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Dealing With Alternator Bearing Noise? Here Is Everything You Would Want To Know

Everyone likes their cars running smoothly with all the accessories and hardware functioning in place. What keeps them working? Undoubtedly, it is the alternator. This is a coconut-sized device that circulates electrical energy through all the workable hardware of the vehicle. There may be times when alternator bearing noise may become a matter of concern.

While you may relate it to the forthcoming failure, knowing the exact scenario can prove to be a boon.

Diving Deeper Into The Case Of Alternator Bearing Noise

If you have a malfunctioning alternator at your disposal, the car’s battery is likely to get affected. Be it dirt or the change in climatic conditions; alternators may wear out with time. In turn, squealing alternator bearings could be something that dominates your thoughts.

Conjecturing can add on the stress but by having the required knowledge, you can work through the problem.

1. What Is An Alternator?

A part of the automotive charging mechanism, an alternator generates electrical power for the various components of the vehicle. The device is a lightweight one and smaller in dimensions. The alternator is positioned near the engine’s front and capable of producing alternating current with the help of a process called electromagnetism.

Talking about its working, when the engine is given a run, the crankshaft impels the drive belt. This, in turn, leads to the spinning of the pulley present on the rotor shaft. As a result, the alternator transmits mechanical energy from the engine to car’s accessories in the form of electrical energy. There may arise a time when alternator bearings noise may give you sleepless nights. Let’s find out why that happens.

Points to remember about alternator bearing noise
How to Identify the alternator bearing noise

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2. The Bearings Failure

One of the most familiar failures that the alternator is susceptible to is the bearings failure. The alternator works in a way that all the parts within it rotate to produce electrical power. One of such components is the bearings needles that, in turn, facilitate free spinning of the rotor within the stator.

When the bearings tend to fail, the rotor spinning would be directly hindered. This may happen due to the heat and dirt accumulation around the alternator. You’ll notice a grinding noise that may further lead to the alternator failure. That is why it is important to look into the issue as soon as possible rather than leaving things for tomorrow.

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3. The Certainty Test

When the alternator making noise is something that is bothering you, running a certainty test can come in handy. One of such tests involves jump starting the car. Once the car’s engine starts, do away with the jumper cables. In case, the car’s engine halts soon after, the alternator is at fault. And, in case the car continues to run, the battery may require charging.

Another test is the headlight check. Start the car and tell someone to check the headlights. Maintain the car in the “park mode” and depress the accelerator pedal. If the headlights tend to faint or if they turn off completely, the alternator is at fault. You may also go through maintenance tips for consequences of a bad car battery.

Know the reason of alternator bearing noise
Misconceptions about alternator bearing noise

Wrapping Up

If you are dealing with alternator bearing noise, replacing the bearings or the alternator altogether is recommended. It would be in the best of your interest to contact an expert. One should understand that some problems are better handled by professionals who can fix the issue in no time and that too effectively.

1 Comment
  1. Rico says

    I ve question
    What the different between pulley n bearing ?
    Are they a different parts?
    Lastly, my car make noise when i start to move, n they change alternator pulley, after 2 weeks my car start make a different noise when i brake while the gear on D, they say must change alternator bearing ??

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