The knock in the suspension on the bumps and irregularities of the road: the main causes

The appearance of various extraneous knocks from the suspension area may indicate malfunction of the lugs, steering rods, silent blocks and other elements of the chassis. The car owner should properly diagnose such malfunctions, timely contact the service, eliminating the existing breakdowns. Let’s talk in detail about what can knock in suspension when passing potholes and bumps. Well, if something in your car has long since stopped knocking and it’s standing there, covered in rust, then turn the car in for recycling:

Knock in suspension on a bump and roughness of the road: the main reasons

Wear of ball bearings
The appearance of a pronounced strong knock when passing deep bumps may indicate wear of the ball bearings. Check the condition of the suspension by pressing down on the ball joint with a crowbar. If pronounced play is noted, the ball bearings should be replaced. You should not ignore such defects and procrastinate applying to service, because in such a case the driving safety suffers. Worn ball joints can simply tear out while driving, fraught with the risk of dangerous road accidents.

Knocking in the suspension on bumps and irregularities in the road: the main causes

Stabilizer wear
Wear of stabilizers, as well as ball joints, can manifest itself when driving over deep potholes and potholes, when there is a sharp, clearly visible knock. To check the condition of the stabilizer you can on a stationary car rock the body, if from the area of the rack comes the characteristic knock, it should be replaced as soon as possible. Ideally, such diagnosis and replacement of the stabilizer bar should be performed in the conditions of service, which will allow determining the existing malfunction of the vehicle as accurately as possible.

Failure of shock absorbers
It is possible to define critical wear of shock absorbers not only by a thumping noise, when passing irregularities and road surface defects, but also by strong lateral and longitudinal car rolls. It is easy to check shock absorbers, you can press on a car fender, and then sharply lower a car body. If the car quickly returns to its original position and practically does not sway, then this indicates the good condition of shock absorbers. If, however, during this check, a constant long swaying of the body is noted, then the shock absorbers should be replaced as soon as possible.

Knocking in the suspension on the bumps and irregularities in the road: the main causes

Problems with the springs
On cars with springs, the springs during the operation of the car can wear out, resulting in a characteristic knock when passing bumps. Unfortunately it is hard to detect such malfunctions by yourself, so it is required to apply to service and perform a comprehensive diagnostics of the car. Detected faulty springs should be replaced as soon as possible.

Knocking in the suspension on the bumps and bumps in the road: the main causes

Shock absorber bearing
Not only shock absorbers can wear out, but also their support bearings. Diagnosis of such malfunctions is performed as follows. It will be necessary to grasp the spring with your hands, at this time the helper should twist the steering wheel in different directions. If there is a noticeable metallic run-out of the spring and its vibration, it indicates the wear of the shock absorber support bearing. Operation of the car with such malfunctions is not allowed.

What knocks most often in suspension when passing potholes and bumps

Wear of tie rods and arm silent blocks.
If a considerable worsening of the vehicle controllability is noticed, unwanted knocks occur when passing bumps, the car may go off the track in a turn, or on a level road, this indicates the wear of tie rods and lever silent blocks. It is not worth operating a car with such problems, as the condition of the car will only worsen, and it becomes simply unsafe to drive such a car.

Let’s summarize
The appearance of extraneous knocks from the suspension area can talk about the wear of leaf springs, tie rods and lever silent blocks, worn or requiring replacement of shock absorbers and their bearings, shock absorber struts and problematic ball bearings. As soon as such symptoms of malfunctions appeared, a car owner should immediately contact the service, perform the appropriate diagnostics and repair the car. If you delay going to the workshop, the suspension will eventually need to be overhauled.

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