Adjusting the camber. Do-it-yourself alignment

It will not be news to anyone that an incorrectly adjusted wheel alignment can lead not only to a deterioration in the quality of the tire, but also to high fuel consumption. That is why it is worth approaching the camber alignment responsibly.

Setting up the wheel alignment on your own is not at all difficult, as it might seem at first. We will try to consider this issue in detail and give the best advice to new mechanics. Stabilization of a pair of steering wheels is the most important aspect that affects the stability of the car on the road. What does it mean? The wheels should move in a straight line and, bypassing the turn, return to their original position.

Following from this, the urgent need for the wheel stabilization procedure is explained very simply. When the car is moving, the wheels, which are not stabilized, move to the side as a result of shocks from the road. Then the driver must return the wheels to the desired (straight) position. Considering that this happens constantly, the person driving gets more tired. In addition, the steering contacts wear out faster. And with increasing speed, the growing instability becomes unsafe.

What determines the stabilization of steered wheels? The answer is simple: from their alignment or collapse. alignment can be adjusted in auto repair shops, but it is quite possible to solve this problem yourself .

What is wheel alignment

Wheel camber.

The camber of automobile wheels is considered to be the angle between the vertical rotation of the wheel and its plane.

There are two types of camber: positive - the top of the car wheel is directed outward; and negative - here the direction of the upper part of the wheel inward is suggested.

Wheel alignment.

Wheel toe is considered to be the angle between the direction of movement and its rotation (the plane of the wheel). Typically, the toe-in of car wheels is determined immediately for the entire axle (that is, two wheels at the same time) using calculations in millimeters. However, some practice such measurements in degrees/minutes.

Sign 6: “tight” steering wheel

If you need to exert force to turn the steering wheel, this may indicate that the camber angle is too large. In this case, the car may not “drive”, and there will not even be uneven wear.

Other possible causes of the problem:

• low air pressure in tires - less than 1.2 atmospheres;
• the steering rack or pendulum arm is overtightened;
• tight steering rods or ball joints are installed - they will gradually “develop” themselves;
• The tire width is greater than the width recommended by the manufacturer.

What to do: Check the air pressure in your tires. Check the condition of the steering rack and pendulum arm - if they are too tight, you need to loosen them yourself or at a service station. Measure the width of the tires, compare it with the recommended parameters - if it is larger, replace the tires. If all else fails, have your wheel alignment adjusted at a service station.

What is wheel alignment

The wheels of the car must be positioned relative to the horizontal plane at a certain angle (camber), the same applies to the vertical plane (toe). This is required to achieve better tire traction and acceptable vehicle handling.

Correct setting of camber and toe angles ensures stable handling and stability of the vehicle

Convergence

This value can be either “plus” (when imaginary lines running parallel to the drive wheels will have an intersection point in front of the “nose” of the vehicle) or “minus” (when the intersection point is located behind). You need to understand that the closer the toe angle is to zero, the less resistance the vehicle has to the rolling effect.

A negative toe angle is bad. In this case, poor handling and poor response when turning the steering wheel will be observed. In addition, this will lead to the car yaw during travel (especially at high speed). The risk of an uncontrolled skid will increase significantly.

With “positive” toe-in of the front wheels, the vehicle is more responsive in handling, and it will be easier for the car enthusiast to take turns. It is also recommended to install the wheels of the rear axle with a positive toe value, then the car will become as stable as possible when driving straight.

If the convergence angles strongly differ from the factory settings, increased tire wear is observed:

• If positive - on its outer part;
• When negative – internal surfaces.

Therefore, it is not recommended to experiment with this angle.

Camber

Camber is the angle between an imaginary vertical plane and the lateral plane of the wheel. If the upper parts of the wheels “look” towards the center of the car, the camber angle is considered negative, and if outward, then positive. A significant discrepancy between the camber angles and the parameters set by the manufacturer will lead to rapid tire wear. Moreover, the car will begin to “drag” towards the wheel that has the maximum camber angle.

Custer

The behavior of a vehicle while driving is influenced by caster - the angle between an imaginary vertical and the axis of rotation of the wheels while turning the steering wheel.

Its meaning can have both positive and negative meanings. Because of this angle, the drive wheels will invariably return to their original (neutral) position. Its value determines the change in wheel camber when turning the steering wheel and the stabilization of the car while moving along an arc trajectory. The higher this value, the greater the stabilizing effect.

Caster angle - deviation of the angle of the longitudinal axis from an imaginary vertical line

The camber and toe angles should be constantly monitored, but the caster is set by the manufacturer during the development of the vehicle, and in most cases there is no need to change it.

