Whistle is strong under the hood. What does whistle talking under the hood? Timing belt rollers and other problems under the hood

the main / Tuning

Many motorists faced the fact that a whistle appeared when the engine starts to cold. What is the reason for the occurrence of this effect? Those who had in the operation of the Zhiguli "Classic" immediately know where to look for the cause.

The reasons

For old cars, whistling on the cold engine meant that the drive of the water pump or the pump itself came into disrepair. For newer cars, there may be several causes of this effect.

It is worth noting that this malfunction is associated with engine mechanics, and you do not need to climb into the electronic unit Control. Therefore, consider where the motorist needs to look for a malfunction if he wants to repair the vehicle with his own hands:

Drive belts.
Videos.
Water pump.
Generator.

Debugg

When the main reasons are predetermined, you can proceed directly to the troubleshooting process. Standing with time and tools. Now that everything is collected, you can proceed. It is worth being prepared for the fact that the details will be required.

It is worth noting that for each specific brand and model of the car, the design features of the repair and location of the parts will be different.

Drive belts

Usually, a whistle in the engine, especially when cold start - is associated with belt drives. So, the stretched belt slips on the pulley, which creates a characteristic squeak. Often, this effect is characteristic of the belt of the gas distribution mechanism on newer cars. There are two ways to eliminate a malfunction.

The first way is to make a belt suspender (only for cars having a belt and tensioning roller). To do this, you will have to dismantle the protective cover, which closes the timing, and then, with the help tensioner roller Tighten the drive. Sometimes it happens that the belt is in a very worn out state and requires replacement.

The second way is to replace the belt. Replace the drive belt of gas distribution is quite complex and long-term task. Therefore, it is recommended to carry out this operation on the car service of professionals. Many motorists, by ignorance, when replacing the drive belt, shot down the gas distribution phases, which was subsequently subsequently, severe consequences for power aggregate, such as overhaul.

In different automakers, the change in the timing belt replacement belt will be different timeBut the average indicator believes that the element is subject to shift after 40-50 thousand km of mileage.

The process of replacing the timing belt is quite simple, but also at the same time it is difficult to perform without knowledge of the design. vehicle, as well as repair methods. So, consider the main provisions for replacing the timing belt:

For the beginning, TNM tags are set. This is necessary in order not to knock down the gas distribution phase when the belt is replaced.
The camshaft or shafts are fixed on pulleys from turning. There is a special tool for carrying out this operation, but as practice shows, motorists are fixed with appropriate ways.
Next, weaken the belt by unscrewing the tensioning roller.
If necessary, on some models of cars, pulley is removed crankshaft.
Remove the belt from the seats.
Usually, the assembly of the node is carried out in reverse order. For many American cars, there is a specific sequence of the timing belt setting. Therefore, before replacement, it is recommended to study manuals.

Videos

Together with the timing belt, the whistle can be caused by the belt of the tensioner. This is due to the fact that the belt slides in the detail, creating a whistling sound. Change car rollers together with the belt of the gas distribution mechanism.

On some cars, the rollers can be replaced without dismantling the drive belt. It is worth remembering that when changing the element it is necessary to adjust the tension of the drive belt, since if this is not done, then a whistle will appear again, and the belt will be susceptible to elevated wear.

water pump

Many owners of Zhiguli are familiar with the whistle, which appears after the launch of the engine on the cold and after the warming disappears. This effect caused faulty pump parts. Both in old and more new models of cars - the effect of the whistle can cause a water pump.

As in the case of timing belt Whistle can be caused by the wear of the water pump belt. On old cars domestic production The pump is driven by the crankshaft pulley, while the timing chain works on the chain installed directly in the block. For newer cars, the pump is a member of the timing belt drive.

Consider this option for malfunction only for the old generation of vehicles. To troubleshoot a malfunction will have to determine where it appears from. To begin with, you can change and pull the drive belt. Tension adjustment is usually carried out using a generator.

Before dismantling the pump and understand the inner elements, it is worth paying attention to the condition of the pulley drive. During operation, this item could deform and bring a lot of problems. Therefore, first we investigate it for deformations and positions.

