General information about the chassis of the VAZ 2108 / VAZ 2109 / VAZ 21099

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Repair of rear suspension components

Replacing the rear suspension beam

Sometimes there is a need to replace the rear suspension beam of a VAZ 2108 car. This may be after an accident, an unsuccessful trip on a bad road, hitting a curb or bump, which can lead to deformations and violations of the general characteristics of the rear suspension elements of the car. So:

• To carry out work on replacing the rear suspension beam, the rear part of the car must be suspended and freed from the total weight so that the beam is in a free state.
• All attachments are removed - the fixation of the rear shock absorbers, hoses and brake pipes, and the ends of the handbrake cables are disconnected.
• The pressure regulator earring is disconnected from the bracket located on the suspension beam.
• The nuts holding the bolts attached to the brackets of the lower part of the shock absorbers are unscrewed, after which the latter are moved to the sides.
• The last stage is to unscrew the bolts fastening to the bracket of the beam itself.
• After removal from the vehicle, all elements are subject to visual inspection. If necessary, they are restored or replaced with new ones.
• Assembly of the unit is performed in the reverse order of disassembly.

Replacing the rear wheel bearing of a VAZ 2108 car

When there is play in the wheel, which can be easily determined when driving, there is noise from behind the car, a knock. If there is a small gap, you can try to tighten the hub nut. This will slightly prolong the use of the bearing, but to completely eliminate the problem, it must be replaced. So:

• To work, in addition to the tool, you will need a hub puller, a mandrel to knock out the old bearing race, or a piece of pipe of the required diameter.
• The side of the car being repaired is raised. The wheel unscrews.
• The brake pads and drum are removed.
• Using a small piece of pipe as a lever, the hub nut is unscrewed and removed along with the thrust washer.
• The hub is removed from the axle using a special puller.
• Next, the failed bearing is replaced.
• The hub is clamped in a vice, from which the retaining ring is removed.
• The old bearing is removed using a puller or mandrel.
• The hub is washed with clean gasoline, lubricated with lithol and a new element is pressed into it.
• A new retaining ring is installed.
• The brake mechanism is assembled, the wheel is screwed into place, and the car is lowered to the ground.
• The tightening of the hub nut is adjusted, which then needs to be locked.

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If you find an error or want to supplement the article, select that part of the article text that needs editing and press Ctrl+Enter. Next, follow the simple instructions. New topicReply Features of the design of the front suspension Repair and operation manual – Chassis – Features of the design of the front suspension The front suspension of the VAZ 2108, VAZ 2109, VAZ 21099 cars is independent, telescopic, with hydraulic shock absorber struts, coil springs, lower wishbones with braces and a stabilizer bar . The main element of the front suspension of the VAZ 2108, VAZ 2109, VAZ 21099 is the telescopic hydraulic shock absorber strut 1 (Fig. 6.1), the lower part of the shock absorber strut is connected to the steering knuckle 5 with two bolts. The upper bolt 3, passing through the oval hole of the front shock absorber strut bracket, has an eccentric collar and a washer. Turning the top bolt changes the camber of the front wheel. The following are installed on the telescopic strut: a coil spring 17, a polyurethane foam buffer 19 for the compression stroke, an upper support 22 of the front strut assembled with a bearing 21. The upper support of the front strut is attached with three self-locking nuts to the mudguard strut of the car body of the VAZ 2108, VAZ 2109, VAZ 21099. Due to its elasticity, the support ensures that the front strut swings during suspension movements and dampens high-frequency vibrations. A bearing mounted in the upper support allows the front strut to rotate along with the steered wheels. Parts of a telescopic hydraulic shock absorber, shown in Fig. 1, are mounted in the strut housing. 6.2. A hydraulic recoil stroke buffer is installed in the upper part of the cylinder, consisting of a plunger 15 and a spring 16. It limits the movement of the rod during the recoil stroke. The lower part of the steering knuckle 5 (see Fig. 6.1) is connected by a ball joint 10 to the lower suspension arm 9. Braking and traction forces are perceived by longitudinal braces, which are connected through rubber-metal hinges to the lower arms and front cross member supports of the front suspension. At the junction of the brace with the lever and the front support, adjusting washers are installed, which change the angle of the longitudinal inclination of the steering axis. A closed-type double-row angular contact bearing is mounted in the steering knuckle (Fig. 6.3); wheel hub 4 is mounted with interference on the inner rings of the angular contact bearing. The thrust bearing is tightened with nut 6 on the shank of the outer wheel drive joint housing and is not adjustable. All front and rear wheel hub nuts are the same and have right-hand threads. The anti-roll bar on cars VAZ 2108, VAZ 2109, VAZ 21099 is a bar, the knees of which are connected to the lower suspension arms through struts with rubber and rubber-metal hinges. The middle (torsion) part of the rod is attached to the body with brackets through rubber pads. USEFUL TIPS When swinging the suspended front wheel, it is difficult to discern play in the hub bearings and ball joints. Ask an assistant to press the brake pedal, and if you feel any play, the ball joints are faulty and the ball joints should be replaced. Install wheel bearing caps with any adhesive and you will avoid many problems in the future. Rice. 6.1. Front suspension of VAZ 2108, VAZ 2109, VAZ 21099 assembled:

