Predict a malfunction based on the sound of the engine?
- June 21, 2022
- 0
If strange noises and noises are heard from under the hood when starting the engine to a cold engine, then this is a cause for action. However, with
If strange noises and noises are heard from under the hood when starting the engine to a cold engine, then this is a cause for action. However, with some you can easily diagnose the problem without opening the hood. The AvtoVzglyad portal found out how, without an ear for music, to determine the malfunction of a particular node in the engine compartment.
Most of the car’s main working units are located under the hood. Sometimes they can fail, and they do it rather slowly, making various noises and strange noises that will scare an unprepared driver. Some of them can be heard during a cold start of the engine. Others are busy with his work. But either way, they all tell us about problems that need solving. And to know where to look, it is necessary to study the “music notation” of noises that can come from the side of the engine compartment.
So if you started the engine and there was an immediate creak or squeak from under the hood, most likely it was the drive belts of various attachments “singing”. On some cars a break in some doesn’t bode well, but on most modern cars this can become a real problem with subsequent expensive repairs. Professional drivers and military personnel unanimously argue that after hearing such noises from the engine compartment, you should first inspect the condition of the belts, and then, if everything is in order, tighten them. With noticeable wear, the belts change – no options.
Starting failures are accompanied by clicking or buzzing. If the take-up reel breaks, there will be a buzzing sound in the cab. In this case, the engine will not start. Clicking means that, most likely, the battery in the car is dead and the starter just doesn’t have enough charge to fully work and start the drive unit.
If the car has not been properly maintained, for example low-quality oil has been used or has been replaced less often than the car manufacturer has stated, something may crack under the hood. Such sounds, as a rule, are emitted by a dying phase shifter. Yes, a node that can safely move 200,000 km can be killed quite easily. And if it’s unreliable at first, then it’s very simple.
The tendency of automakers, especially German ones, to earn more and spend less has resulted in the piston skirts of their engines getting shorter. This allows them to touch the cold. However, if no maslozhora is observed, it is considered normal operation. After the engine has warmed up, the noise will disappear.
But if the Korean auto industry ticks like this, then this is a reason to tense – you need to check the engine for scratches in the cylinders. If they appeared, then this is already a repair and an expensive one.
The timing chain (distribution) may also be correct. The reason for this is a strong stretch or incorrect operation of the tensioners. The circuit must be checked immediately. And if the stretching is detected, it is better to stop the operation of the car until the malfunction is resolved.
The engine’s valve system also has something to knock on. Valves do this when they are cold because of the changed valve clearances. The sound may disappear after warming up. But this does not mean the normal operation of the system, and the gaps need to be checked and adjusted.
A strong knock under the release of gas is a clinic for the engine. And baby. This is how the crankshaft bearings turn.
Knocking under the hood is also possible with diesel engines. For example, in the event of a leak in the fuel injector. The sound may decrease after warming up. However, we do not recommend leaving it unattended. It just gets worse and more expensive.
Listen to the heart of your car. It should make smooth rhythmic sounds without extraneous noise. If there are, you need to fix the problem as soon as possible. In a car parts shortage situation, it is a crime to ignore the most important and expensive unit in your car. It is much easier to repair one part than to repair the whole engine later.
Photo: AvtoVzglyad
Under the hood are most of the car’s main working units. Sometimes they can fail, and they do it rather slowly, making various noises and strange noises that will scare an unprepared driver. Some of them can be heard during a cold start of the engine. Others are busy with his work. But either way, they all tell us about problems that need solving. And to know where to look, it is necessary to study the “music notation” of noises that can come from the side of the engine compartment.
So if you started the engine and there was an immediate creak or squeak from under the hood, most likely it was the drive belts of various attachments “singing”. On some cars a break in some doesn’t bode well, but on most modern cars this can become a real problem with subsequent expensive repairs. Professional drivers and military personnel unanimously argue that after hearing such noises from the engine compartment, you should first inspect the condition of the belts, and then, if everything is in order, tighten them. With noticeable wear, the belts change – no options.
Starting failures are accompanied by clicking or buzzing. If the take-up reel breaks, there will be a buzzing sound in the cab. In this case, the engine will not start. Clicking means that, most likely, the battery in the car is dead and the starter just doesn’t have enough charge to fully work and start the drive unit.
If the car has not been properly maintained, for example low-quality oil has been used or has been replaced less often than the car manufacturer has stated, something may crack under the hood. Such sounds, as a rule, are emitted by a dying phase shifter. Yes, a node that can safely move 200,000 km can be killed quite easily. And if it’s unreliable at first, then it’s very simple.
The tendency of automakers, especially German ones, to earn more and spend less has resulted in the piston skirts of their engines getting shorter. This allows them to touch the cold. However, if no maslozhora is observed, it is considered normal operation. After the engine has warmed up, the noise will disappear.
But if the Korean auto industry ticks like this, then this is a reason to tense – you need to check the engine for scratches in the cylinders. If they appeared, then this is already a repair and an expensive one.
The timing chain (distribution) may also be correct. The reason for this is a strong stretch or incorrect operation of the tensioners. The circuit must be checked immediately. And if the stretching is detected, it is better to stop the operation of the car until the malfunction is resolved.
The engine’s valve system also has something to knock on. Valves do this when they are cold because of the changed valve clearances. The sound may disappear after warming up. But this does not mean the normal operation of the system, and the gaps need to be checked and adjusted.
A strong knock under the release of gas is a clinic for the engine. And baby. This is how the crankshaft bearings turn.
Knocking under the hood is also possible with diesel engines. For example, in the event of a leak in the fuel injector. The sound may decrease after warming up. However, we do not recommend leaving it unattended. It just gets worse and more expensive.
Listen to the heart of your car. It should make smooth rhythmic sounds without extraneous noise. If there are, you need to fix the problem as soon as possible. In a car parts shortage situation, it is a crime to ignore the most important and expensive unit in your car. It is much easier to repair one part than to repair the whole engine later.
Source: Avto Vzglyad
I’m Sandra Torres, a passionate journalist and content creator. My specialty lies in covering the latest gadgets, trends and tech news for Div Bracket. With over 5 years of experience as a professional writer, I have built up an impressive portfolio of published works that showcase my expertise in this field.
