Did you ever had this trouble trying to start your car in the morning and it doesn’t work ? If that didn’t happen to you, at minimum you’ve already had that fear. So when you perceive an alternator noise on Subaru Impreza, you can already see yourself breaking down, stuck awaiting the tow truck. That’s why our team has decided to write this content to help you locate the origins of alternator sounds. In this article, you will first learn the role and operation of the alternator in your Subaru Impreza and then what the causes and solutions to alternator noise on Subaru Impreza may be.
Role and alternator operation Subaru Impreza
Alternator role
Your alternator is an vital component of your Subaru Impreza. Indeed, its goal is to generate power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the goal of charging the battery once the car is in motion, to provide power to the car in motion and to allow you to always have a sufficient energy reserve to be able to restart the next time.
Alternator functioning
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The alternator operates on an electrical principle that has been used for decades, the concept of copper coil wound around a magnet . This coil while rotating makes electricity. It is the engine motor itself that will give the energy required by the alternator to produce the energy, via the accessory belt or alternator belt. When your Subaru Impreza engine stops, the battery takes over to give the car with energy.
What are the several alternator noises or sounds on my Subaru Impreza and what are the causes?
I listen to a knocking noise originating from the alternator of my Subaru Impreza
One of the typical noises of a tired alternator on Subaru Impreza is a knocking noise. This alternator sound on Subaru Impreza will most of the time appear when your engine is idling, it can be connected to voltage drops that could affect the normal operation of electrical parts such as headlights for example. In many cases, it is a of both bearings of the alternator that is defective, to check it, use a multimeter on the terminals of your car with the engine running and you must obtain a value between 12 and 14.7 volts, which means that your alternator is charging your battery well. If the value is lower, the alternator of your Subaru Impreza is tired and you should consider swapping the bearing if it is the only cause otherwise the complete part.
I perceive a grinding noise coming from the alternator of my Subaru Impreza
If you are in the case where the alternator of your Subaru Impreza causes grinding sounds, in this circumstance you will have to look at it more seriously. This sign can testify as for the knocking sound of a tired bearing, but usually, we often notice by looking more meticulously that it is the accessory belt that is loosened or worn and is therefore the cause of it. In this circumstance, we advise that you read this article to find all the necessary details to solve an accessory belt noise on Subaru Impreza.
I perceive a loud noise from the alternator of my Subaru Impreza
Finding out a loud noise from the alternator of your Subaru Impreza is quite typical, in fact, it emits an audible sound when producing the electrical pulses it generates. It is up to you to check that the battery indicator light on your dashboard does not appear, and that you do not have a voltage drop when your engine is running (headlight or dashboard light that jumps for example. If this noise is too loud, we advise that you take a look at this article to find other ways to solve problem of noises from front end on Subaru Impreza.