A control size;
1 – telescopic stand; 2 – nut; 3 – eccentric bolt; 4 – nut; 5 – steering knuckle; 6 – front wheel drive shaft; 7 – protective cover of the hinge; 8 – external shaft joint; 9 – lower lever; 10 – ball joint; 11 – decorative disk (cap) of the wheel; 12 – hub; 13 – brake disc; 14 – protective casing; 15 – rotary lever; 16 – lower support cup; 17 – suspension spring; 18 – protective cover of the telescopic stand; 19 – compression stroke buffer; 20 – upper support cup; 21 – upper support bearing; 22 – upper support of the rack. Rice.
6.2. Telescopic strut of the front suspension of a VAZ 2108, VAZ 2109, VAZ 21099: 1 – compression valve body;
2 – compression valve discs; 3 – throttle disk of the compression valve; 4 – compression valve plate; 5 – compression valve spring; 6 – compression valve cage; 7 – recoil valve nut; 8 – recoil valve spring; 9 - recoil valve plate; 10 - recoil valve disc; 11 - throttle disk of the recoil valve; 12 – piston; 13 – bypass valve plate; 14 – bypass valve spring; 15 – plunger; 16 – plunger spring; 17 – rod guide bushing with a fluoroplastic layer; 18 - guide bushing; 19 – sealing ring of the rack housing; 20 – rod seal; 21 – oil seal cage; 22 – gasket of the rod protective ring; 23 – rod protective ring; 24 – nut of the strut body; 25 – compression buffer support; 26 – rod; 27 – spring cup; 28 – rotary lever; 29 – rod limit sleeve; 30 – rack body; 31 – cylinder; 32 – drain tube. Rice.
6.3. Steering knuckle and parts of the front wheel hub of VAZ 2108, VAZ 2109, VAZ 21099: 1 – steering knuckle; 2 – outer mud ring; 3 – hub bearing; 4 – wheel hub; 5 – thrust washer; 6 – nut; 7 – retaining rings; 8 – internal dirt-reflecting ring. Quote

Characteristics and components of the front suspension on the VAZ 2108[/caption]The front suspension of the VAZ 2108 allows the vehicle to move smoothly when driving on an uneven road surface. What is the VAZ 2108 suspension, how is it repaired and how can its characteristics be improved? The VAZ 2108 has been known on the Russian market for more than two decades. This front-wheel drive, dynamic, quite practical car, which appeared on the sales scene in the late 80s, today also occupies one of the top levels of the rating.

And now the VAZ 2108 or, as this car is popularly called, the “eight” is in wide demand and respect among motorists. Over the years of working on the model, AvtoVAZ has released a huge number of modifications: from simple and cheap to modified, improved, more powerful and functional.

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Features of the front suspension device

It is independent, telescopic, MacPherson type, with shock-absorbing struts consisting of hydraulic shock absorbers and springs. The suspension is complemented by an anti-roll bar. Unlike the rear suspension, the front suspension is much more complex. This is explained by the fact that the car has front-wheel drive, but there are very few parts and components. In addition to shock absorber struts and a stabilizer, these are stretch marks and a steering knuckle, as well as levers for attaching to the body and transmission.

The chassis of the VAZ 2108 is identical to many front-wheel drive budget cars. The main element of the front suspension is a strut with a hydraulic shock absorber and a twisted metal spring. At the top, a support bearing is installed in the body shell, which smooths out vibrations and prevents the rack from rolling. It also ensures that the stand rotates synchronously with the front wheels during various maneuvers.

