Finding out noises from your vehicle frequently is never reassuring, so hearing noises on your Alfa Romeo 147 suspensions when you go over a speed bump can be stressing. This sign may be a sign of a insignificant issue as well as a warning of a much larger repair to come. In any case, it is important to check the cause and take the necessary actions to correct the issue, it is with this objective in mind that we wanted to write this document to support you see more clearly. We will first see the possible explanations for a crack when the speed bump passes, after that, what can be the reason of a squeaking noise when a speed bump is being passed and finally what to do if you have another noise when a speed bump is passed.
Suspension cracking noise Alfa Romeo 147
Check Alfa Romeo 147 suspension
If you experience a suspension noise when you pass a speed bump on your Alfa Romeo 147, and it is characterized by a “clack” or cracking, it is highly possible that your suspension block is the cause of it. Indeed, it may be the suspension cups, which, when they are outdated, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its role during small bumps that compress the suspensions. To examine if this is the issue that worries you, take a dented road and listen to the noise coming from your front axle as you pass over holes. If it is indeed the cups, think of swapping them as soon as possible or you may ruin other parts and have to make more important vehicle repairs.
Check the cardan shaft
If you are here because you have researched for “Alfa Romeo 147 suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. Indeed, when the cardan bellows get old and the dirt/dust builds up inside them their action is deteriorated and it is possible to experience a noise when they are in torsion. To examine this, you can try both types of torsion, first vertical with suspension compressions on the speed bump passages, and horizontal when you are going to turn at low speed. If it cracks in these two cases you should consider changing it or them. If you have the feeling that this noise is more like a a loud noise on Alfa Romeo 147, don’t hesitate to read this document.
Check steering hinges/stabilizer bar
Finally, when you know a suspension noise when your Alfa Romeo 147 passes over a speed bumps, it is plausible that the hinges or the stabilizer bar are responsible. Exactly like the gimbals, the steering part is mobilized when you modify direction. If this is your situation, the components that may have been broken by regular wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the origins of your noises, to examine it, put it under the car and apply twists on each of its components to examine that there is no particular play on one of them, they are supposed to resist you quite strongly over their entire travel. Please remember to take your vehicle to your technician or change them if they are involved.
squeaky noise speed bump Alfa Romeo 147
Check the stabilizer bar
If, however, you have a noise that is more like a squeak when you go over a speed bump with your Alfa Romeo 147, it is possible that it is the stabilizer bar itself that is involved. Indeed, abnormal/pronounced wear of the latter can cause unusual friction which can provoke this squeaking noise. Bear in mind to examine by passing under your car the condition of the paint on your bar which will show if there is friction. Second possible point, it may be your stabilizer bar silentblocks that are dried out and provoke noise, in which case take them off from the cradle and grease them, this should resolve the issue.
Check engine silentblocks
Finally, last possibility that we can examine together, it is the engine silentblocks, actually, these silentblocks process as pads/shock absorbers between the engine and the cradle of the vehicle, a noticable fatigue of these will generate a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise shows up when you pass a speed bumps or any holes with your Alfa Romeo 147. To replace them go to your auto technician.
Other speed bump noise Alfa Romeo 147
If, despite all its assumptions, you still can’t locate the source of the noise your Alfa Romeo 147 makes when you pass a speed bump, we recommend you to consult this content on a loud noise on Alfa Romeo 147 or to visit your technician in order to carry an in-depth check on your Alfa Romeo 147 and identify this issue.