If the whistle did not disappear, after changing the belt, then we go deeper. In this case, it means that the whistle comes from the inside of the design. What can make such a sound? Depending on the constructive features Car models whistling can wear bearing or water pump drive shaft.

For most car models - this means the replacement of the water pump. But, here for old models, gas, such as Volga 24 and 3102, as well as the 53rd lawn, can be changed directly to the bearing itself and shaft. But, this species Operations are capable of performing not all even the most experienced motorists, so it is recommended to contact the car service.

Generator

Another car element that can cause a whistle under the hood of the vehicle is the generator. So, as in the case of a water pump, it is worth examining the belt and the pulley of the drive. In contrast to the pump on the generator, a weak shaft, which can be slightly deformed that it will break the position of the pulley.

In turn, the belt will not only slip, but quickly wear out. Therefore, before climbing directly inward, it is worth examining whether there is no external damage to the product.

In the generator itself, the whistle may be caused by the belt of bearings. So, they can slip at the landing site or slides the drive shaft along the inside of the bearing, which causes friction of metals, which is heard as a whistle.

To troubleshoot a malfunction, remove the generator from the car. Disassembly of the details should be carried out strictly clearly service manuals for diagnosis and repair. Next, when the product is disassembled, it is worth investigating the condition of the shaft, bearings and seats. If malfunctions or damage are detected, such parts should be replaced. Do not change anything superfluous.

If the motorist did not carry out the repair of such products or the sequence of actions will seem complex, it is worth contacting the auto electricians. Specialists will be able to replace the bearing, or repair the details of the generator. For example, replacing the shaft on the supported, which is in good working condition.

Output

The reasons for the occurrence of whistles in the engine are considered. This effect is usually caused by the material with a worn out. To eliminate the trouble, it is necessary to replace one of the elements: belt, tensioner, pump or generator part. Not all motorists are able to do the process independently, therefore it is recommended to contact the car service.

Read 8 min.

Often with active drifts and the use of the car there are a variety of breakdowns and trouble. In this article, we will look at one of these problems, namely whistle under the hood on the cold. Start reading right now!

Any car enthusiast dreams of riding his car without any concerns, and the engine to work as expensive hours. But quite often happens that the driver begins to hear any extraneous knocks and whistle under the hood of the car. Absolutely different sounds may occur, but to facilitate the repair and diagnostics of the fault, they can be placed in a certain order by characteristic features. Most motorists are quite often visited by car service centers with a certain complaint and most often this complaint about a quiet whistle of the car on the cold during the pressing of the gas pedal, which is terminated only after the breakdown of the pedal and again begins after pressing. Moreover, the car whistling is heard only the driver and no one else. In this article, we will talk in more detail about extraneous sounds under the hood of the car, and especially on the cold, and we will tell the main reasons and methods of eliminating them.

The main symptoms of the appearance of foreign sounds under the hood of the car

Usually, workers of automotive service centers are trying to detect an extraneous sound, which hears the owner of the car, but you need a whistling, annoying owner and cannot hear. In consequence, the motorist has to pick up the car from the road service, and without solving the problem. In this case, the owner of the car continues to find the source of an irritant sound independently. Quite often happens that the problem of outside sound is noticeable only by the owner of the car, because he knows his car well and literally feels it. It is clear that a stranger, sad behind the wheel, a person does not know your car and will not be able to notice an extraneous sound. It will be especially difficult to tune in to the sound of an unauthorized person if he won't know what he should hear what wave will be configured, and will listen to all foreign sounds, without giving much an irritation source, relating to its normal operation of the engine. But you should not be afraid in advance, because if the problem is the node, about which we will talk about today, then the specialists of the automotive service are really right, which means that the source of the outside sound and the sound itself is not the symptoms of any serious problem. In this case, everything lies in the driver's feelings, but the nerves of the machine owner is naturally much more expensive and therefore it is necessary to find out the reason why the driver hears a whistle in the hood car compartment on the cold.

There are many symptoms of outside sound under the hood of the car, but we will consider only the most common. So, several main causes of whistles in the hood zone of the car in the cold:

The occurrence of outsiders while pressing the gas pedal;
Whistling himself is rather quiet and hears only with full silence in the car's cabin;
An extraneous sound becomes a bit quieter when the gas pedal is released;
An extraneous sound is not heard to other participants of the movement and even passengers of the car, because they do not conduct parallels between the appearance of a whistle and pressing the gas pedal;
An extraneous sign reminds of a rather quiet whistle.

