It is never relaxing to find out a noise in your vehicle that you don’t know the cause of. So, what if you find a loud noise that persists on your Alfa Romeo 147? It is very possible that this is a minor problem, but before beeing sure, it is better to carry out some verifications. Whether that loud noise comes from the front of the vehicle, from the rear, whether it happens when you accelerate or when you are parked, our team has made this article to help you solve it. First, we will describe the possible reasons for the issue according to when loud noise shows up on your Alfa Romeo 147, and then we will look into the region of origin of the noise. In any case, if this noise lasts, follow these recommendations to help you find the origin.
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When does my Alfa Romeo 147 generate a loud noise?
One way to discern a noise from your Alfa Romeo 147 is to determine when it occurs. Indeed, some complications can be connected to components that are only stressed under certain circumstances. It is this process that we will focus on in this first part.
Loud noise Alfa Romeo 147 when accelerating
Loud noise on Alfa Romeo 147 that takes place when you are accelerating can be symptomatic of different failures. In fact, if you feel a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will provoke a much higher noise than during normal operation. Furthermore, it is also highly possible that loud noise on your Alfa Romeo 147 is connected to 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 problem may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it increases speed.
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When my Alfa Romeo 147 is stopped
If your Alfa Romeo 147 makes a loud noise while not accelerating, engine on, the problem may be in connection with poor air intake. An air intake hose that has come loose or has a hole in it may be the cause.
Where does loud noise come from on my Alfa Romeo 147 and how can I be sure of its origin?
Now that we have defined the origin of the noise, we will focus on the verification step to make certain that this is the concern you are encountering.
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The loud noise comes from the wheels of my Alfa Romeo 147
As we have seen earlier in this article, loud noise from the wheels of your Alfa Romeo 147 may be in connection with two main problems. 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 consider 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 straight 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 Alfa Romeo 147 that is the issue, you will tend to feel a vibration in the direction of the vehicle as you go faster. In both circumstances, you will have to go to your mechanic to replace the tires or execute a balancing.
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The loud noise comes from the engine of my Alfa Romeo 147
In case you have identified loud noise as coming from the engine of your Alfa Romeo 147, 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 encounter a power loss during your acceleration. If the loud noise on your Alfa Romeo 147 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 disorders, take your vehicle 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 Alfa Romeo 147, it is highly possible that you have rust if your vehicle is old and has created holes in it over time and therefore generates a very high noise close to aircraft noise on your Alfa Romeo 147, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To validate this, get help from someone who will stand under the vehicle 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.
