Car is shaking, which part should be checked?

1. Engine and steering problems

One of the most common causes of car vibration is engine and steering problems. Common causes include insufficient air (oxygen) or fuel supply to the engine, or a malfunctioning ignition system.

Vehicle vibration is caused by the following engine phenomena: the car engine loses power or stalls when accelerating; the vehicle passes the deceleration line at a certain speed; the vehicle runs stably at first and begins to vibrate a lot after long-term operation.

2. Faulty brake system

Frequent sudden braking increases friction and wear, which exceeds the brake disc's ability to handle. As a result, the brake disc will deform, with some parts rising and some parts falling... When the brake disc is deformed, the brake calipers and brake pads cannot tighten the brake discs to stop the vehicle, causing the vehicle to vibrate.

In this case, you should take the car to the center, the repairman will remove the brake disc or drum to clean and straighten it if the disc is warped.

In case of uneven disc wear, a lathe should be used to remove the outer layer, making the surface flatter and smoother, reducing vibration and making the brakes more effective.

3. Loose, unbalanced wheels and bent bearings

Loose or uneven wheel alignment will cause the vehicle to vibrate most strongly at the steering wheel. Check and tighten all the wheels with the hubcaps.

Car vibration can also be caused by damaged wheel bearings; bearings are very durable parts, but when impacted strongly or hit by hard objects, they can break or wear out, causing the car to "shake" up and down; if left for a long time, the bearings will become more and more damaged, which is very dangerous for the driver.

If the car vibrates at a certain speed, the tires should be re-aligned. If the tires are worn, replace them. If the tires are worn unevenly, rotate the tires. Check the roundness of the tires. If the tires are not completely round, check the pressure or replace the tires.

4. The car axle is faulty

When there is a problem with the car's driveshaft, the car will vibrate according to the driving speed, the higher the speed, the more the car vibrates. Driveshaft failure is common in vehicles using rear-wheel drive and four-wheel drive systems. When driving over rough terrain, due to the driveshaft being impacted, warped or worn, the car will vibrate at increasing speed.

When the propeller shaft is faulty, the first thing to do is to replace the crosshead bearing. If the vibration does not go away, the propeller shaft must be replaced with a new one... If the synchronizer joint cover at the end of the propeller shaft is torn or comes off, mud and dirt will stick to the moving joints, causing the joints to jam and vibrate.

5. The machine base bolt is damaged.

When the engine base bolt is loose or broken, the engine still starts easily, nothing is heard at low speed, but when going up to high speed, there is a rattling sound, the engine vibrates a lot if running at a speed greater than 40km/h. Check the engine base bolt again, tighten it or add new bolts.