Finding out noises from your auto frequently is never comforting, so discovering noises on your Volkswagen Polo 4 suspensions when you pass a speed bump can be stressful. This sign may be a sign of a small issue as well as a warning of a much larger repair to come. Whatever the case, it is fundamental to check the cause and take the necessary actions to solve the issue, it is with this aim in mind that we wanted to write this content to support you see more clearly. We will first see the possible causes for a crack when the speed bump passes, then, what can be the cause 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 Volkswagen Polo 4
Check Volkswagen Polo 4 suspension
If you notice a suspension noise when you pass a speed bump on your Volkswagen Polo 4, and it is characterized by a “clack” or cracking, it is highly plausible that your suspension block is the cause of it. Indeed, it may be the suspension cups, which, when they are out of date, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its role during small bumps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 verify if this is the issue that worries you, take a dented road and pay attention to the noise coming from your front axle as you go over holes. If it is indeed the cups, think of replacing them fairly quickly or you may affect other parts and have to make more important vehicle repairs.
Check the cardan shaft
If you are here because you have researched for “Volkswagen Polo 4 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 Indeed, when the cardan bellows get outdated and the dirt/dust accumulates inside them their action is degraded and it is possible to experience a sound when they are in torsion. To verify 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 make a turn at low speed. If it cracks in these two cases you should consider replacing it or them. If you have the feeling that this noise is more like a a loud noise on Volkswagen Polo 4, don’t hesitate to refer to this content.
Check steering hinges/stabilizer bar
Finally, when you know a suspension noise when your Volkswagen Polo 4 passes over a speed bumps, it is possible that the hinges or the stabilizer bar are responsible. Just like the gimbals, the steering part is mobilized when you adjust direction. If this is the situation, the components that may have been affected by regular wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the causes of your noises, to verify it, put it under the vehicle and apply twists on each of its elements to verify that there is no special play on one of them, they are meant to endure you quite strongly over their entire travel. Please remember to take your vehicle to your mechanic or change them if they are involved.
squeaky noise speed bump Volkswagen Polo 4
Check the stabilizer bar
If, on the other hand, you have a noise that is more like a squeak when you pass a speed bump with your Volkswagen Polo 4, it is plausible that it is the stabilizer bar itself that is concerned. Indeed, abnormal/pronounced wear of the latter can cause unusual friction which can cause this squeaking noise. Remember to verify by going under your vehicle the condition of the paint on your bar which will show if there is friction. Second plausible explanation, it may be your stabilizer bar silentblocks that are dry and cause noise, in which case disassemble them from the cradle and grease them, this should eliminate the issue.
Check engine silentblocks
Finally, last point that we can verify together, it is the engine silentblocks, in fact, these silentblocks act as pads/shock absorbers between the engine and the cradle of the auto, a noticable weakness of these will make a subsidence and therefore a space between the engine and the silentblocks, it may appear that a squeaking noise comes up when you pass a speed bumps or any holes with your Volkswagen Polo 4. To change them go to your auto mechanic.
Other speed bump noise Volkswagen Polo 4
If, even though all its assumptions, you still can’t locate the origin of the noise your Volkswagen Polo 4 makes when you pass a speed bump, we encourage you to consult this article on a loud noise on Volkswagen Polo 4 or to visit your mechanic in order to carry an in-depth check on your Volkswagen Polo 4 and discover this issue.
