A sharp turn of the starter - we eliminate the malfunction. Crushing, whistling and knock at the launch of diesel engine: What is the reason (and what to do) after starting the engine, the metallic grinding is heard
Starter Each machine is needed - this small device runs the engine, without which it is impossible to move for obvious reasons. At the same time, the starter serves a rather short period, rarely exceeding six - seven years, after which it requires a complete replacement of new, as a result of wear. But during the six years of operation the starter is subject to small breakdowns and faults.which can be eliminated by their own.
Repair starters With serious damage, it is better to provide specialized car services, which today there are quite a large quantity.
One of the symptoms of the starter fault can serve a sharp unpleasant sound During the launch, which is similar to the mechanical crop - the reasons for such a phenomenon can be quite a lot, but the main one is malfunction of the starting gear.
In the process of exploitation of the teeth, the starter gears wear out - scratches appear on them, they bend and gradually fail - by itself the gear with the penetrations cannot function normally.
Eliminate such a malfunction simply - you just need to disassemble the starter and pulling the gear, replace it with a new one. Bendix. - One of the most inexpensive parts of the starter, but not a timely replacement of this detail can hit the pocket. Quite often because of the wear of the gear, the Bendix can not get out of the engagement with the flywheel, and the starter continues to work with the engine until complete destruction of the device. It is not necessary to correct the brushed teeth with the help of the girlfriend - the hammer or pliers, which are in the arsenal of each ordinary motorist, do not work out, so it's better not to try, but simply replace the Bendix to a new one.
The following cause of the grinding can be wounded in the buffer spring - this is the most frequent reason for which it is produced repair of starters foreign cars - Spring over time weakens its tension and Bendix comes out without fully creating proper engagement with the car flywheel. The only way out of such a situation is her full replacementwhich can be made both independently and in the car service. Works of this kind of no road.
The last reason for such a malfunction lies in the adjustment of the gear movement itself, fix that can be possible only in the car service, with the help of qualified professionals with the appropriate formation and experience. In addition, the incomplete yield of Bendix may be caused by wear of the plug of the retractor relay, and find this item is quite difficult to find this item.
Always need to remember that if you are not sure that you can independently perform repair faulty details, it is better not to be thrown for it. It is possible that you will make only worse, the ultimate repair can do it much more expensive.
Various deviations from the norm may occur as a result of the wear of individual elements. hinged equipment, drives, bearings, pulleys or belts. Also should not exclude the likelihood of damage to the most power unit and its nodes. Drivers often notice that when the engine starts, the engine will be heard, in the engine something creaks something, a whistle appears, and the like.
We also recommend reading the article about what it means. From this article, you will learn about various noise and knocks, which represent a large or smaller danger to the engine, as well as how to differentiate them in the process of self-diagnostics.
It should be noted that usually many sounds are better auditioned at the moment of cold start, although in some cases noise does not leave even after heating the power unit. It is also necessary to add that in some cases the problem progresses noticeably, that is, the sound each time or gradually enhances. In other situations, extraneous noises may not change their tonality and intensity throughout hundreds or even thousands of kilometers.
In this article, we will talk about what breakdowns can lead to the fact that when the engine is cold started, noise is heard, as well as for what additional features you can determine the malfunction yourself.
Read in this article
When the engine starts, the engine is heard
If the driver turns the ignition key to the "Start" position and at this moment it can be selected, while the noise disappears after the engine "grabs" and starts working independently, then the most frequent cause The starter malfunction is considered.
If when starting the engine, the starter grinds is heard on the cold or hot, then there may be several reasons for such a malfunction.
As a rule, it is necessary to check the retractor relay, the Bendix starter and. The fact is that the Bendix may not enter with the flywheel properly, with the result that when the engine starts, the crack is heard or a characteristic starter grinding appears.