Analyze all of the above symptoms and its situation, in the event of a coincidence, it makes sense to read the submitted article further. Otherwise, it is worth going to the car service center once again and leave the car for another check.

The most common causes of the appearance of foreign sounds under the hood of the car and how to eliminate them

Surely many car enthusiasts at least once come across a whistle's problem on a cold or even a knock. In addition, extraneous sounds can occur not only from owners of used cars, but even during the start of the engine of a completely new vehicle. In some cases, the whistle on the cold may occur due to the tipping of the equipment, and in many cases such a trouble disappears after the first days of active use of the car. For previously used cars, the reason for the occurrence of foreign sounds, such as grinding and whistle, can be in the breakdown of certain parts. But the listed reasons are the easiest explanation of the emergence of foreign sounds under the hood of the car, which appear during the operation of the machine. Whistle may arise due to the inattentive appeal of the owner of the car or due to absolutely natural wear. defined details and nodes that will need to be replaced.

Foreign noise under the hood of the car may occur due to more serious reasons, and in this case it is necessary to get rid of them as soon as possible. Usually, the specialists of automotive services are engaged in this, and today there are plenty of them.

There are many reasons for the emergence of foreign sounds under the hood of the car, but we will consider the most common.

So, the main reasons for the appearance of a whistle under the hood:

The creak can occur due to poor fixing cover;
A strong knock of the valves during the operation of the engine;
Bad isolation fastening under the hood cover;
Pisk may occur due to poor tension of drive belts;
Faulty air filter installation;
Noise resembling diesel, can occur while warming up the engine;
Poorly fixed electronic engine control unit;
Trresc often occurs during self-diagnostics after starting the engine.

Based on this, we can conclude that there can be quite a lot of reasons. In addition, different models of machines have the same sound to occur at completely different reasons. But it is not necessary to dwell on it and constantly search for an extraneous noise, since there are certain sounds that relate to natural. The banal cause of an outsider sound can be the free position of the washer hose, which is quite often hit by the case. If the crop and whistle is formed at identical reasons, then use insulating or sealing materials, for example, anti-buck. The use of such materials will ever save you from the unpleasant sensations that cause a crackling and a squeak under the hood of the car. In some cases, foreign sounds may arise as a result of more serious reasons.

The driver can hear whistle under the hood of the car, even if the car is completely new. In addition, the tonality of whistle directly depends on the number of revolutions. That is, an increase in the number of revolutions leads to an increase in the change in the tonality of whistle.

Basically, the cause of the occurrence of a whistle under the hood is the generator belt or the pump drive, but the reason can be conclusted in some other drive. To do this, check the tension of all belts. In case of hitting the dirt or oil belt, it begins to slip, and it is at that moment the driver will hear a whistle. The level of tension of the generator belt is adjusted by loosening the nut fastening the generator body to the adjusting bar, and moves it by mounting to the side opposite from the engine. After adjustment, you must tighten the nut fastening the generator. Naturally, it will be better to replace the generator belt.

In the case of a normal tension of the generator belt, it is necessary to check and, if necessary, replace the voltage relay controller. On new cars it is embedded in the generator, and on old cars it looks like a plastic box, screwed to the mudguard front wing. In order to replace the relay controller from the very beginning, you need to unscrew 2 fasteners, disconnect the contacts, and then remove the controller from the generator body along with the brush node. Next, you need to check the contact rings.

When the burnt, they must be cleaned with the help of fine-grained skin and rub the cloth, which initially need to be moistened in the solvent. Note that the voltage may differ slightly from the nominal, but it is absolutely normal and soon it is adjusted independently.

Another reason for the occurrence of a whistle under the hood of the car is intake system . The most common recommendation is considered to be cleansing. throttle valveTherefore, the long-term use of throttle facility contributes to the contamination of moving parts, and sometimes even the flap is encoding. After clearing the throttle, the whistles most often really disappears. Please note that the quality cleansing of the throttle is impossible without removing and dismissing the node itself, as the most dirt is accumulated in the most inaccessible places.

