Causes of car vibration

When your car vibrates while driving, don't panic, master some of the causes below to avoid being "bullied" by auto garages.

Buying a used car at this time may be a good option as the tax on new cars in Vietnam is still very high and constantly fluctuating. However, buying a used car means you have to be prepared to experience the usual car problems. One common problem is the shaking when driving.

There are top 5 reasons behind this shaking:

Engine problems

Sometimes you hear a vibrating noise coming from the engine compartment. This is because the engine is not getting enough air, fuel or spark to run smoothly.

Symptoms that indicate engine problems:

1. The vehicle vibrates or jerks when accelerating.

2. Shake in intermittent bursts within a specific speed range.

3. The car starts and runs fine for a while and then starts shaking.

4. Strange vibrations can be a sign of engine failure.

These symptoms may signal that it's time for a new set of spark plugs. If the spark plugs are still good, you may need to check the spark plug wires to make sure they are connected in the correct order or replace them if they are damaged.

Eventually a dirty air filter or clogged fuel filter can starve the engine of air and fuel, so you should replace these parts at the manufacturer's recommended intervals.

Problem with axle

A car is a unified system of many parts that move linearly and rotaryly within a certain range of measurements and tolerances to ensure smooth operation. If an axle is bent, the risk of a collision is easy to occur. When there is a problem with the axle, the car will vibrate according to the speed you drive. The higher the speed, the more the car vibrates.

Another relevant part to check is the drive shaft. The drive shaft is responsible for quickly transferring some of the power to the rear axle and wheels in a rear-wheel drive system. If the drive shaft is deformed, vibration will naturally occur.

Wear on the synchronizer joint is also a cause of abnormal phenomena. If the rubber covering that surrounds the outside of the steering shaft head in a pleated form is intact, the clamp is secure and there is no lubricant leaking, you can rest assured that there is no problem. But if the covering is torn, dirt can easily penetrate and damage the joints. For front-wheel-drive cars, a damaged synchronizer joint also means you need to buy a new steering shaft.

Brake problem

Uneven axles can cause a lot of vibrations, but the bad vibrations only really appear and increase with the intensity of brake use. If so, there is a high chance that your car has one or more warped brake discs. The most recognizable sign of this phenomenon is when the brake feels a sudden vibration, a jerk. When the brake pedal is pressed, the brake pedal vibrates and bounces slightly. The greater the pressure, the more the pedal vibrates. At that time, the driver feels the steering wheel vibrate.

The brake disc is a shiny silver part that is easily recognizable in the vehicle's disc brake system. The working conditions of the brake disc and brake pads are extremely harsh: the surface is covered with many impurities, high temperature and sudden changes, so it is easy to cause deformation and uneven wear. Research shows that the phenomenon of the vehicle's wheel slipping and shaking is due to brake wear or cracking, which seriously reduces braking performance.

Basically, the wear and tear effects do not affect all brake discs and the deformation occurs unevenly. The warped brake disc is lifted and lowered on one part of the surface. The disc brake seat and brake pad cannot function on the deformed brake disc. And thus, vibration occurs.

If you cannot fix it yourself with a wrench, you need to find a professional repairman to know the condition of the brake disc or brake drum.

wobbly wheel

Typically, you will feel the vibration directly through the steering wheel. Car experts advise not just looking in the cockpit, but also assessing the problem from underneath the car.

One or more wheels may be overworking and wobbling from the center. Diagnosing and treating this problem can be tricky because it can have many hidden problems. The solution to wheel wobble is to replace the bearings. On most modern vehicles, bearings are there to last the life of the vehicle. If you expose your vehicle to more severe conditions than normal, such as off-road driving, the bearings will wear out quickly.

One thing to watch out for is eccentricity. This is a term that describes how much the wheel deviates from its perfect circular path when subjected to centrifugal force. Technicians will use a sophisticated measuring instrument to determine how much the wheel deviates from its path. If the result is more than 1.5cm, the wheel needs to be replaced.

In addition, wheel wobble is also caused by the tie rod and cardan joint being worn at high speed for a long time and causing vibration.

Tire problems

Tires contribute to vehicle vibration in a number of ways. Here are the most common:

1. Vehicle vibration at certain speeds requires tire balancing.

2. The tire has a peeling rubber layer on the surface, you need to replace the tire.

3. Uneven tire wear requires periodic tire rotation.

4. Uneven tire rotation and rolling require replacement.

According to VNN