It is important that the angles are the same on both sides of the vehicle. Otherwise, the car may behave unpredictably on the road - the car will “steer” to one side

When and why do you need it

Manufacturers recommend that owners of foreign cars carry out the procedure every 30,000 km, and owners of domestic cars - every 15,000 km. The period may be reduced if the car is operated in difficult conditions and often drives on bad roads. In some cases, an unscheduled procedure may be required:

• if the disc is crushed when entering a hole at high speed;
• if the chassis was repaired;
• if shortened springs were installed on the car or the ground clearance was changed for other reasons, auto buffers were installed;
• if when driving you clearly feel the car “pulling” to the side;
• if the tires begin to wear out much faster;
• if the steering wheel does not return well after negotiating a turn.

What will you get from the wheel alignment results?

1. The directional stability of the car will improve. When driving in a straight line, the vehicle will move only forward, without moving to the side.
2. The car will become more maneuverable, strong drifts will disappear, and control will be simplified.
3. Fuel consumption will be reduced and tire service life will increase.

Depending on the purpose, one or another type of wheel camber can be selected

How to adjust camber and toe on a VAZ-2107 with your own hands.

In order to set the camber and toe angles on your car without resorting to the services of a specialist, you will need the following tools:

• - standard set of wrenches;
• — sliding pliers;
• - caliper;
• — block 22 mm thick;
• — block 6 mm thick;
• - the twine is not long;
• - long string, with hooks at both ends.

Before you begin adjusting the wheels, the car should be prepared. Necessary:

• — install it on a level surface;
• — check the atmospheric pressure in all wheels;
• — remove the decorative caps from the disks;
• — provide a vehicle load of about 320 kg. The load must be distributed evenly. For example, you can simulate the presence of four passengers in all seats and an additional load weighing 50 kg in the trunk of a car.
• — check the fuel tank. The car must be fully fueled.

Now you need to check how much the camber angle differs from the standard one. To do this, you should align the wheels strictly straight, and then “squeeze” the front and rear suspension several times with a force of about 50 kg.

Next you need to tie a short string vertically, as shown in the figure:

Its adjustment is made using a bolt with an eccentric on the stand. You need to loosen its nut and adjust the degree with the bolt. The tension of the second knuckle bolt is released symmetrically.

To check the toe angle, you should take a long string with hooks. One end needs to hook it on the front plane of the front wheel, and the other on the opposite, rear plane of the rear wheel. The string must be stretched evenly, that is, the wheels should be perfectly aligned before taking measurements.

The design of the VAZ-2107 is such that the track of its rear wheels is somewhat narrower than the front. When the string is stretched, this is very clearly visible. It should be tensioned so that, with the front wheels standing level, it touches the rubber by 1-2 mm in two places, and is in the air at the back. This void must be compensated by placing a 22 mm thick block under the twine. Then you need to place a 6 mm block and check whether the string continues to touch both points of the front wheel. If not, then the toe needs to be adjusted.

To do this, it is necessary to loosen the coupling clamps on the outer tie rod; then use sliding pliers to rotate the coupling until the string touches two points on the tire at the same time. Having achieved the result, you need to carefully tighten the loose clamps of this coupling.

The exact same procedure is carried out with the opposite pair of wheels.

This table shows the required degrees of camber, toe and caster.

*The ideal figures for an unloaded vehicle are given in parentheses.

It is not at all difficult to set the desired degree of camber and toe of wheels on a VAZ-2107 at home. In order to see the process with your own eyes, you can watch a video that shows in detail the entire procedure for adjusting the position of the wheels.

Sign 1: Diagonal dent in the tread

A diagonal dent in the tire tread is a sign of improper wheel alignment, which few people know about. It is typical for the rear wheels of front-wheel drive cars. A dent appears due to uneven distribution of load on the tire, especially if the car often carries cargo - for example, if you often transport vegetables from the dacha or transport passengers with luggage.

Other possible causes of the problem:

• insufficient wheel rotation interval;
• transportation of goods in the cabin or trunk, as a result of which the suspension geometry changes.

What to do: if you often transport cargo, there is a risk of suspension failure - have it checked at a service station. If you drive alone, together, or have recently checked your suspension, most likely the cause is wheel alignment: check it yourself or at a service station.

Basic parameters for installing wheels

If a motorist needs to do a wheel alignment with his own hands, he first needs to determine those connections in the suspension that affect the change in tire orientation. Many work on replacing suspension parts involves subsequent adjustment of the wheel alignment. For example, replacing a ball joint, steering rods and ends, and a shock absorber cannot be done without at least a simple check of the main dimensions. Then you will be able to save the tires until your next visit to the service station.

You should not install wheel angles if there are faults in the car’s suspension. Only after replacing all damaged parts and assemblies can you begin to adjust the wheel alignment.

Wheel alignment indicators

Camber and toe are two different parameters.

1. Camber is usually called the angle connecting the plane of rotation of the wheel and its vertical. Positive camber occurs when the top of the wheel protrudes outward relative to the bottom. With negative camber, the top points towards the inside of the car.
2. Wheel toe is the angle that connects the plane of rotation of the wheel and the direction of its movement. With correct toe-in, the wheels are parallel or the front of the wheel is slightly turned inward of the car.

