Vibration of the rudder at a speed of 90-100 km / h. Reasons and solutions

Quite often, the resulting malfunction of the car - the rudder vibration at a speed of 90-100 km per hour. At a low speed, everything can be fine. But with its increase, the steering wheel begins to "come to life" in the hands. And even when driving on a flat road. It often happens that this phenomenon appears gradually, from a small, hardly noticeable vibration to a real trembling, when not only the rudder walks, but also the column. Following it, the instrument panel and the interior trim are rattling so that it's impossible to go. It is worth noting that this problem appears not only on domestic cars, but also on many foreign cars. It is not an exception and commercial vehicles, for example, "Gazelle". When there is a vibration of the rudder at a speed of 90-100, the main causes can be very different. So, let's look at them in detail.

Improper balancing

Badly balanced wheels are the main reason why the rudder vibration appears at a speed of 90-100 km / h. Dirt or icy snow may stick to the disc, often with the inner, invisible side of the face. At a low speed, this additional load does not manifest itself. But with its increase, centrifugal force from the center of the wheel also grows. The imbalance will be significant, so the wheel starts to twitch, causing a vibration to fall on the steering wheel. Eliminate this problem by simply cleaning the wheel from the inside and outside.

Wheel imbalance

The cause of this phenomenon can be the defects of the rubber itself as a result of the impact on the obstacle or getting into the pit (often at high speed), which causes the elements of the carcass to deteriorate on the tire and it takes an irregular shape. Such a defect is called a "hernia". It is almost impossible to fix it, but you can try to correct the balancing of the wheel. But even in this case, the rudder will vibrate at a speed of 90-100. What to do in this situation? Such a tire will not work as it should, and will soon have to be changed.

Incorrect wheel alignment angles

The front wheels of the car are not parallel to each other. This is done to compensate for uneven wear under and without load. If the mounting angles are incorrect, the rubber "eats", which can also lead to the appearance of vibration. This is especially pronounced when the installation of one wheel is disturbed. In such situations, the rudder vibration at a speed of 90-100 km / h is particularly noticeable. It is simply impossible to go by this car.

Unfastened wheel bolts

Often, unfastened fastening of the disc causes the vibration of the rudder to appear at a speed of 90-100. The solution to this problem is extremely simple - to extend all the bolts (or nuts) on all wheels. And always tighten the crosswise. It is very important that the central disk snug against the hub. This phenomenon often occurs after tire fitting (replacement of tires).

Wear and damage of suspension elements

The suspension of the wheels includes a lot of hinge elements, each of which has its own definite service life. These are oil seals, silent blocks, ball bearings, bearings. All of them work within the limits of permissible backlashes, when exceeding which may appear including a rudder vibration at a speed of 90-100. Ways to eliminate this problem are very different: from diagnosis of the chassis to self-repair of the malfunction. Often they are complex and severely harm the chassis of the car. Since the suspension is in constant motion, the excess of backlash (for example, the ball joint) leads to a rapid spreading of the silent block of the lower arm of the suspension.

Bearing wear

This element ensures a smooth rotation of the wheel on the axis. Its long operation is ensured by the correct torque, at which it should be free to rotate without looseness. The bearing, which is not as tight as the over-stretched one, wears out quickly and starts to jam. Check it pretty easily. When the wheel is removed, it is necessary to unhook the pads and turn the brake disc by hand. If during the rotation of the latter, the resistance to rotation increases from time to time and an extraneous sound appears, then the bearing jams. Also it should disappear at some weakening of the nut holding the bearing. In this condition, it will not last long.

Cardan shaft as a cause of increased vibration

Sometimes it happens that in cars with full or rear-wheel drive there is a rudder vibration at a speed of 90-100. The main problems here are connected with the cardan shaft. It should be, like the wheels, balanced. When driving a car, the cardan element rotates faster than the wheels. Therefore, its imbalance is felt much more strongly. In addition to the shaft itself, hinges can contribute to the appearance of vibration. This is a cardan mechanism and an outboard bearing (shaft bearing). The knot itself can be balanced. And individual hinges, most likely, will be subject to replacement.

Worn engine mounts

The power unit is attached to the body through special supports, so-called cushions. With their wear, breakage or subsidence, the engine starts to swing more strongly during transient modes. This fault is not very noticeable during driving and manifests itself mostly at idle speed, although it can also contribute to the appearance of vibration.

Features of tires

Vibration of the rudder at a speed of 90-100 km / h is due to the use of special, highly specialized tires. A vivid example - tires for SUVs. These tires are soft, and the elements of the tread pattern are stiff and large. On the road it gives amazing coupling qualities. But when driving at high speed, this softness can lead to imbalance and vibration, as well as increased noise. Large pits when driving at speed with such tires are very dangerous.

Discrepancy of wheels to factory recommendations

The car's disc has its own parameters - width, landing diameter of the tire, overhang, as well as the diameter of the drilling, i.e., the circumference on which the holes for fixing bolts or studs are drilled. For each wheel model, indicate the number of these holes and their diameter. If the parameters of the disc are not correctly matched, the fastener does not spin to the end and does not tighten the wheel to the hub. As a result, the disc has a play. If there is a discrepancy in the diameter of the holes, the wheel also does not fit into its place. It, of course, can be planted with the help of physical strength. However, the plane of the disk will not coincide with the parameters of the hub. This is not good for a car.

Steering Malfunction

The increased vibration of the rudder at a speed of 90-100 km / h can be caused not only by malfunctions of the suspension and wheels, but also by the control itself. Broken tips, the steering gear and backlash in the cardan hinges of the column can also affect the appearance of vibration. This is also facilitated by worn-out steering column bearings and the rack itself. Though the reason can be banal - easing of a fixing nut of a wheel. The solution is to tighten the bolt.

Contact with foreign objects between the engine and its protection

Often in the gap between the steel (or plastic) sheet covering the engine from below, gets a stone, which, when the engine is stuck and transmits the vibration to the protection, and that - on the body. On idle, such an "intermediary" does not manifest himself at all, but at higher speeds and with traffic (often at a certain speed) can make itself felt.

Worn or distortion of brake discs

These elements are mounted on the hub and, when the speed is reduced, they are clamped by the pads. There is practically no gap between the disc and the pads. Therefore, the surface of the assembly must be perfectly even. At the slightest distortion of the disk, the rudder vibrates at a speed of 90-100 km / h. The crushing of brake elements occurs most often because of frequent and intensive braking, as well as when driving deep puddles. The heated disc is bent from abrupt cooling. Such an element is not subject to repair - only replacement.

Conclusion

So, we found out why the steering wheel vibrates at a speed of 90-100 kilometers per hour. Of course, it's good when the source of the problems is the pebble between the engine and the metal guard or the half-speeded wheel. But more often the vibration on the handlebars arises from more serious causes, the elimination of which can not be delayed. Remember that this often determines the safety of you and other road users.