When starting the engine, a whistle is heard
A whistling sound at the time of start-up usually makes a belt of the generator or (pump). The fault is manifested in the form of high-frequency pisch or squeal after the launch of the engine, and may also know about herself already on the heated motor when harsh pressed On the gas pedal and increasing revolutions.
- In case of a problem with the belt, it is necessary to check its condition and stretch. Sometimes temporarily helps special compositions To care for rubber, which allow the belt surface to remain soft and elastic, protected from cracking, etc. With an obvious loosening of the tension, the generator belt must be tightened by simultaneously checking the state of the pulleys and tensioner. We add that a strong stretched belt is not recommended, since the whistle manifests itself in a short period of time. In this case, as well as when pulling the generator belt is not possible, only replacement is shown. If the belt is normally stretched, does not slip on the pulleys, but still whistles, then it may turn out to be poor and demands a replacement.
I also add that the cause of the whistles may not only be the belt, but also the generator itself. More precisely, problems may occur with the bearings of its drive. This indicates a characteristic rustle, whistling, easy crackling during the operation of the motor at the XX.
- Pomp also makes a thin whistle on idlingThe problem may be accompanied by a rocution or crackling. This feature is a reason for the mandatory verification and replacement of this item.
To check the generator and / or pump, you can take a tree bar, also at the end of a wooden stick you can attach a tin can, etc. Then one end of the bar or a stick is applied to the generator drive area or pump on the engine running, and the other end of the bar or the tin can the tight bank is depressed to the ear. Such a solution allows you to more accurately determine the source of noise and localize a malfunction. By the way, if there is an opportunity, instead of self-made tool for listening to noise, you can use the so-called car stethoscope (sometimes medical).
If the noise source is not fully installed, then it is necessary to remove the generator belt, after which the pump pulley or the generator is sharply rotated. The appearance of noise, difficulty during rotation, beating, hopes and other deviations from the norm will indicate the problem. In the case of the generator, the device can be repaired, replacing bearings. The pump is recommended to immediately change, since on many cars, the water pump jacket leads to the timing belt cliff.
An additional reason for replacing the pump is considered to be the appearance of flops at the place of its installation. Leaks of coolant represent a danger in the form of overheating of the engine, the opening means that it strikes the software, as a result of which the valve is oppressed. Ultimately, when you ignore these problems, the motor can be needed expensive or even.
When the engine is started, the knock is heard
The appearance of the knock in the engine should be divided into problems with the elements of the internal engine itself (and, pistons, crankshaft, etc.) foreign sounds in the MRM region may indicate significant wear of the rollers, the strap defects or.
Rollers can whistle, sweep, criste or pride. In some case, the timing belt loses the protective casing. We also note that on the motors with a chain when tensile the chain itself or insufficient tension, the sound resembles a rustling rift, and cotton can also be born. If you increase the revolutions, such sounds disappear and again appear after the gas reset. In this situation
The characteristic brake of the gas distribution mechanism is considered the knock and / or exhaust valves. Such a knock differs in frequency from other knocks, has uniform intervals. The fact is that the camshaft rotates twice as slower compared to the crankshaft. To the appearance of knocks can lead.
Why cold Engine May knock: various malfunctions. Analysis of the character of a knock in force aggregate: ring, metallic, muted, etc.
Even an inexperienced car enthusiast will say that the main unit in any vehicle is the engine internal combustion. If malfunctions occur in this node, the driver learns about it immediately on the behavior of the car. One of the common problems in the work of the motor is the appearance outsided sounds. Why is the whistle and how to be in this case - in detail in the problem will help to figure this material.
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Causes of extraneous sounds in the engine compartment during or immediately after the engine start
If a whistle and other outside sounds are heard when the engine is started, it may indicate different problems associated with its work. As a rule, these sounds are not so dangerous for the unit, how much they get bored by the driver. However, when the appearance of cavity, clicks, engine knocking problem must be solved immediately.
