Car suspension system Skoda Octavia A7 is one of the most loaded units, requiring constant attention from the owner. A special place in this design is occupied by support bearing, which connects the shock absorber strut to the body, ensuring a smooth ride and the ability to rotate the wheel when turning the steering wheel.
Without a serviceable element, the suspension begins to make extraneous sounds, lose control, and in the worst case, the strut mount is destroyed. For owners Octavia A7 With front-wheel drive and a multi-link rear suspension, the problem of wear of the front supports is relevant, since they take on significant vertical and lateral loads.
Design features and purpose of the unit
In the car Skoda Octavia A7 A journal bearing is a complex assembly consisting of an outer housing, an inner ring and a set of balls or rollers placed in a cage. It performs a dual function: it absorbs axial loads from the weight of the car and allows the shock absorber to rotate with the strut when the wheels turn.
The design of the unit is often integrated with an upper support (cushion), which is made of durable rubber to dampen vibrations. Depending on the suspension modification, on Octavia A7 Both solid units and separate elements can be found, where the bearing is changed separately from the rubber cushion, although in practice the entire unit is more often replaced.
It is critically important to understand that bearing wear This leads to the appearance of backlash, which destroys the seat in the body. If you ignore the problem, the shock absorber glass can deform, which will require expensive body repairs, rather than just replacing the spare part.
Symptoms of malfunction and diagnostic methods
Determine the faulty bearing bearing on the Skoda Octavia A7 It can be based on a number of characteristic features that appear during operation. The most obvious symptom is a characteristic knock or creak that occurs when turning the steering wheel in place or at low speed. This sound is similar to a dry crunch, which is enhanced by the rotation of the steering wheel left-right.
Another sign is the appearance of knocking when passing irregularities, especially on small bumps. The sound can come from the front of the suspension and resemble metal hitting the metal. It is important to distinguish this knock from a malfunction of the shock absorber or levers, since diagnosis requires a careful approach.
For accurate verification, a simple procedure must be performed:
- ๐ Open the hood and place your hand on the top of the shock rack (on the body or on the support itself).
- ๐ Ask the assistant to sway the steering wheel left-right, without letting it go abruptly.
- ๐ If you feel a beating or hear a knock directly in your hand, the bearing needs to be replaced.
It is also worth paying attention to the effort on the steering wheel. If the steering wheel turns too tight or, conversely, a backlash appears, this may indicate jamming or destruction of the bearing. Visual inspection often does not give results, since the separator and balls are hidden inside the body, but the presence of corrosion or cracks on the rubber part of the pillow is a sure sign of imminent failure.
Selection of quality spare parts and brands
The auto parts market offers a wide range of support bearings for Skoda Octavia A7Choosing the right manufacturer is the key to long-term suspension. Original details from Skoda/Volkswagen They provide the best quality, but their price often exceeds the cost of analogues by 2-3 times.
There are proven manufacturers of spare parts that offer excellent analogues, not inferior to the original in characteristics. These brands are Febi Bilstein, SACHS, SKF and Lemfรถrder. These companies use high-quality materials and precise geometry, which guarantees smooth running and the absence of extraneous noise.
When choosing, you should avoid cheap Chinese analogues of unknown brands, as they often have low metal hardness and poor-quality lubricant, which quickly washes out or dries.
โ ๏ธ Warning: Buying a bearing without an anther or with a damaged rubber part will lead to a rapid ingress of dirt and moisture inside the mechanism, which will cause jamming after several thousand kilometers of run.
A comparison table of popular brands will help you make an informed decision when buying:
| Brand | Country | Quality | Price | Service life |
|---|---|---|---|---|
| Skoda Original | Germany/Czech Republic | Excellent | High | 100,000+ km |
| Febi Bilstein | Germany | Very good | Average | 80,000 - 100,000 km |
| SACHS | Germany | Very good | Average | 70,000 - 90,000 km |
| SNR | France | good | Average | 60,000 - 80,000 km |
| Chinese brands | China | Low | Low | 10,000 - 30,000 km |
- Original (Skoda/VW)
- Premium analogues (Sachs, Febi)
- Budgetary analogues (Kraft, Topran)
- I don't know what to choose
Replacement procedure: step-by-step instructions
Replacing the support bearing with Skoda Octavia A7 - a task of medium complexity, which can be performed independently with the necessary tool and lift or observation pit. You will need a jack, a balloon key, a set of heads (including 13, 16, 18 mm), a key to unscrew the shock absorber rod and a dynamometer key.
First, you need to remove the wheel and unscrew the nuts of the caliper mounting, hanging it on the wire so as not to damage the brake hose. Then unscrew the bottom bolt of the mounting of the rack to the rotary fist and carefully remove the rack in the assembly from the suspension.
