It is never relaxing to notice a sound in your car that you don’t know the source of. So, what if you identify a loud noise that persists on your Toyota 4Runner? It is very possible that this is a minor issue, but before beeing sure, it is better to carry out some checks. Whether that loud noise comes from the front of the vehicle, from the rear, whether it appears when you accelerate or when you are parked, our team has made this content to help you fix it. First, we will summarize the possible explanations for the issue according to when loud noise appears on your Toyota 4Runner, and then we will focus on the region of origin of the noise. In any case, if this noise persists, follow these advice to help you find the source.
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When does my Toyota 4Runner make a loud noise?
One way to discover a noise from your Toyota 4Runner is to establish when it occurs. Indeed, some concerns can be connected to parts that are only stressed under certain conditions. It is this process that we will focus on in this first part.
Loud noise Toyota 4Runner when accelerating
Loud noise on Toyota 4Runner that starts when you are accelerating can be symptomatic of different 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 provoke a much higher noise than during normal operation. Furthermore, it is also highly possible that loud noise on your Toyota 4Runner is connected to a wheel bearing, which is one of the most common origins of these types of symptoms. 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 Toyota 4Runner is stopped
If your Toyota 4Runner makes a loud noise while not accelerating, engine on, the issue may be related 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 Toyota 4Runner and how can I be sure of its origin?
Now that we have uncovered the source of the sound, we will concentrate on the verification step to ensure that this is the concern you are enduring.
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The loud noise comes from the wheels of my Toyota 4Runner
As we have seen previously, loud noise from the wheels of your Toyota 4Runner may be related to 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 check 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 as soon as possible. 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 Toyota 4Runner that is the problem, 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 do a balancing.
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The loud noise comes from the engine of my Toyota 4Runner
In case you have discovered loud noise as coming from the engine of your Toyota 4Runner, 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 Toyota 4Runner 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 check that the engine idle speed is not random. In case you confirm one of these two problems, 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 Toyota 4Runner, 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 Toyota 4Runner, 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 vehicle while you accelerate to find the exact area of starting point 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.
