When you come across unusual sounds on your Subaru Legacy you tend to worry about them. Specifically when you feel a noise when you accelerate on your Subaru Legacy. It is right away assimilated to an engine motor issue and can therefore be considerable. As we know that you do not take these complications lightly, we have decided to write this document to support you find the causes and eliminate this matter as quickly as possible. To do this, we will first see what are the oeigins of a high pitched noise when accelerating with my Subaru Legacy, then what is a whistling or ratling noise at the acceleration of my Subaru Legacy, then the origins of a noise that intensifies during acceleration and to finish a noise that ends when I stop accelerating.
Ma Subaru Legacy makes a high-pitched noise when I accelerate:
If your Subaru Legacy makes a loud noise when you accelerate, it is quite conceivable that the alternator belt is the reason of your issue. You will need to define if this noise appears abruptly and if it can stop as it started. The alternator belt is a wearing part that is used to bring power to the secondary components of your Subaru Legacy’s engine and although it is less important than the timing belt it can induce engine damage if it stops working. This sound may be a sign of a slackened belt, in which case the tensioner roller or its wear and tear may be to blame. In any case, check the condition of your belt and its tension. If it causes this acceleration noise on Subaru Legacy, go to your auto mechanic.
Ma Subaru Legacy makes whining noise when I accelerate:
- Rattling or whistling noise generated by the turbo
- Humming noise caused by air leakage
If you have a power loss that comes with the rattling noise when you accelerate with your Subaru Legacy, it is conceivable that your turbo is declining and some of its parts are at the end of their life. Check it and change it if it is the reason, otherwise you risk clogging your engine in the long run. If you listen to this blowing or whistling sound on your car, feel free to consult this document about turbo noises on Subaru Legacy, if you would like more information.
If, on the other hand, you do not get any power loss due to an humming noise on your Subaru Legacy, it is more than likely that you have one of your junctions or air hoses that has holes. So check the complete air supply system from your air filter to your engine to determine the origin of this acceleration sound.
Ma Subaru Legacy makes an increasingly loud noise when I accelerate:
If, on the other hand, you have the feeling that the more you gain speed, the more your noise at acceleration on Subaru Legacy gets loud, then you will have to think about the rolling parts of your automobile. Indeed, if this loud noise does not occur when you iddle, it is surely in connection with your transmission, and, in general, to your wheels. The most known reason is the state of your bearings, so don’t forget to check their state to ensure that it is not the reason of this loud noise when you accelerate. If not, go to this document about the noises related to Subaru Legacy noise wheels.
Ma Subaru Legacy generates a noise when I accelerate that ends when I stop accelerating:
To finish, if you encounter a noise when accelerating with your Subaru Legacy and this noise which could be a cliking sound tends to end when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the reason. Indeed, the clutch release bearings must be swapped almost every 120 000 / 130 000km. To evaluate it, you just have to see if you have more difficulty than usually shifting gears, if you feel a resistance either stronger or non-existent in the clutch pedal. If you have any of these symptoms, go to your auto technician to swap the clutch release bearings on your Subaru Legacy. Go through our article on clutch noise on Subaru Legacy for more information.
