It may not be unfamiliar to you, but the alternator is a fundamental component in an engine. It is he who is the guarantor of change energy the engine block of your Toyota 4Runner in Electricity supply in order to recharge the battery. If there is a problem, it could therefore essentially cause electrical failures. It is therefore important to resolve the problem. However, the problem could also be with your belt, and even pulleys. We will see through this article where will be able to come problems according to the noise that you hear.noise-alternator-toyota-4runner

Noise of the alternator belt on a Toyota Corolla

La alternator belt, also called the accessory belt, turns out to be the most important element involved in the proper functioning of the alternator. It is this one which via its convolution carries the alternator and will create electricity. But it is also used to operate other pumps of the engine block. In case it breaks, it could make damages very important in your Toyota 4runner engine.

A metallic noise on the Toyota 4runner:

It's a noise that usually comes Cold. The most common reason is that the ridges in the belt turn out to be deteriorated. But it can also occur if the pulley is slightly off-center. If ever the belt breaks it could of course break. If you ever recognize this noise, the best thing to do is change the belt and the problem will be fixed almost every time.

A high-pitched screech on the Toyota 4runner:

Indeed, it is the most common problem, as well as the least dramatic. It often comes cold, but can reappear even hot sometimes. However, it stops abruptly. This noise usually occurs when the accessory belt is not tight enough. Just the tighten and it's over. Warning, if it remains in this situation for too long, the belt could be damaged and cause more serious concern in the end. This sharp screeching also sometimes occurs in the event that the damper pulley is damaged, but it is rather rare.

A slight whistling or hissing sound on the Toyota 4runner:

This is the reverse of the previous problem. The belt is certainly too tight or even too small. You can imagine what you are going to have to do!

Alternator noise on a Toyota Corolla

When it is the alternator which creates this noise and not your belt, then the problems will be completely divergent. However, this noise you hear might have similarities compared to that of a belt, so a high hiss. The concern can arise from a electrical failure, this is relatively usual. In case the voltage useful for the proper functioning of this Toyota 4runner is usually deficient, it is usually seen when there is a lack of intensity of the warning lights or lights inside the vehicle. Assuming that the intensity squaring is excessive, it happens that the battery indicator can be turned on. So as to make a real diagnostic worry, it is useful to use a voltmeter to probe the tension on the more and the less of your battery, with the engine running of course. Assuming that the voltage turns out to be lower than that recommended by the battery, the problem could therefore come from the alternator. So it will usually have to be changed.

Conclusion:

A new alternator noise usually comes from the alternator belt, but can also come from the alternator itself. financially, an alternator belt is much cheaper than the alternator. Have a costing done at a mechanic rather than starting repairs, simply because we are in no way certain of the source of the problem. Hoping that this guide was useful for you, in this case you can post a comment. Have a good ride with your Toyota 4runner.