The appearance of a hum changing depending on speed, or a backlash in a wheel on your Skoda Superb The second generation (3T) are the sure signs of wear of the hub node. Ignoring this problem can lead to a jamming of the wheel on the go, which creates a mortal danger for both the driver and the surrounding road users.
Replacement process hubs On this model has its own specific features associated with the suspension design and the presence of complex ABS sensors. Unlike simpler cars, it requires accuracy when working with sensors and the correct sequence of unscrewing of fasteners so as not to damage the body elements or brake system.
Many owners try to postpone a visit to the service, hoping that the knock will pass by itself, but the mechanics are inexorable: the wear will only progress. Wheel bearing It works in extreme conditions, being subjected to enormous loads from the weight of the car and impacts from road irregularities, so its repair requires a serious approach.
Diagnosis of the malfunction and selection of repair site
Before you go to the store for spare parts, you need to accurately determine the source of the noise. Drivers often confuse bearing knocking with a malfunction of ball joints, levers, or even brake discs. Correct diagnostics will save you time and money by eliminating the purchase of unnecessary components.
To check, raise the car on a lift or jack and swing the wheel in a vertical plane (top to bottom). If you feel noticeable play, and when the wheel rotates, you hear a hum or crunch, the problem is almost guaranteed to be in the bearing. It is also useful to listen to the sound when driving in a straight line: if the noise increases when turning right, it means the left bearing is worn out, and vice versa.
It is important to consider that Skoda Superb 2 Often it is the front components that fail due to the greater load during braking and acceleration. Rear bearings last longer, but replacing them also requires attention, especially if the car is equipped with a multi-link rear suspension.
โ ๏ธ Warning: Do not attempt to drive a vehicle with a completely destroyed bearing. This can cause the wheel to come off and damage the brake caliper, turning a simple repair into an expensive replacement of the entire hub and suspension components.
The decision to carry out the repair yourself or have it done at a service center depends on your experience and the availability of tools. To work you will need a powerful hydraulic press or a set of pullers, as well as a torque wrench to properly tighten the bolts.
Selection of quality spare parts and consumables
Spare parts market for Skoda Superb 2 is oversaturated with offers, and choosing the right manufacturer is 50% of success. Cheap Chinese analogues often do not last even 10 thousand kilometers, producing the same hum that you tried to eliminate. It is recommended to choose trusted brands that specialize in chassis.
The best options are original spare parts from Skoda, as well as high-quality analogues from such manufacturers as SKF, FAG, Timken or SNR. These companies use high-quality steel and precision assembly, ensuring the unit will last a long time even under aggressive driving conditions.
- ๐ง Original hub assembly (the most reliable, but expensive option).
- ๐ง Bearing + hub set (optimal balance of price and quality).
- ๐ง Separate bearing (requires special tools for pressing).
In addition to the bearing itself, be sure to purchase new wheel bolts, as old ones may be deformed. Also be sure to buy spline lube and brake cleaner to prep the seat.
Pay special attention to the ABS sensor, which is often assembled with the hub or mounted separately. If you buy a separate bearing, check that the sensor magnetic ring is included in the kit, otherwise the anti-lock brake system will generate an error.
Preparation of tools and workplace
To successfully replace, you will need a set of specialized tools. A regular jack and wrenches will not be enough, since the hub bolts often stick and require significant force to unscrew. Prepare wheel wrench with extension or pneumatic impact wrench.
The key element will be the presence of a jack and reliable stands (goats), since working under the machine with only a jack is dangerous. Also be sure to prepare a penetrating lubricant such as WD-40 or equivalent to treat all threaded connections before disassembling.
โ๏ธ Necessary tool
Don't forget about personal protective equipment: gloves and goggles will protect your hands and eyes from rust and metal shavings. You need to work on a level area, preferably in a garage, where there is lighting and the ability to safely secure the car.
Remove the wheel and unscrew the hub bolt. This bolt is usually very tight, so it may be necessary to use a lever or roll on the lever to get it out of place. Be careful not to bend the wheel rim.
What to do if the bolt does not come off?
If the hub bolt does not budge, try heating it with a torch or applying more penetrating lubricant and leaving it for 15-20 minutes. Sometimes it helps to gently hit the end of the bolt with a hammer to loosen the threads, but do not overdo it so as not to damage the splines.
Step-by-step instructions for dismantling the old unit
Begin by disconnecting the battery to avoid accidental sensor activation or short circuit when disconnecting the ABS wiring. Unscrew the hub mounting bolt, which is located in the center of the wheel, and set it aside.
Remove the brake caliper without disconnecting the brake hose. Hang the caliper with a wire to the suspension spring so that it does not hang on the hose and damage it. Then remove the brake disc, which may be held on by one screw.
