Car suspension Skoda Fabia 2 It is known for its reliability, but certain parts are subject to accelerated wear due to the quality of our roads. One of the most vulnerable points is the rear silent block of the front lever. This element works under conditions of constant dynamic loads, twisting and vibrations, which inevitably leads to the destruction of the rubber metal structure.
Ignoring the signs of malfunction can lead not only to the appearance of a characteristic knock, but also to serious problems with handling and safety. Many owners try to save money by changing only the rubber insert, but often this turns out to be a dead end, requiring repeated costs. In this article, we will discuss how to choose the right part, what are the replacement methods and what to pay attention to when installing.
Functional purpose and causes of wear
The rear front arm silent block plays a critical role in suspension kinematics. It connects the lever to the subframe, ensuring the mobility of the node while maintaining rigidity in the longitudinal direction. The main task of the element is to extinguish the vibrations and absorb the shocks transmitted from the wheels to the car body. Skoda Fabia.
Why does this particular node fail more often than others? Rubber ages under the influence of temperature changes, aggressive reagents and oils. The metal sleeve inside can begin to corrosive, breaking the bond with the rubber clip. The result is a backlash that breaks the geometry of the collapse-convergence.
The main reasons for premature failure:
- ๐ Operation on roads with poor surface, where impact loads exceed the calculated standards.
- โ๏ธ The entry of technical fluids (brake fluid, oil) on the rubber surface, causing its swelling.
- ๐ฉ Violation of the technology of tightening of mounting bolts during previous suspension repairs.
Symptoms of malfunction and diagnostic methods
The first sign of a problem is often a vague knock or creak in the front of the car, which is especially heard when passing irregularities. The sound may appear to be coming from the front arches. It is important to understand that the sound can be similar to the knock of a shock absorber or ball support, so accurate diagnosis is required.
When visually inspected, you can often see obvious defects: cracks on the rubber part, detachment of metal from the rubber or complete loss of the shape of the sleeve. However, sometimes defects are hidden inside and can only be detected by swaying the lever with the mount.
How to check the condition of the element yourself:
- ๐ Examine the rubber for deep cracks, ruptures, or traces of oil.
- ๐ ๏ธ Use the mount to try to move the lever relative to the subframe; the backlash should not be noticeable.
- ๐ Measure the wear parameters if you have access to the rod by comparing it with reference values.
โ ๏ธ AttentionIf you feel that the front of the car is โleadingโ to the side or the steering wheel is deviating from a straight position without your participation, this is a sure sign of critical wear of the Bushing. Do not delay repairs, as this may cause the lever to break or the hub bearing to fail.
- Up to 100,000 km
- 100,000 - 200,000 km
- More than 200,000 km
- Exact mileage unknown
Selection of original parts and analogues
When selecting spare parts for Skoda Fabia 2 5J is important to focus on the catalog numbers. The original article of the rear silent block of the front lever often changes depending on the year of release and the type of suspension, so verification by VIN code is required. The standard number of the original part may look like 1K0 407 181 A or modifications thereof.
There are many analogues on the market that offer better rubber mix quality or a more affordable price. Brands that have proven themselves in VAG suspension repair include Lemfรถrder, TRW and Febi Bilstein. These manufacturers often supply parts to the conveyor, so their quality is comparable to the original.
Comparative table of popular manufacturers:
| Manufacturer | Type | Approximate price | Features |
|---|---|---|---|
| VAG (Original) | Original | High | Perfect geometry, but high cost |
| Lemfรถrder | Premium analogue | Average | Excellent rubber, often assembled with a lever |
| Febi | Middle segment | Average | Good price/quality ratio |
| Bushings (rubber only) | Repair kit | Low | It requires special equipment for the pressing |
Should I buy a lever in the collection?
Often, Silent blocks are sold separately, but in terms of service it is cheaper and faster to buy a lever in the assembly, since the risk of damage to the seat when pressing old rubber is eliminated. If the lever is not bent, the replacement of the sleeve is possible, but requires a hydraulic press.
Replacement technology: self-repair
Replacing the rear silent block of the front lever is not the most difficult procedure, but requires the presence of a special tool. You will need a hydraulic press or a removable for Bushings. Trying to knock out the old sleeve with a hammer is highly recommended, as it is almost guaranteed to damage the aluminum body of the lever.
