Did you ever had this trouble trying to start your car in the morning and it doesn’t work ? If it never happened to you , at least you’ve already had that apprehension. So when you discover an alternator noise on Alfa Romeo Giulietta, you can already see yourself breaking down, stuck waiting for the tow truck. That’s why our team has decided to write this post to support you find the origins of alternator sounds. In this article, you will first see the role and operation of the alternator in your Alfa Romeo Giulietta and then what the causes and solutions to alternator noise on Alfa Romeo Giulietta may be.
Role and alternator operation Alfa Romeo Giulietta
Alternator role
Your alternator is an fundamental part of your Alfa Romeo Giulietta. In fact, its goal is to generate power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the task of charging the battery once the vehicle is in motion, to provide power to the vehicle in motion and to allow you to always have a enough 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 principle of copper coil wound around a magnet . This coil while spinning generates electricity. It is the engine itself that will provide the energy required by the alternator to produce the energy, via the accessory belt or alternator belt. When your Alfa Romeo Giulietta engine stops, the battery takes over to provide the vehicle with energy.
What are the different alternator noises or sounds on my Alfa Romeo Giulietta and what are the causes?
I discover a knocking noise from the alternator of my Alfa Romeo Giulietta
One of the characteristic noises of a tired alternator on Alfa Romeo Giulietta is a knocking noise. This alternator sound on Alfa Romeo Giulietta will most of the time happen when your engine is idling, it can be linked to voltage drops that could affect the normal operation of electrical components such as headlights for example. Often, it is a of both bearings of the alternator that is faulty, to examine it, use a multimeter on the terminals of your vehicle with the engine running and you must get 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 Alfa Romeo Giulietta is tired and you should think about replacing the bearing if it is the only reason otherwise the whole part.
I discover a grinding noise coming from the alternator of my Alfa Romeo Giulietta
If you are in the situation where the alternator of your Alfa Romeo Giulietta produces grinding sounds, in this case you will have to look at it more seriously. This symptom can testify as for the knocking sound of a tired bearing, however , in most cases, we often see by looking more closely that it is the accessory belt that is loosened or worn and is therefore the reason of it. In this case, we advise that you read this article to find all the necessary information to solve an accessory belt noise on Alfa Romeo Giulietta.
I discover a loud noise from the alternator of my Alfa Romeo Giulietta
Hearing a loud noise from the alternator of your Alfa Romeo Giulietta is quite regular, in fact, it emits an audible sound when creating the electrical pulses it generates. It is up to you to examine 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 go to this article to find other ways to solve problem of noises from front end on Alfa Romeo Giulietta.