To disassemble the rack, it is necessary to fix the shock absorber rod and unscrew the nut from above.
โ ๏ธ Attention: Use special spring screeds to compress the spring before unscrewing the support nut. Improper handling of the spring can result in injury or damage to property.
After removing the old support, clean the seat on the shock absorber and install the new bearing along with the upper cushion. Assembly is made in reverse order, necessarily controlling the moment of tightening of all connections.
โ๏ธ Preparing for replacement
An important step is the correct tightening of the nut of the shock absorber rod. If you don't tighten it enough, you'll get a slug and a knock. If you pull - you can tear the thread or damage the oal of the stock.
Before installing a new support, apply a thin layer of silicone lubricant to the thread of the rod and the inner surfaces of the bearing to prevent corrosion and facilitate rotation.
Settings of wheel installation angles (Flow-Fall)
After the replacement of the bearing, Skoda Octavia A7 The obligatory procedure is to adjust the angles of installation of wheels. Any intervention in the suspension, especially the removal of the pillars, changes the geometry of the chassis, which can lead to uneven wear of the tires and deterioration of handling.
If you do not make a descent-collapse, the car can pull to the side, and the tires will be washed on one side much faster. This is not only economically unprofitable, but also dangerous when driving at high speeds.
Adjusting the angles of the wheels after replacing the bearings is a mandatory procedure, ignoring which will lead to rapid failure of the rubber and controllability problems.
The procedure is carried out on a specialized stand, where the master measures the angles of convergence, collapse and angle of the longitudinal inclination of the axis of rotation. For Octavia A7 There are strict factory tolerances that must be followed.
It is also worth checking the condition of other suspension elements, since when removing the rack, it becomes available to inspect the levers, Silent blocks and ball supports. This will help to identify hidden faults at an early stage.
Why can't you do a crash without taking off the wheels?
When replacing the support, the rack is dismantled, which violates its position relative to the body. If you do not remove the wheels and unscrew the mount bolts, the geometry will not be restored correctly, and the measurement data will be false.
Typical errors during operation and maintenance
Many owners Skoda Octavia A7 They make mistakes that shorten the life of the bearings. One of the most common is ignoring periodic inspections of the suspension. Many people think that if the car doesnโt knock, then thereโs no problem, but hidden wear and tear can lead to a sudden failure.
Another mistake is to replace only the bearing without replacing the upper support (rubber cushion). Rubber swells and cracks over time, losing its shock-absorbing properties. Installing a new bearing in an old, broken pillow will not solve the problem of vibrations and noise.
It is also not recommended to use aggressive chemicals to clean the suspension, which can damage the rubber elements.
โ ๏ธ Attention: The use of solvents or acidic cleaners for suspension can cause the rubber anthers and cushions to crack, which will accelerate the wear of the bearing.
Proper operation of the car involves avoiding sharp bumps on the wheels when driving pits at high speed. This creates peak loads that can warp suspension parts and disrupt bearing geometry.
How do you extend the life of a bearing?
Regular cleaning of the suspension from dirt and salt, timely replacement of the lubricant (if provided by the design) and avoiding extreme driving significantly increase the resource of the unit.
Timely replacement of worn suspension elements is not only a matter of comfort, but also safety. Ignoring the symptoms can lead to the fact that at the most inopportune moment the steering wheel will cease to obey, or the rack will fly out of the body.
FAQ: Frequently asked questions
How long do the bearings on the Skoda Octavia A7 run?
The average service life depends on the operating conditions and quality of the part. Original and high-quality analogues serve an average of 80,000 to 120,000 km of mileage. In bad roads, this period can be reduced to 60,000 km.
Can you replace the old bearing, leaving the old support?
Theoretically, this is possible if the rubber part of the support does not have cracks and tans. However, in practice, it is recommended to change the entire assembly, since the cost of a separate purchase is often comparable to the purchase of a kit, and reliability will be lower.
Do I need to replace bearings in pairs?
Yes, it is highly recommended to change the bearings in pair. If one is worn, the second is likely in a similar condition. This will ensure uniform suspension behavior and prevent knocking from the second side after a short time.
How to distinguish the knock of a bearing from the knock of a rack?
The thumping of the support is heard when turning the steering wheel in place or at low speed, as well as when passing small irregularities. The knock of the shock absorber (stand) is usually heard when passing large pits and irregularities, and it is more deaf. Diagnosis with your hand on the top of the glass when swaying the steering wheel helps to pinpoint the source.
What happens if you drive with a faulty bearing?
This will lead to the destruction of the seat in the glass of the body, the appearance of backlash in the steering, uneven wear of the tires and deterioration of handling. In a critical case, complete destruction of the unit and loss of control over the car can occur.