Belts
So, if a whistle appears when the engine is started, then belts are one of the most common causes of such a problem. The screech may be due to the wear of a belt either by its poor tension, and it can become louder with an increase in crankshaft revolutions. But sometimes when you press the gas, the whistles may also disappear. If when trying to start the motor you heard a whistle, then first you need to check the stretch of all drive belts.
If during the diagnostics you noticed that one of the straps is weakened, then this in turn can lead to its slipping, which is fraught with the appearance of uncharacteristic sounds of sounds. In this case, the strap stretch can solve the problem. Remember that the reason for slipping can also serve as dirt and engine fluid that fell on the straps. If so, then the reason for the leakage of oil needs to be solved before replacing the belt, of course, you can try to clean it, but experts recommend them to change them (the author of the video is the channel in the garage at Sandro).
As practice shows, most often the ringing and squeak when the motor starts is due to the generator strap, and foreign sounds disappear after increasing the turnover of DVS. Such a problem is fraught with a disadvantage of the battery, which, in turn, can lead to multiple consequences. Moreover, if the belt breaks, the battery simply will not be able to charge when the engine is functioning. As a result, on dashboard An appropriate battery discharge indicator may appear if it happened, then it is necessary to check the status of the belt itself.
In some cases, the problem may be in the timing strap, and the consequences of such a malfunction will be more serious. The emergence of foreign sounds can be due to wear of bearings. If the strap itself for some reason breaks, it can cause valve bending, and such a repair, in turn, requires large financial costs. Check the status of the belt itself - it should not be traces of damage, detachment or cracks. If they are available, then the strap is subject to replacement.
Rollers and bearings
The appearance of an unpleasant gross, cotton and other third-party noise can occur due to the fault of bearing devices, as well as rollers. In the engine design, not one bearing and roller is used, so it can be difficult to find the cause. From ordinary whisting sound when wear rollers and bearings will be lower, as a rule, it manifests itself on the engine idling. Moreover, when they increase, it either will disappear, or will be more quiet. The extension rollers with bearings are subject to replacement, until a more serious problem occurred (the author of the video is the IB Channel channel).
Fault intake system
Crushing and cotton, as well as cracks when starting the engine, sometimes occur due to malfunctions manifested in operation inlet system. Of course, to this option should be passed when you see the performance of bearings, rollers and belts.
So, what faults are characteristic of the inlet system:
- Throttle. This node sometimes encourages, as a result of which a specific airflow swap creates. If the appearance of a grip and cotton, as well as the whistle is due to this particular problem, the damper must be completely rinsed. Note that it will be necessary to completely dismantle for the most efficient cleaning of the node.
- The reason can also be an intake valve that is responsible for circulation of crankcase gases. If he clogged, it will lead to the impossibility of normal circulation of hot air, respectively, due to very high pressure Motor liquid may be squeezed out of seals. To get rid of such a malfunction, the valve will need to be cleared, but for this it should be removed first. Depending on the constructive features The engine, it can be located either an enable crankcase vent pipe or on the valve lid.
In the event that the valve itself is made of metal, any substances that will not scratch the surface can be used for cleaning. If the device is made of plastic, then the aggressive means is better not to use.
Failures in the work of the turbine
Most modern machines equipped with turbochargers, the purpose of which is to increase the power of the engines, as well as improve sound characteristics Auto as a whole. However, this is another component of the power unit, which can cause the appearance of tapping, grincping and cotton. If the motor starts, it is heard a knock and grinds, that is, the probability that such a problem is due to the air leakage in the place where the turbocharger and the power unit is connected. As a rule, the appearance of uncharacteristic DVS sounds speaks about the failure of the turbocharger. Such a malfunction is more characteristic of diesel units (by the author of the video channel ITC by the Turber).
Starter
If you are clearly heard, the cause of a malfunction can only be one - Bendix, which is one of the main elements of the starter, for some reason can not engage with the flywheel. Immediately, the crushes itself appears as a result of slipping teeth. It should be noted that from such a breakdown you need to get rid of as quickly as possible, otherwise there is a possibility of damage to the gear of both the flywheel and the starting node.