The steering knuckle is complemented by a ball joint, which provides communication with the lower suspension arms. Stretching with silent blocks serves to compensate for forces. A wheel hub is installed in the steering knuckle on a double-row bearing, and a single bolt is used to secure the hub. The stabilizer is also connected to the levers using silent blocks.

Suspension selection

The main rule when selecting any spare parts is quality and reliability. The suspension performs important functions, and not only comfort, but also vehicle handling depends on the choice of spare parts. Properly selected, it should serve its purpose equally well in any conditions and on any road surface. Ultimately, suspension affects safety.

The VAZ 2108 car has a relatively light weight, and therefore (if you are not planning races on the track) you should not choose too stiff a suspension. The optimal solution as an alternative to the standard one can be called the VAZ-KW and some similar settings. Their main advantage is the ability to smooth out vibrations of the body equally well at any speed. In addition, the components and parts are distinguished by their reliability and high performance characteristics.

When choosing a suspension, you should consider the following nuances.

1. For a smoother ride, you should take a soft one. The parts must be identical to the factory ones so as not to interfere with other components of the car. When making turns, the car should not roll, and when going over bumps, smooth them out and return the car to its starting position.
2. Wheel and body vibrations, as well as vibrations, should be greatly reduced.
3. The force from the drive wheels on the frame must be correct and uniform.
4. The overall weight of the suspension is not too large so that excess load is not transferred to the body.
5. The parts must have a good margin of safety, so they will last much longer.

In addition, the suspension must be selected taking into account the use of the vehicle. For lovers of measured movement and quiet driving, you need one type. For adherents of an aggressive driving style, another one will be suitable.

Difficulties in replacing suspension

In general, this is not considered a complex process. Car enthusiasts will not have to deal with making homemade components. Parts for tuning are available in stores in huge quantities.

When choosing a pendant, you should also take into account such an important factor as cost. Installing an independent node will cost at least twice as much as a standard one. However, by paying more, you can get improved handling and stability of the car. One of the universal solutions could be a semi-independent chassis, which in its characteristics is similar to an independent one, but is in many ways superior to the standard one.

For aggressive driving and high speed, you should not install too soft a suspension. Otherwise, on sharp turns the car will roll heavily and lose control, which can ultimately lead to a serious accident. If serious tuning is planned, almost all standard parts will have to be replaced.

You should start by replacing the stabilizers: the standard ones will not cope with the load, so it is better to purchase a stabilizer from a VAZ 2110. It should be taken into account that you will have to change the shock absorber struts along with them. It is also better to change the shock absorbers; for efficient operation it is recommended to use gas ones. For greater stability, a spacer under the hood between the front pillars will not hurt.

Even such a minimal set of modernization will have a positive effect: rigidity will increase, and handling will noticeably improve. The car will hold the road better when cornering, and roll will be reduced even at high speed. For further tuning, you will need to install stiffer springs, this will also have a positive effect on handling, and the ground clearance will increase slightly. To reduce ground clearance, you will have to additionally buy shortened shock absorbers. Cutting springs into several turns to lower them is highly not recommended, as the consequences can be unpredictable. Even with factory shortened springs, you need to understand that the suspension will perform somewhat worse.

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Scheme

The diagram below will allow you to determine what components the assembly is divided into and what it represents in the assembly. The table will help you figure out where each suspension element is located.

Node diagram

Bottom view

It is not enough just to know the name and location of the suspension elements. Be sure to understand how the entire system works and how all the components interact with each other.

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Technical characteristics of VAZ 2108

Work on the VAZ 2108 began in the early eighties. The car turned out to be original, smart, fast. The slightly elongated hatchback body evoked extremely positive emotions. Here elegance was perfectly combined with simplicity, dynamism with practicality. In addition, like all cars of the Russian concern, the VAZ 2108 was offered at an affordable price. The repairability of the model is also considered one of its positive properties.

In 1993, manufacturers decided to improve the technical part and updated the line of engines. If previously only a 1.3-liter gasoline engine was offered, now, in addition to it, there were 1.1 and 1.5-liter gasoline units equipped with different fuel injection systems. The engines operated with front-wheel drive, which was new on the Russian market at that time, and a standard manual transmission.

The car's suspension is mediocre; it doesn't filter out road irregularities very well, and if you drive on an imperfect track at a decent speed, the sensations won't be the most positive. In addition, the front suspension of the VAZ, as well as the rear, often fails. Fortunately, it is quite possible to carry out repairs yourself.