Car suspension is a very important element. There are many constructive options for it. On most budget-class cars, a dependent rear suspension (beam with coil springs) is installed. The circuit is quite simple and reliable. But sometimes it can be a problem. Well, let's look at how to change the silent blocks of the rear beam and what are the signs of their malfunctions.
Characteristic
This element is a rubber-metal support. What does the silent block look like? Photos of the item are presented in our article.
The bushing is used to reduce the amplitude of vibrations, vibrations and shocks that come from the wheels when hitting bumps. The item has a high resource. As practice shows, the replacement of silent blocks of the rear beam at the VAZ is required no earlier than after 100 thousand kilometers. But with an aggressive driving style, this figure can be much less.
Symptoms
How to determine that the car needs to replace the rear silent block of the rear beam? The main symptom is the nature of the suspension. During the movement you will feel creaks and blows in the back of the car. Every day they will increase.
Outwardly, this can be determined by the displacement of the central bush of the silent block or the break of the rubber lining. If the car was used carefully, the part may fail due to normal wear and tear. So, after 5-7 years, the rubber begins to "dubet". Silent block ceases to be so elastic and starts to play.
If you ignore the problem, uneven rubber wear may occur (due to the skew of the beam and violation of the installation angles of the rear wheels). The car will lose its former controllability - it will be entered in corners.
Which to choose?
There are several types of silent blocks (their photos are presented in our article):
The first are the classic version and are installed on cars from the factory.
The main component is rubber. They have good wind resistance, but wear out earlier. Polyurethane - more rigid. But at the same time they hold huge shock loads perfectly and nursing more than 150 thousand kilometers. The metal bushings on both elements are almost the same. But as reviews say, polyurethane is a more reliable option, especially for VAZ cars. Among domestic manufacturers it is worth noting CC20 (Samara city). This company produces suspension parts for all VAZ models - from the "Classic" to the "Vesta". Product reviews are generally positive. Motorists note the following advantages of polyurethane bushings:
- Service life . This is perhaps the main factor for which these silent blocks acquire. In view of this, motorists install polyurethane not only instead of the standard gum of the beam, but also of the stabilizer, levers and other suspension elements.
- Resistance to temperature differences . The main reason for the failure of rubber elements is operation in conditions of strong temperature changes. This is especially true of mid-latitudes, where in summer it is + 40 ° C, and in winter -25 ° C. As a result, the rubber loses its elasticity, there is a backlash of the suspension. This inevitably causes noise and increased creaking, which is heard on the street and in the cabin.
- A solid structure that provides better handling. However, with her, the driver loses in comfort. But as practice shows, the difference is not so great.
Cooking Tools
To replace the rear silent block of the rear beam successfully, we need:
- A set of keys and heads.
- Spray gun, jack.
- Garage with a pit (just a flat area will do).
- Wooden beam.
- Grease in the spray can (type "VD-40").
- White spirit and a piece of rag.
- Soap solution (any detergent).
- Puller.
The latter tool is especially important in the course of work. Without it, replacing the rear silent block of the rear beam will be difficult, and possibly an impossible task. Some make pullers with their own hands, others use a hammer and other devices. But experts recommend not wasting time and buying at least the simplest beam remover. Its cost is about 400 rubles.
Getting to work
How to replace the silent block rear beam? First you need to install the car in first gear or put stops under the wheels. Next, remove the rear wheel from the necessary side and disconnect the draft of the brake force regulator (in common people “sorcerer”). It is located on the right side of the beam. We also remove the parking brake cable to the side. If the nuts are poorly unscrewed, lubricate their VD-40. If this does not help, we use another method. Slightly tighten the nut, and then twist it counterclockwise. And so on until all the dirt comes out of the thread. It is important to clean this place of rust and deposits - the slightest grain of sand will interfere with our work.
How to replace the rear silent block of the rear beam? At the next stage, unscrew the nut of the beam fastener to the bracket. Weaken the bolt and knock it out with the knob. With the help of a jack, we raise the body even higher and take down the eye of the beam. We insert a wooden block between it and the body. Next, take the puller and press out the old silent block. Sometimes it wears out so much that it comes out without any tools, with the effort of a finger.
Installation
When installing, it is worthwhile to thoroughly clean the seat from dirt and dust. To do this, use white spirit or another solvent soaked in rags. Lubricate the area with soap and water. Further (with the same puller) we evenly press in the new silent block. When installing, try to avoid distortions. Otherwise, you will damage the new item. At the next stage, we take out a wooden block from under the body and put on a beam fastening bolt, and also bait a nut. Install the rear wheel back and lower the car from the jack.
Next, go to the neighboring side - all the suspension elements, as well as the brakes change in pairs. Then we leave for a small test drive. After five to ten kilometers, we drive the car into the back garage and hold out the mounting bolts all the way. Then you can safely proceed to everyday operation.
What is the price for the silent block rear beam?
The cost depends on the type of product (rubber or polyurethane), as well as on the brand of car. So, silent blocks on VAZ can be purchased for 400-1100 rubles. For foreign cars, the price is from one and a half thousand and above (polyurethane is often not available - only the original).
Finally
So, we found out how to replace the rear silent block of the rear beam. All work can be done independently in 1-1.5 hours. Among the special tools, be sure to prepare a puller - without it, you simply damage the new silent block, even if hammer blows are made through some kind of damper (wooden beam).