Why does the car shake? The reasons


Vibration in a car is a common occurrence. While driving, a little shaking is inevitable. It is natural for any operating engine. Except for the F-1 racing cars. And the older the car, the stronger it feels. An attempt to gain high speed on a dirt road also leads to strong shaking in the cabin. These are all natural reasons for this effect.

Another thing is when the vibration appeared suddenly. For example, idling or accelerating. What could be the reason for the shaking of the car? And what can a motorist do to fix the problem? Consider three common situations:

  • during acceleration, the steering wheel jerks;
  • at idle, the engine vibrates strongly;
  • when picking up speed, the car shakes.

If vibration increases while driving, then you need to pay attention to the elements of the transmission, chassis and steering.

Steering wheel vibration

Why does the car shake? The reasons

Steering wheel vibration cannot be ignored. Otherwise, it is fraught with an accident. The steering wheel, like a litmus test, is the first to indicate a malfunction of the machine control system. Here are the common reasons for this problem.

  • Wheel imbalance. Balancing is needed so that each wheel rotates smoothly, without shifting the center of gravity. Usually this problem is felt on a flat road and at high speeds.
  • Custom rim size. When a motorist selects new discs, it is extremely important to pay attention to the bolt pattern. For example, a value of 4x98 indicates 4 bolt holes and the distance between their centers is 98 mm. Some people think that a few millimeters will not affect ride quality. In fact, to install the disc, you will need to tighten the bolts at an angle. As a result, the wheel is offset. And at high speed, the shaking becomes stronger.
Why does the car shake? The reasons
  • Worn shock absorbers or struts. The impaired smoothness of the shock absorber is also transmitted to the steering wheel. The old suspension elements become more rigid. Therefore, each unevenness feels like a large pit.
Why does the car shake? The reasons
  • The thrust bearing has failed. Due to the poor quality of the road surface, this suspension element quickly fails. If you do not make its timely replacement, it will negatively affect the serviceability of the entire car's depreciation system.
Why does the car shake? The reasons
  • Defective ball joints. Most often, they become unusable due to the operation of the vehicle on bad roads. Therefore, on the territory of the post-Soviet space, the ball must be changed more often.
Why does the car shake? The reasons
  • Tie rod ends. If even a slight play appears when turning the steering wheel, it is necessary to replace the tie rod ends. They provide parallel rotation of the front wheels. At high speeds, worn tips are stressed by the uneven wheel alignment.
Why does the car shake? The reasons

Here's another reason for steering vibration:

What to do - the steering wheel beats, the car trembles? Balancing didn't help ...

Shakes the car at idle

If the car vibrates when the engine is idling, then the problem must be sought in the internal combustion engine mounting elements. To eliminate it, you should pay attention to the following possible causes.

  • Worn engine mount. During operation of the power unit, vibration is compensated by the rubber mount pads. The problem will not necessarily be that the part has torn. Rubber elements get rough over time. Therefore, they need periodic replacement.
Why does the car shake? The reasons
  • Motor malfunction. Idling of the piston group should be as smooth as possible. If this does not happen, you need to take the car to a minder. Some of the reasons for the lack of smoothness are pinched valves, or worn piston rings.
Why does the car shake? The reasons
  • Fuel system problem. A clogged fuel system leads to uneven operation of the internal combustion engine. If at idle speed the engine picks up and then slows down, it is worth checking the entire line. Replacing the fuel filter or repairing the pump can stabilize the operation of the engine.
Why does the car shake? The reasons

To diagnose malfunctions on atmospheric internal combustion engines, you can use the recommendations of Nail Poroshin:

"Sausage" at idle or "Excess" air

The car shakes when accelerating

In addition to the listed malfunctions, shaking during acceleration can be attributed to a transmission malfunction. Here are three common shaking problems.

  • Oil level in the box. A low level of transmission lubrication leads to failures in the acceleration of the car. Usually this problem is accompanied by the noise of gears rubbing against each other.
Why does the car shake? The reasons
  • Automatic box filter. A clogged filter element reduces the circulation of lubricant in the automatic transmission. This creates the sensation associated with a low transmission fluid level.
Why does the car shake? The reasons
  • Cardan joint malfunction. In the nodes connecting the shafts at an angle, a hinge of unequal angular velocities is installed. Even a slight backlash in the moving parts of the part leads to vibration at speed.
Why does the car shake? The reasons

An example of how to diagnose a malfunction of the transmission and chassis of a car:

Vibration when picking up speed. What is the reason? How is it diagnosed? | Video lecture # 2

As you can see, vibration in the car can cause various malfunctions. Therefore, it is extremely important to carry out the necessary maintenance of the machine on time. Replacing worn parts will not only eliminate discomfort during the trip, but also prevent an emergency.



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1 comment

  1. It seems that it was translated with Google translate. Nothing is understood.

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