What can be more annoying than noises when you start your vehicle… In fact, you probably already discovered noises when you start your smart fortwo and in most cases it’s frustrating. It may not be anything significant, 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 create this content to help you find its origin. To do this, first, we will see the case of noise when starting on smart fortwo but the vehicle does not start, and finally, the noise you can encounter on your vehicle if it starts, first cold and then hot.
I listen a noise when I try to start my smart fortwo, but the engine doesn’t start
I perceive a clicking noise at the start of my smart fortwo
If you listen a noise when you want to start your vehicle, and it does not want to turn on, it is likely that it is the battery that is contributing to the trouble. In fact, if you notice clicking noise when you start your smart fortwo, and it sounds like a ticking, you almost certainly lack the energy to run your starter, check your battery with a voltmeter and replace it if required. In the case that after examining your battery, you still know a noise when starting your smart fortwo and it does not want to start, browse this article about starter motor noises on smart fortwo for more details and to discover the origin of your trouble.
I perceive a noise when I start my smart fortwo but the engine it starts
I listen a noise when I start my smart fortwo
- Grinding or squealing type noises when I start cold smart fortwo :
If you listen a noise when you start your smart fortwo, 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 vehicle that is involved. In fact 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 details on the origins of injection-related noises on smart fortwo, see this content page. - Cold start friction parts smart fortwo :
If you notice cold friction noises on smart fortwo, it is pretty much 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 possible 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 replace it if required. If you have other friction noises, and it doesn’t result from your serpentine belt, we have a full article on engine of your smart fortwo.
I listen a noise when starting my smart fortwo even when hot
- rubber mount / silent bloc dead motor
If you listen a clacking noise just 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 generated by starting the engine can create starting noise on smart fortwo. Check their state and change them if required. Read this article if you would like to have detailed details on rubber mount noises on smart fortwo. - Motor flywheel
Finally, if you notice a noise that sounds a little like a crank noise when you start your smart fortwo, even when hot, it is possible that if your series is equipped with a dual-mass flywheel, it is the origin of your concerns. In fact, these parts have created a lot of concerns on many vehicles. When they take part in the game they make noise when you start your smart fortwo and when you turn off the engine. Have his state checked out by a specialist.
