi-axis glands, are often required to be replaced. This increases the total cost of repairs, but ensures the reliability of the site for the long term.
โ ๏ธ Note: Do not skimp on the work of the master. Poor assembly can lead to the fact that after several thousand kilometers will require re-repair, which will cost more.
If you decide to change your fist yourself, keep in mind that you will need not only a tool, but also skills to work with suspension. Errors in tightening bolts can lead to spinning of the wheel on the go. If you are not confident in your abilities, entrust the work to professionals.
Common replacement errors and their consequences
One of the most common mistakes is trying to hammer a new bearing with a hammer. This leads to microcracks in the clip and rapid failure. Only the press and the press can be used. It is also unacceptable to overheat the fist when pressed, as this changes the structure of the metal.
Another mistake is ignoring the replacement of the ABS sensor. An old sensor often has a damaged wire or contaminated head, leading to errors on the dashboard. Replace it immediately to avoid problems with the stabilization system.
- โ Using a hammer to press the bearing.
- โ Ignoring the moment of tightening of the nut of the hub.
- โ Damage to the SRUS anther during the extraction of the semi-axis.
- โ Refusal to pass the collapse-descend after repair.
Installing the ABS sensor incorrectly can also cause problems. The gap between the sensor and the magnetic ring must be strictly defined. If it is too big or small, the system will not work properly.
How to check the performance of the ABS sensor
Check the sensor resistance with a multimeter (usually 800-1500 Ohms). If the resistance is infinite or zero, the sensor is faulty. Also check the integrity of the wire and the absence of a short circuit on the mass.
Recommendations for post-repair maintenance
After replacing the fist, the descent-breakdown procedure must be carried out. This is critically important, as even the slightest deviation of the wheel installation angles will lead to rapid tire wear and deterioration of handling. Check the tire pressure and suspension status every 10,000 km.
Watch the condition of the anthers of the SRUS and ball supports. If they are damaged, dirt will get inside the node and cause accelerated wear. Timely replacement of anthers will extend the life of the suspension for thousands of kilometers.
Avoid aggressive driving and getting into deep pits. Even a new fist can deform when hit hard. Check the suspension regularly for cracks and corrosion, especially in winter when the roads are covered with reagents.
Regularly passing the collapse-descend and inspecting the anthers of the suspension is the best way to extend the life of a new fist.
FAQ: Frequently asked questions
Can you replace only the sleeves?
Theoretically, it is possible, but in practice it is a complex process that requires special equipment. Nana Skoda Octavia Tour It is often easier and cheaper to replace the entire fist assembly, especially if it already has signs of wear or corrosion.
How long does it take to replace a fist?
For an experienced master, the replacement takes 3-4 hours. If you need to replace the semiaxis or ABS sensors, the time can increase to 5-6 hours.
Do I need to do a wheel alignment after replacement?
Yeah, that's a must. Any work with suspension elements that affect the angles of wheel installation requires subsequent adjustment on the stand.
Which fist is better to choose for winter operation?
For severe winters, it is better to choose original parts or premium analogues from a high-strength alloy that is resistant to corrosion. Avoid cheap cast options.
What if the ABS sensor doesnโt work after replacement?
Check the connection of the connector and the integrity of the wire. Often the sensor is damaged during dismantling. If the wire is intact, replace the sensor itself or check the magnetic ring on the hub.