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 find out an alternator noise on Audi S4, you can already imagine yourself breaking down, stuck awaiting the tow truck. That’s why our team has decided to produce this content to help you find the origins of alternator sounds. In this article, you will first discover the role and operation of the alternator in your Audi S4 and then what the causes and solutions to alternator noise on Audi S4 may be.
Role and alternator operation Audi S4
Alternator role
Your alternator is an important component of your Audi S4. Indeed, its task is to give power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the task of recharging the battery once the car is in motion, to provide power to the car in motion and to let you to always have a sufficient energy reserve to be able to restart the next time.
Alternator functioning
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The alternator works on an electrical principle that has been used for decades, the principle of copper coil wound around a magnet . This coil while spinning creates electricity. It is the engine motor itself that will provide the energy requested by the alternator to produce the energy, via the accessory belt or alternator belt. When your Audi S4 engine stops, the battery takes over to provide the car with energy.
What are the different alternator noises or sounds on my Audi S4 and what are the causes?
I listen to a knocking noise caused by the alternator of my Audi S4
One of the characteristic noises of a tired alternator on Audi S4 is a knocking noise. This alternator sound on Audi S4 will generally show up when your engine is idling, it can be linked to voltage drops that could disturb 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 faulty, to examine 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 recharging your battery well. If the value is lower, the alternator of your Audi S4 is tired and you should consider replacing the bearing if it is the only reason otherwise the whole part.
I find out a grinding noise coming from the alternator of my Audi S4
If you are in the situation where the alternator of your Audi S4 generates grinding sounds, in this circumstance you will have to look into it more seriously. This symptom can testify as for the knocking sound of a tired bearing, however , in most cases, we generally see by looking more strongly that it is the accessory belt that is loosened or worn and is therefore the reason of it. In this circumstance, we suggest that you look for advice this content to find all the necessary information to solve an accessory belt noise on Audi S4.
I find out a loud noise from the alternator of my Audi S4
Experiencing a loud noise from the alternator of your Audi S4 is quite typical, in fact, it produces an audible sound when producing the electrical pulses it generates. It is up to you to examine that the battery indicator light on your dashboard does not show up, 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 suggest that you have a look this content to find other ways to solve problem of noises from front end on Audi S4.
