It is never pleasant to find out a noise from your car you don’t know where from. Thus what if you locate a serpentine belt noise that stays on your BMW 3 Series? It is extremely conceivable that this is a unimportant trouble, but before being sure, it is better to carry out some checks. If this belt noise comes from your serpentine or driving belt, our team has written a document to help you locating and repairing it. First, we will look at the serpentine belt noises on your BMW 3 Series and then we will check out the sources of these sounds.serpentine-belt-noise-bmw-3-series

I feel noises from serpentine belt BMW 3 Series

The best strategy to check the state of your belts is to listen to your automobile. Immediately after you find sounds such as squealing or bells, you should take a closer look to verify their origin. The role of the serpentine belt or driving belt of your BMW 3 Series is to transfer the movement of the engine to the secondary elements that it will supply with energy. Like steering, air conditioning, water pump. Its role is therefore fundamental in the normal functionality of your automobile. The serpentine belt is said to be asynchronous, i.e. unlike the timing belt, it has the capacity to drive distinctive engine elements at variable speeds.

I find out squealing noises on my serpentine belt BMW 3 Series

This sort of squealing belt noises on BMW 3 Series, which will often be acute, can in most cases arise when the engine is cold, or when the acceleration increases in intensity. . This sort of sound must be significant and it is often quite simple to associate it with one of these belts. To verify, do not hesitate to open your bonnet, engine running cold and check the origin of this noise, the serpentine or driving belt being accessible, it should not be too difficult for you to identify a belt noise on your BMW 3 Series. The reason of this trouble can be connected to the damper pulley, which works as a damper to eradicate irregularities in the tension in the motor cycle and therefore in the energy transmission to the belt. This results in a loose belt that will jerk. However, you still have an opportunity that this event is annodine. As the serpentine belt of your BMW 3 Series is exposed, it may squeak due to excessive humidity due to weather conditions and it may stop with a change in conditions. Remember to verify the state of your belt (crack, crack), if this is the case swap it, otherwise simply tighten the belt.

I find out loud serpentine or driving belt noises BMW 3 Series

Just like squealing, a driving belt noise on your BMW 3 Series that sounds like a loud grinding sound can say a lot about its state. It is therefore imperative that you look further and find the reason for this sound that can indicate the end of your belt’s life. Like squealing noise, it can be identified in most cases when cold . It generally means a worn pulley whose streaks no longer allow it to be driven correctly. Other alternatives, the dynamic belt tensioner or the disengageable pulley of the alternator may be at the origin of this trouble. Don’t forget to verify first the serpentine/driving belt which in most cases is the reason of this trouble, otherwise it will be necessary to swap the tensioner or pulley.

I find out bearing noises on the serpentine belt of my BMW 3 Series

Finally, if in your case you identify a bearing belt noise on BMW 3 Series, it is conceivable that it is connected to a serpentine belt that is too tight . Indeed, it is conceivable that its size may be smaller than prescribed and cause the entire system to overvoltage, resulting in this whistling noise or slight rolling noise. The problem in this case is that the bearing bearings or the Damper pulley may fail . Remember, therefore, to stretch the belt to limit the risks or to replace it if it is too short. If after checking all thoses alternatives, you still detect a belt noises, read our article about timing belt noises on BMW 3 Series which could maybe help you.