Experiencing noises from your auto regularly is never reassuring, so hearing noises on your Peugeot 407 suspensions when you go over a speed bump can be worrying. This indicator may be a sign of a small trouble as well as a warning of a much larger repair to come. In any case, it is important to check the origin and take the necessary actions to correct the trouble, it is with this goal in mind that we wanted to write this content to help you see more clearly. We will first see the possible reasons 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 Peugeot 407
Check Peugeot 407 suspension
If you experience a suspension noise when you pass a speed bump on your Peugeot 407, 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 old, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its job during small bumps that compress the suspensions. To verify if this is the trouble 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 as soon as possible or you may ruin other parts and have to make more important maintenance.
Check the cardan shaft
If you are here because you have researched for “Peugeot 407 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 Indeed, when the cardan bellows get out of date and the dirt/dust accumulates inside them their functions is degraded and it is possible to experience a sound when they are in torsion.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 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 Peugeot 407, don’t hesitate to check out this content.
Check steering hinges/stabilizer bar
Finally, when you know a suspension noise when your Peugeot 407 passes over a speed bumps, it is imaginable that the hinges or the stabilizer bar are responsible. Exactly like the gimbals, the steering part is mobilized when you vary direction. If this is the situation, the parts that may have been affected by normal wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the origins of your noises, to verify it, place it under the automobile and apply twists on each of its elements to verify that there is no particular play on one of them, they are expected to endure you quite strongly over their entire travel. Remember to take your vehicle to your auto technician or change them if they are involved.
squeaky noise speed bump Peugeot 407
Check the stabilizer bar
If, alternatively, you have a noise that is more like a squeak when you go over a speed bump with your Peugeot 407, it is possible that it is the stabilizer bar itself that is involved. Indeed, abnormal/pronounced wear of the latter can cause uncommon friction which can provoke this squeaking noise. Bear in mind to verify by going under your automobile 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 bring on noise, in which case take them off from the cradle and grease them, this should fix the trouble.
Check engine silentblocks
Finally, last case that we can verify together, it is the engine silentblocks, in fact, these silentblocks operate as pads/shock absorbers between the engine and the cradle of the auto, a pronounced fatigue of these will generate a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise happens when you pass a speed bumps or any holes with your Peugeot 407. To swap them go to your auto mechanic.
Other speed bump noise Peugeot 407
If, despite all its assumptions, you still can’t locate the origin of the noise your Peugeot 407 makes when you pass a speed bump, we encourage you to consult this content on a loud noise on Peugeot 407 or to visit your auto technician in order to carry an in-depth check on your Peugeot 407 and discover this trouble.