The culprit of the occurrence of the whistle under the hood can also be a PCV valve. The PCV valve is located in the intake system and its main task is to regulate cutter gases. To get rid of the whistle under the hood of the car, it is necessary to clean the valve. Although the valve is not very expensive, but it is not necessary to replace it, because it can be easily cleaned.

So, the valve cleansing algorithm:

From the very beginning it is necessary to remove the valve from its place. The valve can be built into valve coverbut some valves like old flow fuel filters Located on the ventilation tube of Carter. The most important thing is that this is that the valve must be placed relatively not very far from the air filter housing;
After the valve removal procedure, you must make sure the material from which it was manufactured. In the case of the manufacture of the valve made of metal materials, it can be purified by absolutely any cleansing means (for example, liquid, aerosol, on different bases). Most importantly, do not overdo it during mechanical cleansing. It is best to observe such a sequence of actions: sprinkle, stick the valve inside, sprinkle, and so repeating the same actions several times until the valve is enough to move freely. Self top scores With the lowest costs, with the condition of the presence of free time, as well as the metal body of the valve, gives a simple immersion and wrathing the valve in a glass with a diesel. In the case of the manufacture of a valve of plastic, the order of cleansing remains the same, it is simply necessary to avoid strongly aggressive liquids for cleansing so as not to damage the valve body itself;
Install the valve in place.

All car owners pleases the situation when the car works properly and without interruption, and a smooth rust of the power unit is heard from under the hood. However, it happens differently when the car makes a whistle, knock and other foreign and irritant sounds. This especially frightened inexperienced drivers. Sounds and whists can have a variety of origins, which can only be determined by an experienced driver.

Of course, only a specialist at maintenance station will be able to determine as accurately as possible at full diagnostics. Moreover, it is necessary to find out the reason for the appearance of extraneous noises as soon as possible after their appearance.

From under the hood can be heard a knock of the engine, whistle belts and bearings hinged equipment, Crack, crunch and other noises. Such sounds are superimposed on the overall smooth sound of the engine operation, differ in force, frequency and intensity. It must be remembered that extraneous sounds can not always point to a serious breakdown.

Whistle when starting a power unit

Immediately it is worth noting that you can make a whistle or a squeak when you start the engine, not only cars with mileage, but also new cars. As a rule, it happens in crude weather. After a few seconds, such sounds disappear and no other signs of fault may not be. Also, a distinct whistle and short-term squeak may sound constantly, and with an increase in the rotor of the motor becomes louder. In both cases, as a rule, the noise source is the drive of the attachment or drive belt.

The quiet and shrill whistle is published: the drive belt of the generator, the power steering (GUR), the air conditioner drive or the coolant pump drive. In addition, it is worth noting that the source of whistles can act like themselves drive beltsAnd bearings in the above-mentioned equipment. Also, an extraneous sound occurs as a result of the production of pulleys or dirt.

Sweet belt generator

The generator belt is one of the most frequent causes of whistle. If this happens on the newly established car or in crude weather - in general, no danger carries it. This is quite a normal phenomenon, you should not worry. But if the whistle continues and during the movement, it is necessary to alert. As a rule, whistling begins due to the weak belt tight or its slippage. With a set of revolutions, whistles usually disappears, because the belt stopped sliding and began to work synchronously on the pulley. Often it happens when the street has increased humidity. Moisture on the surface of the belt and pulleys provokes a decrease in the frictional properties of materials.

This situation indicates that the belt is weakly stretched or lost elasticity. In principle, at the stability of the engine of this kind, minor slipping does not affect, but at the first opportunity it is necessary to check the status of the belt and the degree of tension, since the battery may not receive a complete charge.
Skipping the belt for pulleys during the cold season may due to thickening lubricant in the generator bearing. In this situation, the belt cannot turn the pulley - and slipks. After heating up this kind, the whistle can how to disappear and remain. If the whistle is still present, it should be checked if the pulley of the generator rotates. Sometimes it happens that the generator shaft encloses. You also need to check the condition of the pulley surface.

A short-term or permanent whistle when starting the motor is very often not associated with the tension or critical wear of the generator belt. The source of whistles can be on the driving belt dirt, motor oil or other technical fluids. In such a situation, the generator belt must be immediately replaced (even new).

