What could be more disturbing than noises when you start your vehicle… Indeed, you plausibly previously came across noises when you start your smart forfour and in general it’s frustrating. It could not be anything serious, but each new engine starts usually becomes a scary moment during which you don’t know if your engine will start. That is why our team has chosen to prepare this content to help you find its origin. To do this, first, we will see the case of noise when starting on smart forfour but the vehicle does not start, and finally, the noise you can feel on your vehicle if it starts, first cold and then hot.
I experience a noise when I try to start my smart forfour, but the engine doesn’t start
I pay attention to a clicking noise at the start of my smart forfour
If you experience 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 causing the issue. Indeed, if you perceive clicking noise when you start your smart forfour, and it sounds like a ticking, you most likely lack the energy to run your starter, check your battery with a voltmeter and change it if required. In case that after examining your battery, you still encounter a noise when starting your smart forfour and it does not want to start, read this article content about starter motor noises on smart forfour for more details and to discover the source of your issue.
I hear a noise when I start my smart forfour but the engine it starts
I experience a noise when I start my smart forfour
- Grinding or squealing type noises when I start cold smart forfour :
If you experience a noise when you start your smart forfour, and this noise sounds like grinding or squealing noise, which can also be linked to vibrations, it is conceivable that it is the combustion of your vehicle that is involved. Indeed if you have an air/fuel mixture that is not good the normal operation of the engine will be altered. Check the state of your injectors and air intake system. For more details on the origin of injection-related noises on smart forfour, read this piece of content. - Cold start friction parts smart forfour :
If you notice cold friction noises on smart forfour, it is almost sure that they come from one of your belts. Either the serpentine belt starts to wear out and therefore triggers 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 causes a friction noise, often when cold. Visually check your belt and change it if required. If you have other friction noises, and it doesn’t result from your serpentine belt, we have a full article content on engine of your smart forfour.
I experience a noise when starting my smart forfour even when hot
- rubber mount / silent bloc dead motor
If you experience a clacking noise when 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 good to be replaced. And the huge vibrations made by starting the engine can create starting noise on smart forfour. Check their state and swap them if required. Read this article content if you would like to have detailed details on rubber mount noises on smart forfour. - Motor flywheel
Finally, if you hear a noise that sounds a little like a crank noise when you start your smart forfour, even when hot, it is conceivable that if your series is equipped with a dual-mass flywheel, it is the source of your trouble. Indeed, these parts have created a lot of trouble on many cars. When they take part in the game they make noise when you start your smart forfour and when you turn off the engine. Have his state inspected by a professional.