The following elements are subject to diagnosis:
- First of all, you should diagnose the fixture of the device - in practice, due to riding on uneven roads, the bolts that fix it can unscrew. This leads to the fact that the mechanism will resemble, respectively, the gear will lose contact with the flywheel. You need to dismantle the starting node and diagnose the state of the benks.
- If the problem lies in the wear of the gear, the efficiency of the mechanism will be significantly reduced. The scratch itself will appear as a result of a coherent benks, and if you do not come up with this problem as quickly as possible, the starter device can overpow the flywheel over time. After dismantling, if the gear really was worn out, you can see it without the help of specialists.
- There is a chance that the Bendix is \u200b\u200bbadly moved along the shaft and is not able to reach the flywheel. Try to dismantle it, and the tree is lubricate motor fluidAfter that, to install and re-check the performance of the node. It will not be superfluous to diagnose and traction relay.
Photo Gallery "Worn Starter Elements"
The first actions of the driver when the noise is accompanied from under the hood
The first thing that any car owner should do is to get rid of the cause as soon as possible. If you have repair skills, then change the belts, bearings, or you can independently. If you are going on a long trip and found such a problem before moving forward, we would advise first of all to call for a hundred and allow it. Otherwise, the malfunction can focus on the road.
Crushing in the engine at startup is a fairly common phenomenon, especially for old cars. But this malfunction has not bypassed new vehicles. The appearance of this problem is associated with the failure of one or more elements in the motor.
Causes of engine gross
When the engine starts, the engine is heard - this means that the starter does not grab. This problem Related to Bendix, retracting relay or flywheel. But if the crack is heard when the engine is started, then the case is much more complicated here and the consequences may be harder - a malfunction in the piston mechanism or in the details of the cylinder head.
Methods for diagnosing and troubleshooting
Many motorists going out in the morning and launching the engine vehicle, faced with the fact that when starting it is heard, grinds and crackle. In this case, the malfunction is different and it is worth understanding which sound, which can mean.
Starter, flywheel and retractable relay
Perhaps it is necessary to begin consideration with the fact that during the start of the power unit, it appears. As it was clarified earlier, it's about the starter or flywheel. So, if the crop is accompanied until the engine is not started, then this is due to the wear of the benks or the wint of the flywheel.
To be more accurate, then the teeth of one or the second element wear out, and the part is badly cling to the item. Also, it can be in the retractor relay that the Bendix is \u200b\u200bnot fully pulling, which does not grab the flywheel.
To eliminate the malfunction, it is necessary to dismantle the starter and inspect the condition of the Bendix, namely its teeth. If there is a characteristic wear in the form of "mucus" of teeth, it is recommended to replace the part. But, and this is not all. Also, since the starter has already been filmed from the vehicle, it is worth checking the retractable relay.
To do this, it is easy to connect it to the onboard network at 12 volts and listen - whether the retractable relay is tickling. If clicks are not heard, you will have to disassemble the starter and replace the item with the building.
Also, this malfunction and the effect of the scroll can be caused by the fact that the crown of the flywheel was worn out. It is worth noting that not all engines flywheel collapsible, so it often changes the entire part assembly. Thus, the wear of the teeth leads to the fact that the Bendix may not catch the crankshaft for them and turn the crankshaft. It is at this moment that arises grinding in the subcapor space.
Crash - where to run and what to do
Cracks - these are faults in the crank-connecting mechanism or head of the cylinder block. So, first of all, it is worth checking the GBC. Faults need to be sought in guide bushings where development could occur, and the valve simply hangs, and the hydrocomathers that can be changed, as they work out their resource.
The second place to pay attention to is the cylinder block and its elements. So, the cracks can be caused by a lack of lubricant (engine oil), as a result of which oil-changing rings scratch the cylinder walls. Also, special attention should be paid to the indigenous and skeeping insertswhich can be rotated due to the work on the details of the block.