Now you need to unscrew the lower bolt of the shock absorber and the steering tip to free the steering knuckle. This will allow you to move it to the side and gain access to the hub. Be careful with the ABS sensor, carefully disconnect the connector and unscrew the mount of the sensor itself.
Next comes the most difficult stage - knocking out or squeezing out the old hub. If you change the hub assembly, then the entire assembly is removed entirely. If you are replacing only the bearing, you will need to press the hub out of the bearing housing.
- ๐จ Use a mandrel of the appropriate diameter to knock the hub in or out.
- ๐จ Never hit the bearing body directly with a hammer as this will destroy its internal structure.
- ๐จ Clean the seat in the steering knuckle from rust and old grease.
Before knocking out the hub, make a mark on the bearing housing and steering knuckle so that during assembly you do not confuse the orientation of the ABS sensor if it is removable.
New bearing installation and assembly
Installing a new bearing requires jeweler's precision. If you use a press, press the part in, applying force strictly along the outer ring. If you are using a hammer, use a special mandrel or an old hub to distribute the impact force evenly.
After installing the bearing into the steering knuckle, it is necessary to press in a new hub. Do this by applying force only to the inner race of the bearing. Improper pressing can lead to rapid destruction of the cage and the re-appearance of noise.
Reassemble the assembly in the reverse order: install the steering knuckle in place, tighten the bolts securing the strut and steering tip. Install the brake disc and caliper, connect the ABS sensor connector. It is important to ensure that the sensor is clean and installed correctly.
Install the new hub bolt to the recommended torque. For Skoda Superb 2 this moment is usually about 200 Nm, but it is better to check the exact data in the service documentation of your car. Do not fully tighten the bolt until the wheel is on the ground.
The main mistake when replacing is an attempt to press the bearing through the inner ring when installing it into a fist, which destroys the cage. Always press down on the outer ring.
Torque table and technical data
Maintaining the correct tightening torques is critical to safety. Tightening the bolts too loosely will lead to them unscrewing and destroying the suspension, and too much tightening will lead to stripping of the threads or deformation of parts. Use a torque wrench for a final check.
| Fastening element | Tightening torque (Nm) | Note |
|---|---|---|
| Hub bolt | 200 | New bolt, torque wrench |
| Shock absorber bolt | 140 + additional turn | Often requires additional turning |
| Tie Rod Bolt | 25 | Protective nut |
| Brake caliper bolt | 30 + additional turn | Depends on year of manufacture |
| ABS sensor mount | 10 | Plastic retainer or screw |
After completing assembly, be sure to check for play. Try rocking the wheel with your hands to make sure there are no gaps. Also check the operation of the brakes and the absence of extraneous sounds when spinning the wheel.
- Front MacPherson
- Rear multi-link
- Rear beam (rare)
- I don't know
Wheel alignment and final check
After replacing a wheel bearing, especially if you have affected steering or suspension components, geometry wheels may be broken. This leads to uneven tire wear and the car pulling to the side when driving. Therefore, a visit to the wheel alignment stand is mandatory.
When adjusting the wheel alignment, the technician will check the wheel alignment angles and adjust them if necessary. For Skoda Superb 2 the tolerances are quite strict, and this stage should not be neglected, otherwise the new tires may be โeaten upโ in just a couple of thousand kilometers.
For the first 50-100 kilometers after the replacement, try to drive in a gentle mode, avoiding sudden acceleration, braking and driving through deep holes. This will allow the parts to โget inโ and ensure the quality of the work done. Listen to sounds coming from the wheel arches.
If the hum has disappeared, and the steering wheel has become straight and does not vibrate, then the work has been completed successfully. Don't forget to check the tightness of the hub bolt after a week, as it may loosen a little after the first ride.
Frequently asked questions (FAQ)
Is it possible to replace only the bearing and not the hub assembly?
This is technically possible, but requires a hydraulic press and special tools. In practice, hubs often show signs of wear on the seats, so replacing them as an assembly is more reliable and faster.
How long does it take to replace one bearing?
For an experienced craftsman with the right tool, replacing one unit takes 1-1.5 hours. For the first time, without experience and without a press, the process may take 3-4 hours.
Why does the ABS light come on after replacement?
This may be due to damage to the sensor wiring, dirt on the magnetic ring, or the need to reset the error through the diagnostic scanner after installing a new part.
Do I need to replace both bearings at once?
No, only the faulty one needs to be replaced. However, if the car has a long mileage (more than 150 thousand km), it makes sense to check the condition of the second unit, since they wear out at about the same rate.
โ ๏ธ Caution: Never reuse old hub bolts. They work in shear and tension, and their metal is tired. Re-installation may result in the wheel coming loose while driving.
Replacing the wheel bearing with Skoda Superb 2 - a task that can be done for those who are willing to devote time and attention to detail. The main thing is to use high-quality spare parts, observe tightening torques and not skimp on tools. This will ensure the safety and comfort of your trip.