When you detect irregular noises on your BMW 7 Series you tend to concerns about them. Especially when you feel a noise when you accelerate on your BMW 7 Series. It is immediately assimilated to an engine trouble and can therefore be critical. As we know that you do not take these trouble lightly, we have decided to write this content to support you find the causes and eradicate this issues as quickly as possible. To do this, we will first see what are the reasons of a high pitched noise when accelerating with my BMW 7 Series, then what is a whistling or ratling noise at the acceleration of my BMW 7 Series, then the origins of a noise that intensifies during acceleration and to finish a noise that ends when I stop accelerating.
Ma BMW 7 Series makes a high-pitched noise when I accelerate:
If your BMW 7 Series produces a loud noise when you accelerate, it is quite plausible that the alternator belt is the reason of your trouble. You will need to define if this noise takes place abruptly and if it can stop as it started. The alternator belt is a wearing part that is utilized to bring power to the secondary components of your BMW 7 Series’s engine and although it is less crucial than the timing belt it can bring about engine troubles if it stops working. This sound may be a symptom of a slackened belt, in which case the tensioner roller or its wear and tear may be responsible. In any case, examine the state of your belt and its tension. If it causes this acceleration noise on BMW 7 Series, go to your auto mechanic.
Ma BMW 7 Series makes whining noise when I accelerate:
- Rattling or whistling noise created by the turbo
- Humming noise caused by air leakage
If you have a power loss that occurs with the rattling noise when you accelerate with your BMW 7 Series, it is plausible that your turbo is screwing up and some of its elements are at the end of their life. Examine it and change it if it is the reason, otherwise you risk blockage your engine in the long run. If you discover this blowing or whistling sound on your car, feel free to refer to this article about turbo noises on BMW 7 Series, if you would like more info.
If, on the other hand, you do not get any power loss due to an humming noise on your BMW 7 Series, it is more than likely that you have one of your junctions or air hoses that has holes. So examine the entire air supply system from your air filter to your engine to determine the origin of this acceleration sound.
Ma BMW 7 Series produces 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 BMW 7 Series gets loud, then you will have to check the rolling parts of your car. In fact, if this loud noise does not occur when you iddle, it is surely connected to your transmission, and, in general, to your wheels. The most common cause is the state of your bearings, so make sure you examine their condition to ensure that it is not the cause of this loud noise when you accelerate. If not, go to this document about the noises related to BMW 7 Series noise wheels.
Ma BMW 7 Series makes a noise when I accelerate that ends when I stop accelerating:
Finally, if you encounter a noise when accelerating with your BMW 7 Series 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 cause. In fact, the clutch release bearings must be changed approximately 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 manifestations, go to your auto technician to change the clutch release bearings on your BMW 7 Series. Read our article on clutch noise on BMW 7 Series for more information.
