Experiencing noises from your automobile regularly is never reassuring, so hearing noises on your Infiniti QX70 suspensions when you go over a speed bump can be stressing. This indicator may be a sign of a small problem as well as a warning of a much larger repair to come. In any case, it is necessary to check the origin and take the necessary actions to eliminate the problem, it is with this objective in mind that we wanted to write this article 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 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 Infiniti QX70
Check Infiniti QX70 suspension
If you notice a suspension noise when you pass a speed bump on your Infiniti QX70, and it is categorized 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 Indeed, it may be the suspension cups, which, when they are out of date, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its role during small bumps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 examine if this is the problem that worries you, take a dented road and listen to the noise coming from your front axle as you drive 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 fixes.
Check the cardan shaft
If you are here because you have searched for “Infiniti QX70 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 degraded 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 make a turn at low speed. If it cracks in these two situations you should consider swapping it or them. If you have the feeling that this noise is more like a a loud noise on Infiniti QX70, don’t hesitate to read this content.
Check steering hinges/stabilizer bar
Finally, when you know a suspension noise when your Infiniti QX70 passes over a speed bumps, it is imaginable that the hinges or the stabilizer bar are responsible. Simply like the gimbals, the steering part is mobilized when you vary direction. If this is the case, 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 origins of your noises, to examine it, place it under the car and apply twists on each of its elements to examine that there is no particular play on one of them, they are meant to endure you quite strongly over their entire travel. Remember to take your vehicle to your mechanic or replace them if they are involved.
squeaky noise speed bump Infiniti QX70
Check the stabilizer bar
If, on the other hand, you have a noise that is more like a squeak when you go over a speed bump with your Infiniti QX70, it is possible that it is the stabilizer bar itself that is involved. Indeed, abnormal/pronounced wear of the latter can cause irregular friction which can generate this squeaking noise. Please remember to examine by going under your car the condition of the paint on your bar which will tell us if there is friction. Second possible point, it may be your stabilizer bar silentblocks that are dried out and cause noise, in which case take them off from the cradle and grease them, this should eliminate the problem.
Check engine silentblocks
Finally, last case that we can examine together, it is the engine silentblocks, actually, these silentblocks operate as pads/shock absorbers between the engine and the cradle of the automobile, a obvious weakness of these will create a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise comes up when you pass a speed bumps or any holes with your Infiniti QX70. To change them go to your auto mechanic.
Other speed bump noise Infiniti QX70
If, even though all its assumptions, you still can’t uncover the source of the noise your Infiniti QX70 makes when you pass a speed bump, we recommend you to read this content on a loud noise on Infiniti QX70 or to visit your mechanic in order to carry an in-depth check on your Infiniti QX70 and identify this problem.