What operations can you do yourself?

The only operation that cannot be done correctly on your own is fine adjustment of the castor. If the accident has not changed the geometry of the body, then symptomatic adjustment of the castor can be done. When the car does not listen well to the steering wheel, turns unsteadily and with a delay, you just need to increase the caster for 20–40 minutes. If, during sharp acceleration, the steering wheel begins to be pulled out of your hands, the castor needs to be reduced. It must be remembered that an increase in castor leads to an increase in wheel camber. You can also adjust the wheel alignment yourself. If the body is damaged as a result of an accident, which led to a violation of its geometry, then any adjustment of the suspension is pointless. You will spend a lot of time, and the result will be extremely doubtful. Therefore, after even a minor accident, be sure to check the body geometry on a special stand.

Wheel alignment technology

The adjustment occurs in two stages. First you need to set the camber angle, and then adjust the toe.

Setting the Camber Angle

To set the camber angle with your own hands, you need to install the car on a flat platform (preferably with an inspection hole), prepare accessories such as a ruler, a plumb line and chalk.

The technology for adjusting wheel camber is as follows.

1. First, the wheels are aligned in a strictly straight direction.
2. Make two marks with chalk on the top and bottom of the tire.
3. A plumb cord is applied to the car fender, which should hang motionless parallel to the plane of the wheel.
4. Now you need to measure the distance from the cord to the rim of the disc. The difference in measurement should not exceed 3mm.
5. The next step is to move the car forward to rotate the marks at an angle of 90 degrees. After this, the measurement procedure is repeated. This will allow you to obtain more accurate arithmetic averages.
6. To adjust the camber, you need to remove the wheel, loosen the bolts securing the steering knuckle and shock absorber strut.
7. Now, depending on the measurement data, it is necessary to move the steering knuckle inward or outward.
8. After this, the bolts are tightened, the wheel is installed in place and a control measurement is carried out.

Thanks to these actions, it will be possible to achieve the correct camber of the wheel. For rear-wheel drive cars, errors are allowed within the range of +1...+3 mm, and for front-wheel drive cars this figure is limited to the range of -1...+1 mm.

Wheel alignment installation

To adjust the toe angle, a telescopic ruler is required. A prerequisite is the presence of a flat surface and the straight position of the wheels.

1. Work begins by placing chalk marks in the form of dots on the inside of both tires (front), close to the rim.
2. The telescopic ruler is installed so that its ends touch the points on the tires, but the measuring tool does not touch the machine parts. In this position, the ruler is fixed and a measurement is taken.
3. After this, the car rolls forward so that the telescopic device moves back without touching any suspension elements.
4. Now all that remains is to check the readings obtained and compare them with the measurement in the front part.
5. If the distance between the tires has decreased, the tie rods should be shortened. As the distance increases, it is necessary to lengthen the rods. To make adjustments, you must first loosen the locknuts located near the steering tips. After setting the toe angle, do not forget to tighten the nuts.

Carrying out simple adjustments with your own hands will allow you to approximately set the wheel alignment at home. If, after installing the wheels, the car pulls to one side while driving, bad “rolling” is observed, and the outer or inner side of the rubber wears out before your eyes, you should contact a service station for more precise adjustments.

Sign 4: the car pulls to the side

If you have to constantly control the steering wheel, do a little test. Accelerate to 20–40 km/h on a flat, empty road, position the steering wheel straight so that the car moves forward, and release it. If the car begins to “steer” to the left or right, this may indicate incorrect wheel alignment.

Other possible causes of the problem:

What to do: Check tire pressure, tread wear, suspension and bodywork. Test the power steering - if the steering wheel turns tighter than usual, or the steering wheel play has increased, replace the faulty valve. If everything is in order, the problem is the wheel alignment: have it adjusted at a service station.

Advice: you shouldn’t put different tires on your car - for example, use 2 wheels of different sizes from different manufacturers or put winter tires on the front axle and summer tires on the rear axle. This can lead to the car starting to “steer”, and handling especially worsens when cornering or when pulling onto the side of the road.

Another tip: each time you change shoes, mark the tires, for example, “LP” - left front. This way you won’t put tires on one axle that last season were put on one on the rear axle and the other on the front axle.

Sign 10: Loss of directional stability on rough roads

If the car pulls strongly to the side when it hits bumps, holes and other irregularities, this may be a sign of an incorrect wheel alignment angle. When a wheel hits an uneven surface, it “moves” towards the installation angle, so the car loses directional stability.

Other possible causes of the problem:

• failed steering parts;
• faulty shock absorbers.

What to do: go to a service station and check the shock absorbers, chassis and steering system. Or immediately diagnose the wheel alignment: if the shock absorbers and steering are in order, the reason lies there.