When you discover irregular sounds on your smart forfour you tend to stress about them. Specifically when you feel a noise when you accelerate on your smart forfour. It is right away assimilated to an engine motor issue and can therefore be severe. As we know that you do not take these complications lightly, we have made a decision to produce this document to help you find the causes and wipe out this concern as quickly as possible. To do this, we will first see what are the reasons of a high pitched noise when accelerating with my smart forfour, then what is a whistling or ratling noise at the acceleration of my smart forfour, then the origins of a noise that intensifies during acceleration and at last a noise that stops when I stop accelerating.
Ma smart forfour makes a high-pitched noise when I accelerate:
If your smart forfour produces a loud noise when you accelerate, it is quite possible that the alternator belt is the induce of your issue. You will need to determine if this noise happens abruptly and if it can stop as it started. The alternator belt is a wearing part that is used to get power to the secondary components of your smart forfour’s engine and although it is less crucial than the timing belt it can bring about engine problem if it breaks. This sound may be a symptom of a slackened belt, in which case the tensioner roller or its wear and tear may be to blame. In any case, verify the condition of your belt and its tension. If it causes this acceleration noise on smart forfour, go to your technician.
Ma smart forfour 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 accompanies the rattling noise when you accelerate with your smart forfour, it is possible that your turbo is declining and some of its components are at the end of their life. Verify it and swap it if it is the induce, otherwise you risk blockage your engine in the long run. If you perceive this blowing or whistling sound on your car, feel free to refer to this content page about turbo noises on smart forfour, if you would like more details.
If, on the other hand, you do not experience any power loss due to an humming noise on your smart forfour, it is more than likely that you have one of your junctions or air hoses that has holes. So verify the whole air supply system from your air filter to your engine to locate the starting point of this acceleration sound.
Ma smart forfour 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 smart forfour gets loud, then you will have to look at the rolling parts of your vehicle. In fact, if this loud noise does not show up when you iddle, it is necessarily related to your transmission, and, in general, to your wheels. The most known reason is the state of your bearings, so make sure to verify their condition to be sure it is not the reason of this loud noise when you accelerate. If not, go to this content page about the noises related to smart forfour noise wheels.
Ma smart forfour makes a noise when I accelerate that ends when I stop accelerating:
At last, if you encounter a noise when accelerating with your smart forfour and this noise which could be a cliking sound tends to stop when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the reason. In fact, 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 every time 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 change the clutch release bearings on your smart forfour. Look at our article on clutch noise on smart forfour for more information.
