It is never pleasant to experience a noise in your car that you don’t know the cause of. So, what if you find a loud noise that remains on your Alfa Romeo 156? It is highly possible that this is a minor issue, but before beeing sure, it is better to do some verifications. Whether that loud noise comes from the front of the automobile, from the rear, whether it appears when you accelerate or when you are parked, our team has created this content to help you fix it. First, we will point out the possible explanations for the trouble according to when loud noise appears on your Alfa Romeo 156, and then we will give attention to the region of origin of the noise. In any case, if this noise remains, follow these recommendations to help you find the origin.
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When does my Alfa Romeo 156 produce a loud noise?
One way to discern a noise from your Alfa Romeo 156 is to establish when it shows up. Indeed, some trouble can be connected to components that are only stressed under certain conditions. It is this technique that we will focus on in this first part.
Loud noise Alfa Romeo 156 when accelerating
Loud noise on Alfa Romeo 156 that shows up when you are accelerating can be symptomatic of several failures. In fact, if you encounter a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will induce a much higher noise than during normal operation. Additionally, it is also highly possible that loud noise on your Alfa Romeo 156 is connected to a wheel bearing, which is one of the most common causes of these types of manifestations. Another possibility is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also possible that the issue 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 156 is stopped
If your Alfa Romeo 156 makes a loud noise while not accelerating, engine on, the issue may be linked to 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 156 and how can I be sure of its origin?
Now that we have located the source of the sound, we will concentrate on the verification step to be certain that this is the concern you are experiencing.
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The loud noise comes from the wheels of my Alfa Romeo 156
As we have seen previously, loud noise from the wheels of your Alfa Romeo 156 may be linked to two main trouble. 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 remember to examine 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 change it or them straight away. If it is a deformed tire, remember to visually check the entire tread area for linearity. If it is the balancing of the wheels of your Alfa Romeo 156 that is the matter, you will tend to feel a vibration in the direction of the vehicle as you go faster. In both cases, you will have to go to your mechanic to replace the tires or perform a balancing.
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The loud noise comes from the engine of my Alfa Romeo 156
In case you have discovered loud noise as coming from the engine of your Alfa Romeo 156, 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 156 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 examine that the engine idle speed is not random. In case you confirm one of these two trouble, take your vehicle to your garage .
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Loud noise comes from the exhaust pipe of the vehicle
If the noise you have discovered comes from the exhaust pipe of your Alfa Romeo 156, 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 Alfa Romeo 156, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To ensure 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.