At the same time, special attention should be paid to the state crankshafton which scratches and deep furrows could form.
The last element, which can also cause a crackling and damage the walls of the cylinders is the sleeves of rods. They could break out and go out for the preparations of pressing. In this case, the danger is that the sleeves can damage the walls of the cylinders so much, which is the only output of the block of block or its replacement.
Output
Crushing and crackling in the power unit show that some details of the motor came out. So, the crushes is accompanied by a malfunction in the starter or flywheel. As for the cod, the situation is much more complicated - most likely the problem is hidden in a crank-connecting mechanism or in the head of the cylinder block.
Often, drivers are interested in why the crack is heard and grinds when starting the engine. The reasons for this phenomenon may be several. In any case, the source of this sound should be fixed as quickly as possible. Otherwise, you risk getting a breakdown at the most inopportune moment. In general, when any incomprehensible sounds appear, their origin should be checked. After all, it is choking the whole sign of breakdown.
The sooner you eliminate it, the better. After all, most of the faults can cause a chain reaction. And provoke breakdowns of other engine elements. Therefore, always listen carefully to the operation of the power unit.
The reasons
Why when starting the engine, the cracks are heard and crushing? This question often define beginners and not very motorists. Many scares the incomprehensible sound when running the motor. Although in many cases it is not a difficult problem. But it is still necessary to eliminate, and for this it is not bad to know where to look for the problem. Seals of outstanding crackles and grinds when you start several:
- Starter;
- Flywheel;
- Roller fastening bolt (timing).
Starter
There are several reasons for such behavior. In order to figure out the reasons in more detail, you need to know the starter device and the principle of operation. It consists of electric engine, which is installed on the shaft of the overtaking clutch with the lead gear. In everyday life, the coupling and gear are called - Bendix. Also in the design there is a starting relay with a solenoid. This design is called "traction relay." Its with a coupling connects the starter switching lever.
This design works as follows.. When turned on, the electric motor begins to turn the bendix. At the same time, a traction relay, worked, moves with a lever overtaking clutch forward.
As a result, the gear comes into engaging with the teeth of the flywheel and spinning the engine. After the motor started, the overtaking clutch is triggered. It protects the starter from damage. When the current is disconnected to the device, the relay stops working, and returns to initial position. At starters passenger cars The overtaking clutch of the roller type is usually used.
The cause of the grinding at startup is only one. For some reason, Bendix can not fully cling to the flywheel. Therefore, when starting the starter, an interstitious teeth are crushing. You need to eliminate this malfunction as quickly as possible. Otherwise, you can damage the gears of the flywheel and starter. The following points must be checked:
- First, check the starter mount. Sometimes the fastening bolts can be unscrewed from vibration. In this case, the starter throws and the gear loses a full-fledged contact with the flywheel. In any case, remove the starter and check the condition of the Bendix;
- Sometimes the cause of the problem can be the wear of the gear. In this case, the efficiency of the starter is reduced. When the engine is started, the undue bench will be selected. Over time, the starter will not be able to turn the flywheel at all. After removing the item from the car, to see the wear of the gear can be naked eye;
- Sometimes Bendix goes badly on the shaft and simply does not reach the flywheel. In this case, remove it. Need to anoint shaft any motor Oil (or what will happen at hand). Also check the operation of the traction relay.
The crash at start-up may also occur due to a starter power supply challenge. It appears when weakening the attachment of the plus wire. With bad contact, a spark discharge occurs, it produces crackle. Check the wire. If necessary, tighten it.
Flywheel. The cause of the grinding can be in the engine. With a large wear of the flywheel teeth, they cannot form a full contact with the starter gear. As a result, you can hear an unpleasant gnash. It is advisable to replace the flywheel. Otherwise, the wear of Bendix will increase and you will have to regularly change it.
Since we are talking about the flywheel, read the two of our material on this topic.