The dismantling process begins with the removal of the wheel and unscrewing the bolt of the lever attachment to the subframe. The lever must be lowered slightly to free access to the Bushing. The old sleeve should be pressed using a mandrel of a suitable diameter. When installing a new part, it is important to observe the correct position: often there are marks or cutouts on the body of the Bushing, which should coincide with the direction of the load.
Step-by-step algorithm of actions:
- ๐ง Lift the car on the lift or securely set on the supports.
- ๐จ Unscrew the bolt of the rear arm hinge attachment to the subframe.
- ๐ Use the press to press the old sleeve and press the new one.
โ๏ธ Preparing to replace the silent block
Nuances of installation and tightening of fasteners
One of the most common mistakes in repair is tightening the bolts of the lever attachment to the subframe in the suspended state of the car. This leads to the fact that the rubber sleeve is twisted under the load of the weight of the machine. As a result, the Bushing quickly fails, and the suspension begins to knock after a couple of thousand kilometers.
The right technology requires tightening the fastener under load. This means that the car must be on wheels and the suspension must be in working position. To do this, you need to lower the car to the ground, install a jack under the lever and raise it to a position that simulates a static load on the suspension, and then tighten the bolt with the required moment.
Recommended tightening moments for lever bolts:
- ๐ Hub mounting bolt:
70 Nm + 90ยฐ(full turn). - ๐ Bolt to subframe:
80 Nยทm + 90ยฐ(full turn). - ๐ Check the puff after 1000 km of run after replacement.
โ ๏ธ AttentionIf you use bolts with detachable heads (as is often the case with VAG), they cannot be reused. Be sure to replace them with new ones, as they are disposable and when re-puffed, they may break off or not provide the desired pressing.
Before starting work, be sure to apply a medium-strength thread fixer to the thread of new bolts to exclude self-unwinding from vibrations, but at the same time preserve the possibility of disassembly in the future.
Tightening of the bolts of the lever attachment should be made only when the load on the suspension is loaded, when the car is on wheels, otherwise the life of the Bushing will be reduced by several times.
Wheel alignment after replacement
Any interference with the kinematics of the suspension, including the replacement of the front arm silent blocks, requires the procedure for adjusting the angles of the wheel installation. Changing the geometry of the lever, even by millimeters, can significantly affect the collapse and convergence.
If you neglect this step, you will encounter uneven tire wear. The front wheels can eat rubber on one side after 5,000 km. In addition, the car can become less stable on the track and start to take a sideline when letting go of the steering wheel.
After replacement, be sure to:
- ๐ Pass the procedure of computer adjustment of the collapse-descend.
- ๐ Check the condition of the tires and, if necessary, make their rotation.
- ๐ Check the absence of backlashes in other suspension nodes that could be masked by the knock of the Bushing.
โ ๏ธ AttentionAdjusting the collapse-declination without first checking the condition of all suspension elements (including steering tips and thrusts) does not make sense, since new Silent blocks can simply hide the backlashes elsewhere.
Is it possible to drive without a wheel alignment?
Technically, it is possible to reach the service, but daily operation with broken geometry will lead to rapid wear of rubber and loss of handling. Don't risk your safety.
FAQ: Frequently asked questions
How long does it take to replace one silenth block?
The process of replacing one rear silent block of the front lever in an experienced master takes from 30 to 60 minutes, including dismantling and installation. If you need to replace the lever in the assembly, the time is reduced, but the cost of the spare part increases.
Is it possible to replace just the rubber bushing without a press?
Without a special hydraulic press or puller, it is almost impossible to replace a rubber bushing with high quality. The use of improvised means (hammer, pry bar) often leads to deformation of the aluminum lever body, after which it will have to be replaced entirely.
How often do you need to change silent blocks on a Skoda Fabia 2?
The service life of original silent blocks is usually 80,000 โ 100,000 km. However, when used on bad roads or in aggressive conditions (reagents, temperature changes), the service life can be reduced to 50,000 km.
Do I need to change silent blocks in pairs?
It is advisable to change them in pairs (left and right), since wear usually occurs symmetrically. If you replace only one, the imbalance of the suspension can lead to rapid wear of the new part and loss of vehicle stability.
What tools are needed for DIY replacement?
You will need a set of sockets and wrenches, a jack, stands for the car, and most importantly, a puller for silent blocks or a hydraulic press. A torque wrench is also required to properly tighten the bolts.