What could be more frustrating than noises when you start your car… Indeed, you plausibly already heard noises when you start your BMW 3 Series and usually it’s frustrating. It could not be anything serious, but each new engine starts usually turns into a scary moment during which you don’t know if your engine will start. That is why our editorial staff has made the decision to produce this document to support you find its origin. To do this, first, we will see the case of noise when starting on BMW 3 Series but the car does not start, and finally, the noise you can encounter on your car if it starts, first cold and then hot.
I notice a noise when I try to start my BMW 3 Series, but the engine doesn’t start
I pay attention to a clicking noise at the start of my BMW 3 Series
If you notice a noise when you want to start your car, and it does not want to turn on, it is most likely that it is the battery that is causing the issue. Indeed, if you hear clicking noise when you start your BMW 3 Series, and it sounds like a ticking, you almost certainly lack the energy to run your starter, test your battery with a voltmeter and change it if necessary. In the event that after looking at your battery, you still experience a noise when starting your BMW 3 Series and it does not want to start, read this article content about starter motor noises on BMW 3 Series for more info and to discover the origin of your issue.
I acknowledge a noise when I start my BMW 3 Series but the engine it starts
I notice a noise when I start my BMW 3 Series
- Grinding or squealing type noises when I start cold BMW 3 Series :
If you notice a noise when you start your BMW 3 Series, and this noise sounds like grinding or squealing noise, which can also be related to vibrations, it is conceivable that it is the combustion of your car that is involved. Indeed if you have an air/fuel mixture that is not good the normal performance of the engine will be altered. Check the state of your injectors and air intake system. For more info on the origin of injection-related noises on BMW 3 Series, read this content page.
- Cold start friction parts BMW 3 Series :
If you know cold friction noises on BMW 3 Series, it is almost certain that they come from one of your belts. Either the serpentine belt starts to wear out and therefore causes a friction noise. It is also conceivable that the tensioner roller or damper pulley is worn out and that as a result the extension belt provoke a friction noise, often when cold. Visually check your belt and change it if needed. If you have other friction noises, and it doesn’t originate from your serpentine belt, we have a full article content on engine of your BMW 3 Series.
I notice a noise when starting my BMW 3 Series even when hot
- rubber mount / silent bloc dead motor
If you notice a clacking noise just as you start your car’s engine and it is more than 100,000 km long, it is conceivable that some of your engine silentblocks or rubber mounts are expired. And the huge vibrations generated by starting the engine can create starting noise on BMW 3 Series. Check their state and replace them if needed. Read this article content if you would like to have detailed info on rubber mount noises on BMW 3 Series.
- Motor flywheel
Finally, if you have a noise that sounds a little like a crank noise when you start your BMW 3 Series, even when hot, it is conceivable that if your series is equipped with a dual-mass flywheel, it is the origin of your problems. Indeed, these parts have created a lot of problems on many cars. When they take part in the game they generate noise when you start your BMW 3 Series and when you turn off the engine. Have his state examined by a mecanist.