It is never pleasant to notice a sound in your vehicle that you don’t know the origin of. So, what if you detect a loud noise that is persistant on your Volkswagen Polo 4? It is highly possible that this is a minor trouble, but before beeing sure, it is better to operate some verifications. Whether that loud noise comes from the front of the automobile, from the rear, whether it shows up when you accelerate or when you are parked, our team has created this content to help you fix it. First, we will summarize the possible reasons for the problem according to when loud noise shows up on your Volkswagen Polo 4, and then we will concentrate on the region of origin of the noise. In any case, if this noise persists, follow these advice to help you find the origin.
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When does my Volkswagen Polo 4 make a loud noise?
One way to identify a noise from your Volkswagen Polo 4 is to determine when it shows up. Indeed, some concerns can be connected to parts that are only stressed under certain types of conditions. It is this method that we will focus on in this first part.
Loud noise Volkswagen Polo 4 when accelerating
Loud noise on Volkswagen Polo 4 that shows up when you are accelerating can be symptomatic of several failures. Indeed, if you feel a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will generate a much higher noise than during normal operation. Moreover, it is also highly possible that loud noise on your Volkswagen Polo 4 is associated with a wheel bearing, which is one of the most common causes of these types of signs of illness. Another possibility is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also possible that the trouble may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it gains speed.
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When my Volkswagen Polo 4 is stopped
If your Volkswagen Polo 4 makes a loud noise while not accelerating, engine on, the trouble may be linked to poor air intake. An air intake hose that has come loose or has a hole in it may be the induce.
Where does loud noise come from on my Volkswagen Polo 4 and how can I be sure of its origin?
Now that we have located the origin of the sound, we will focus on the verification step to be certain that this is the issues you are encountering.
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The loud noise comes from the wheels of my Volkswagen Polo 4
As we have seen before, loud noise from the wheels of your Volkswagen Polo 4 may be linked to two main disorders. If it is one of your tired bearings, it will tend to make a thumping noise that intensifies when it is under stress (spins faster and faster). So bear in mind to verify by driving “fast” (neutral gear on and window open to hear only the noise of the wheels) that the noise is located here, if this is the case swap it or them right away. If it is a deformed tire, don’t forget to visually check the entire tread area for linearity. If it is the balancing of the wheels of your Volkswagen Polo 4 that is the trouble, you will tend to feel a vibration in the direction of the car as you go faster. In both situations, you will have to go to your technician to swap the tires or perform a balancing.
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The loud noise comes from the engine of my Volkswagen Polo 4
In case you have discovered loud noise as coming from the engine of your Volkswagen Polo 4, the two most likely causes are turbo and air intake. In the first case, a turbo failure may also be connected to a compression loss during the engine ramp-up phase, so you should experience a power loss during your acceleration. If the loud noise on your Volkswagen Polo 4 is related to air intake, the check will be done mainly visually, check all your air intake hoses by a visual control in your engine block to be sure that it is not damaged or disconnected which would generate an air intake, if it is just disconnected you can reconnect the air intake tubes yourself. Then verify that the engine idle speed is not random. In case you confirm one of these two problems, take your car to your service garage .
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Loud noise comes from the exhaust pipe of the vehicle
If the noise you have detected comes from the exhaust pipe of your Volkswagen Polo 4, it is highly possible that you have rust if your automobile is old and has created holes in it over time and therefore generates a very high noise close to aircraft noise on your Volkswagen Polo 4, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To confirm this, get help from someone who will stand under the automobile while you accelerate to find the exact area of source of this noise. If it is a hole, you can repair it with a putty provided for this purpose, or, if it is a collar, “reattach” it. If it is cut or the hole is too big, it is better to get closer to your mechanic.
