Knocking in the front suspension when the car is rocking and while driving: causes
Content
The most severe shocks will undoubtedly be associated with a malfunction of the shock absorber, knocks are especially heard when the car is fully loaded. It is also worth paying attention to the bushings, stabilizer struts, if we are talking about the spring suspension of the car, then it will not be superfluous to diagnose silent blocks, spring bushings, inspect the earrings, replace the anti-creak washers and evaluate the condition of the sheets of a single element.
Noticing a knock in the front suspension when rocking the car, each car owner can be very upset, because it is difficult to identify the cause. But by checking all the nodes of the running system, it is still possible to determine the faulty component. First of all, they notice the appearance of an unpleasant sound while the car is moving, hitting bumps and at a complete stop. After that, you should proceed to the technical inspection of the levers, shock absorbers, tie rod, bearings, ball bearings, as well as the CV joint. What to do when a problem is detected, what uncharacteristic signs of a car breakdown exist, is also worth considering.
Why knocks in the car suspension
The most common cause of peculiar knocking sounds is a malfunction of the shock absorber struts. The knock appears precisely from the side where the suspension part is installed, you just need to put pressure on the area of \uXNUMXb\uXNUMXbthe car body near the wheel or listen to the behavior of the component at the time of hitting a speed bump or any unevenness.
When rocking the car in place
Without leaving the road for testing, you can also easily identify several common faults that will be responsible for the appearance of knocks. We are talking about the wear of the bracket connecting the spring, or the sheets themselves, the breakdown of one of the levers of the control systems, poor fastening or loose bolts of jet rods. Ball joints will manifest themselves when the steering wheel is turned, when the car is stationary, for the hydraulics to work, you need to start the engine.
When rocking on bumps in the car
The wear of some parts leads to the fact that, while slowing down to overcome uneven sections of the road, the brakes, the steering system, and the car racks begin to rattle. It is enough just to listen and identify the problematic side of the body, from which an unpleasant sound comes, after which, using the pit, make a visual inspection, making an effort to loosen the nodes of the system, all components must be securely fixed.
While driving
In such a situation, auto mechanics are advised not to listen to the noise from the chassis, but to observe the quality of handling, whether it is necessary to steer when overcoming sections of the route, or the vehicle goes as straight as possible on a flat surface on its own. If deviations from the course are detected, one can judge a malfunction of the front suspension, and the fault of such a manifestation can be both a ball bearing and other important parts of the car.
Possible causes of knocking
It will be possible to carry out the most accurate diagnosis only after the car has passed a road test, it is advisable to choose a coating with small bumps so that the buildup of the vehicle is felt.
Squeaking front Ceed from protection
Before setting off, the car owner needs to go around his iron horse from all sides and make sure that no part simply hangs on the body without fastening. It will not be superfluous to get under the car to carefully examine the front suspension, perhaps at this moment it will be possible to identify the cause of the knock.
Malfunctions in the suspension arms
If cracks or deformations of the metal are not visually visible on the body of the part, then the matter is in silent blocks, it is these rubber consumables that do not allow the bolts to reliably press the component of the system to the machine body. Since the lever is poorly fixed, a knock will be observed in the cabin and near the car when swinging. A similar problem in the front suspension, in addition to unpleasant sounds, often affects the handling of the car; when speeding up, the vehicle wags and “plays”.
Shock absorber malfunctions
The kurtosis manifests itself when the machine is swinging in the form of a dull knock, it will be possible to identify deviations from the factory characteristics by pressing with all the weight on the body of the vehicle in the area where each wheel is located. Serviceable shock absorbers of the front suspension should smoothly return the car to its original position without any extraneous knocks. You should pay attention to the presence of smudges on the bumpers, drops of liquid will indicate the failure of the part.
Steering problems
It is quite simple to identify the presence of deviations in the operation of this undercarriage system unit, but for convenience it is better to crawl under the car. Professional auto mechanics pay special attention to the main steering rack of the front suspension; in most car models, the part on the left side breaks down and makes a knock. To identify the problem, it is enough to swing the rail with your hand, the presence of even a small backlash is unacceptable.
Support for rack
To inspect this part, you need to open the hood and evaluate the gap on the thrust bowl, perhaps it is she who makes an unpleasant knock. After making measurements using a special high-precision instrument, the indicator should not exceed 1 cm or differences from the opposite rack should be observed.
Rear suspension Solaris
If the front suspension mounts sagged over time, then on small bumps, when the car is rocking, the shocks will stop damping, which will cause knocking.
Support bearing
You can determine the failure of this unit when you turn the steering wheel, it is when performing such a maneuver and rocking the car that an unpleasant sound often appears. On the steering wheel, a malfunction is rarely significantly reflected, but the controllability of the vehicle becomes noticeably worse. When overcoming straight sections of roads, in addition to knocking, the driver will be forced to constantly taxi in order to keep the set course.
Ball bearings
Turning the steering wheel left and right will help diagnose a breakdown of this component; auto mechanics do not advise joking with a part of the front suspension. Ignoring the manifestation of component failure, the driver runs the risk of losing one of the wheels directly on the road if the car is seriously rocking. Such excesses are very dangerous not only for those sitting in the cabin, but also for ordinary passers-by, as well as other road users.
Constant-velocity joint
The rotary mechanism under the abbreviated name SHRUS often causes knocks in the front suspension of a car. You can check the health of the node using the following algorithm of actions:
- Put the car in the pit, turn off the speed, use the handbrake.
- You need to try to push the half shaft inside the CV joint and back, observing the occurrence of play.
- If loosened elements are found, it can be safely assumed that the parts have crumbled.
Abnormal causes of breakdown
Sometimes it is simply impossible to determine a faulty part by ear due to the not very distinct manifestation of knocks. When the car is rocking, a creak uncharacteristic of the front suspension may appear, and only in dry weather, when it rains, this excess disappears, then reappears.
Knocking in the front suspension
The problem should be sought in the ball bearings, which means that the components of the walker run dry, the lubricant has leaked out due to wear of the anthers. Sometimes the knock comes from poorly fixed plastic wheel arch liners or a handbrake cable that has come loose from the fasteners and goes to the rear axle. Such sounds have nothing to do with the suspension, but they can easily mislead the driver with their uncharacteristic manifestation.
Knocking in the rear suspension
The most severe shocks will undoubtedly be associated with a malfunction of the shock absorber, knocks are especially heard when the car is fully loaded. It is also worth paying attention to the bushings, stabilizer struts, if we are talking about the spring suspension of the car, then it will not be superfluous to diagnose silent blocks, spring bushings, inspect the earrings, replace the anti-creak washers and evaluate the condition of the sheets of a single element.
What to do if the suspension knocks
When unpleasant sounds appear during the buildup of the vehicle on the move or in a standing position, it is better to immediately seek help from auto mechanics. Before going to the nearest service station, carefully inspect your personal car for parts torn from the fasteners, it is simply not safe to ignore the state of the car when knocking occurs. Rubber consumables, silent blocks or front hub bearings can be changed independently, but before purchasing a specific part, it is necessary to identify the exact cause of the breakdown, and this task sometimes takes a lot of time.
