What can be more distressing than noises when you start your automobile… Indeed, you probably already noticed noises when you start your BMW 7 Series and usually it’s frustrating. It may not be anything significant, but each new engine starts usually will turn into a scary moment during which you don’t know if your engine will start. That is why our team has decided to compose this content page to support you find its source. To do this, first, we will see the case of noise when starting on BMW 7 Series but the automobile does not start, and finally, the noise you can feel on your automobile if it starts, first cold and then hot.
I notice a noise when I try to start my BMW 7 Series, but the engine doesn’t start
I detect a clicking noise at the start of my BMW 7 Series
If you notice a noise when you want to start your automobile, and it does not want to turn on, it is likely that it is the battery that is triggering the problem. Indeed, if you perceive clicking noise when you start your BMW 7 Series, and it sounds like a ticking, you almost certainly lack the energy to run your starter, check your battery with a voltmeter and change it if required. In the event that after examining your battery, you still experience a noise when starting your BMW 7 Series and it does not want to start, refer to this article content about starter motor noises on BMW 7 Series for more info and to discover the origin of your problem.
I listen to a noise when I start my BMW 7 Series but the engine it starts
I notice a noise when I start my BMW 7 Series
- Grinding or squealing type noises when I start cold BMW 7 Series :
If you notice a noise when you start your BMW 7 Series, and this noise is like grinding or squealing noise, which can also be related to vibrations, it is possible that it is the combustion of your automobile that is involved. Indeed if you have an air/fuel mixture that is not good the normal operation of the engine will be altered. Examine the condition of your injectors and air intake system. For more info on the origin of injection-related noises on BMW 7 Series, read this piece of content. - Cold start friction parts BMW 7 Series :
If you notice cold friction noises on BMW 7 Series, it is almost sure 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 possible that the tensioner roller or damper pulley is worn out and that as a result the extension belt causes a friction noise, often when cold. Visually check your belt and change it if necessary. 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 7 Series.
I notice a noise when starting my BMW 7 Series even when hot
- rubber mount / silent bloc dead motor
If you notice a clacking noise when you start your car’s engine and it is more than 100,000 km long, it is possible that some of your engine silentblocks or rubber mounts are dead. And the huge vibrations made by starting the engine can make starting noise on BMW 7 Series. Examine their condition and swap them if necessary. Read this article content if you would like to have detailed info on rubber mount noises on BMW 7 Series. - Motor flywheel
Finally, if you notice a noise that sounds a little like a crank noise when you start your BMW 7 Series, even when hot, it is possible that if your series is equipped with a dual-mass flywheel, it is the origin of your trouble. Indeed, these parts have created a lot of trouble on many cars. When they take part in the game they generate noise when you start your BMW 7 Series and when you turn off the engine. Have his condition checked out by a professional.