In addition, it happens that the belt published a whistle constantly and unexpectedly stopped. There is a high probability that he broke off. If it happened, on dashboard The indicator will light up, indicating that the battery charging stops. If you do not correct the situation and continue the movement, the battery will completely discharge.

The degree of belt tension can be checked independently - just click on it. If the deflection is noticeable, the suspension is necessary. Plus, the belt should not have any defects, bundles and traces of technical fluids.

Other sources of whistle under the hood (air conditioning, pump, gur)

The source of the whistles can perform an air conditioner compressor and a driving belt of the coupling. It is quite simple to check - turn on and turn off climatic installation. Very rarely can make a whistle belt of the generator after switching on "climate", as a result of a significant increase in the load on the generator.

In addition, the whistle may arise:

When slipping a compressor drive clutch. This is due to the fact that there is little refrigerant (freon) in the system. The latter performs the lubricant function for the compressor.
When interruptions in performance and loss of quality lubrication of the compressor bearings and pulley (depending on the design features). A similar situation may occur with the pump gur and its drive, as well as the liquid pump of the cooling system of the power unit.

The occurrence of a whistle in the pumproom space during acceleration or motor operation on idling In any case, it is an alarming mark, although most often it is not something critical. However, you should not leave this fact. During operation, it is necessary to process the drive belts with special chemical compositions that will retain elasticity, protect rubber products from cracking and drying.

09 Oct 2017

Surely each driver noticed the appearance of a characteristic whistle in the rotor space. Indeed, this is an unpleasant moment, both for the driver himself and for the surrounding people. The most important thing is to understand that the whistle, depending on the places of its manifestation, will differ significantly and, accordingly, according to the nature of the whistle, an experienced driver or a master on a hundred can immediately determine the node from which unpleasant sounds occur.

What can whistle under the hood

As described above, the whistle can come from different mechanisms due to some reason. It is important to remember that when a whistling does not always, it means some kind of serious malfunction. So what can serve as a source of whistles of different character?

Generator belt;
The roller of the tensioner of the generator belt;
Pump bearing GUR;
Tension roller timing belt;
Air conditioner compressor bearing;
Water pump drive (pump);
Valve pressure regulator membrane.

Above lists the basic elements of the carpenter of the car from where the whistle can be. But again it is important to understand and distinguish the type of whistle. If the reason in the thinner of the generator belt, then it is necessary to know how the whistle manifests itself with friction of rubber about metal. If the whistle looks like a sound with a metal friction on metal, then these are bearings and rollers.

Causes of the appearance of a whistle under the hood

Increased humidity. This is the main reason for the appearance of a whistle under the hood of the car. The fact is that when moisture gets into the generator belt, the frictional ability is reduced and a whistle appears accordingly.

Grease. In addition to moisture, the reason for the appearance of the belt whistle may be difficult to turn the pulley of the generator due to the fact that the lubricant in the generator bearing may thicken. But it is important to remember that this problem is manifested when the engine is started into the cold.

The belt tension elements are not adjusted. It is also worth mentioning about the weak tension of the generator belt. With a weak tension, the removal of the belt takes place on the pulley, which causes the appearance of a characteristic whistle. Below you can listen to how the generator belt whistles.

Absence lubricant in bearings. An equally common problem is a whistle bearings and rollers. In the absence of lubricant on rubbing bearing surfaces, a characteristic whistle is also manifested, but as it was already said this sound will be different from all familiar leaf of the generator belt. This sound can even be called a whistle, but a full-fledged roar. Below you can listen to the generator bearing.

The water pump drive is very similar to the sound of the generator belt. Therefore, in this case, it is necessary to have a clear hearing to determine the specific place of manifestation of the whistle. How whistles pump can be listened below.

Conclusion.

Of all the above, it is important to conclude that the occurrence of a whistle in the podcast space be it when overclocking or engine operation at idle is in any case an alarm signal, although in most cases and not critical. But still requires attention, search for causes, adjustments or replace individual elements. And you should not eliminate whispers and pisks various liquids or oils. This will eliminate the sound, but will not eliminate the malfunction.

Causes and perpetrators of whistle in the procession Was Last Modified: October 3, 2018 by Administrator.