You can hear a knock when you get off the ground - what does it say?

In the life of a car enthusiast, a lot of situations happen, when a car breakdown requires self-intervention. This may be due to both troubles along the way and a lack of time. For this, the experience and friendly support of other drivers will come to the rescue. The presence of extraneous noise is considered one of the alarm signals and serves as a reason for checking the technical condition of the vehicle.

What causes strange sounds?

Knocks are usually the root cause of the wear of the backlash assembly. Noises are associated with the friction of the details. Knocking when starting off is the simplest breakdown, which can be eliminated on its own. Often, there are situations when it is almost impossible to determine the presence of a malfunction auto. To fully understand this issue, you need to know the reasons that contribute to the malfunctions.

The main causes of knocking can be related to breakdowns:

• SHRUSS;
• CAT;
• Fastening of wheels and racks of the power unit.

But this is not a complete list. In fact, there are much more reasons. It happens that it is impossible to determine where the knock comes from when it starts to move. In this case, diagnostics will come to the rescue, before which you have to put the car on the inspection pit and carefully check all the details of the engine compartment. Let's consider all possible troubles separately.

SHRUS and other elements of running gear

If the problems are related to the CV joints, when the steering wheel is turned from side to side, sounds resembling clicks will be heard. If you hear a knocking on the front, you are likely to have a problem with the steering. With continuous sound and smooth wheels, you should think about the serviceability of the running gear. About breakages with steering rods or tips it is impossible to say anything definite until you do the testing.

You can independently check the following:

• When turning the rudder in one direction, determine the steering rod and shake it. There should not be any backlash.
• Do the same with the other party.
• Stop the engine and carefully twist the steering wheel within the play. Lean against the hood and listen to it for knocking.
• Remove the wheel and leave the machine on the jack. Look at the fasteners in the field of the running gear and the degree of its contamination.
• If there are gum breaks, do not do any unnecessary actions. Go to the service station, where specialists will diagnose the vehicle.

Usually, these recommendations allow you to independently find the cause and solve the problem. If you hear a knocking in the front, it is necessary to inspect the track and 2 times a year at least once a year to diagnose the machine on its own. This is especially important when changing rubber from summer to winter.

Fasteners with bolts

This is the most frequent reason, as a result of which you can hear a knock when starting off. Periodic inspection of fastening will help to minimize the number of specified cases. If the cause of the breakdown is hidden in the gearbox, when there are sharp jerks and speed dials, check the fastenings of all the components of the engine compartment.

In the diagnostic process, pay attention to the following elements:

• Generator. If the attachment is unreliable, it can stagger, which will lead to the formation of a metallic knock, while the charge will be absent.
• Knocking when starting off can be triggered by a starter. To be more precise, it is interconnected with loose bolts on it.
• A similar knocking in front when starting from the ground provokes the lack of attachment of the battery, which simply staggers.
• When tapping, pay attention to the strength of the wheels. Check them regularly, because this affects the safety of your ride.
• When the crankcase is torn off, there is a tapping and crackling.

The list of these reasons is not limited. These are just the main ones. Virtually any part can be weakened, so when you touch the place you can hear the knocking of the dangling parts. The most difficult of all failures can be easing the engine cushions. It will require infusion of certain cash. Most likely, you will have to ask for help in SRT.

Gearbox - manual transmission

Causes of tapping:

• Friction between clutch and gearbox.
• High degree of deterioration of the disk.
• Absence of one or more denticles on the gearbox.

Automatic transmission

Now consider the automatic transmission. Everything is much more complicated in it. Therefore, even with a slight tapping it is necessary to follow the recommendations listed below:

• Carry out the dismantling and analysis of the checkpoint. This can only be done in a car repair shop.
• To find original parts on the automatic transmission for its full restoration.
• Make the installation of spare parts again, following the instructions for using the equipment.
• Test the mechanism and complete the complete assembly of the power unit.
• Carry out a battery operation check and make sure there are no noises and no knocking.

As you can see, this is not an absolutely simple task. Repairing the battery will also require additional costs. But without this procedure, it will not be possible to eliminate the breakdown.

Problems with the power unit associated with the generator

If the belt of the generator is weakened or out of order , then a sound will be heard in the form of a squeal. To stop it, you should tighten the belt. In case of uselessness of such actions, replace the element.

water pump

With its malfunction, you will feel a kind of whistle at idle. The way out of the situation is to replace the part.

Ignition Faults

It shows itself when the vehicle is dispersed. You will hear a sound in the form of a metal knock. This is due to the explosion of the combustible mixture. The cause of the breakdown could be the use of low-quality gasoline and the formation of a large amount of carbon. In addition, it is possible that there was a detonation in the engine or the spark plugs failed. You may need to replace the candles. This problem requires special attention, as long-term operation of transport in such a state can lead to the destruction of the motor.

Timing

This breakage will make itself felt by a chirping sound, which will be amplified with a full engine operation and decrease with the release of gases. The cause may be a loose chain tension or timing belt. When it breaks, the knock will be more loud. If this happens, prepare a considerable sum of money.

In which cars do you most often get a knock when starting off? 2110 - a domestic car, which is often subjected to various breakages, especially if it is second-hand. The sound is amplified when the gearbox is shifted. If you have knowledge of car repair, then this problem can be solved independently. I'll have to buy a few details and collect everything correctly. Otherwise, contact the service center.

Sound of unknown origin

It happens that the reason for the knock is not associated with any of the above-described breakdowns. What to do in this case? Probably, the problem lies in the cable or bad attachment of the sensor, which knocks, touching the surrounding parts. A similar sound can be observed after the foreign object has entered the engine's area of the machine. Finding such a problem is difficult, but you can try.

• Carry out a complete diagnosis.
• Determine the most precise place from which the knock comes when moving.
• Explore all situations in which sound arises and disappears.
• Try to carry out self-repair.

If you are lucky, you are saved. In another case, you have to drive until the failure itself shows. Each driver knows: the louder the knock, the faster something happens. Practice shows that the sounds of an unknown breed can still come from the running gear. For example, cars with a dependent rear suspension may make noise due to the suspension bracket attached to the shock absorber. Knocking when starting off (VAZ-2110 is no exception) can be associated with the broken pin of the stabilizer arm. It is located on the lower arm, in the area of the front suspension.

Knocking when starting from the spot (VAZ often undergoes such a problem) can also provoke a crack of the lower bracket of the shock absorber in the place of fastening to the lever. Particularly interesting is the reason for the knock on the "Niva". The first manifestation of extraneous sounds is the result of a prolonged and careless operation of the machine. Knocking when starting off ("Niva" - one of the examples) in most cases is associated with body malfunctions. One of the root causes may be the detachment of the lifting eyes of the transverse lever.

Let's draw conclusions

Proper use of the vehicle is possible only without the presence of extraneous sounds. Carry out regular maintenance, make repairs on time, carefully inspect the machine, do not ignore any details. Otherwise, you will experience eternal discomfort and constantly listen to the noise while driving. Therefore, it is better to immediately spend a certain amount of time and detect a breakdown, than to look for the cause of unclear anomalies.