Discovering noises from your car regularly is never comforting, so discovering noises on your Lexus GS suspensions when you pass a speed bump can be stressing. This indicator may be a sign of a minor issue as well as a warning of a much larger repair to come. In any case, it is important to check the source and take the necessary actions to eliminate the issue, it is with this intention in mind that we wanted to write this content to help 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 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 Lexus GS
Check Lexus GS suspension
If you notice a suspension noise when you pass a speed bump on your Lexus GS, 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 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 examine if this is the issue that worries you, take a dented road and focus on the noise coming from your front axle as you circulate over holes. If it is indeed the cups, think of changing them quickly or you may damage other parts and have to make more important repairs.
Check the cardan shaft
If you are here because you have searched for “Lexus GS 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 amasses inside them their working 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 make a turn at low speed. If it cracks in these two conditions you should consider changing it or them. If you have the feeling that this noise is more like a a loud noise on Lexus GS, don’t hesitate to read this document.
Check steering hinges/stabilizer bar
Finally, when you find out a suspension noise when your Lexus GS 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 adjust direction. If this is your situation, the parts that may have been broken by usual wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the causes of your noises, to examine it, put it under the vehicle and apply twists on each of its components to examine that there is no special play on one of them, they are meant to resist you quite strongly over their entire travel. Keep in mind to take your Lexus GS to your technician or swap them if they are involved.
squeaky noise speed bump Lexus GS
Check the stabilizer bar
If, however, you have a noise that is more like a squeak when you pass a speed bump with your Lexus GS, it is plausible that it is the stabilizer bar itself that is involved. Indeed, abnormal/pronounced wear of the latter can cause unusual friction which can generate this squeaking noise. Keep in mind to examine by going under your vehicle the condition of the paint on your bar which will tell us if there is friction. Second plausible point, 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 solve the issue.
Check engine silentblocks
Finally, last point that we can examine together, it is the engine silentblocks, in fact, these silentblocks function as pads/shock absorbers between the engine and the cradle of the car, 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 appears when you pass a speed bumps or any holes with your Lexus GS. To change them go to your technician.
Other speed bump noise Lexus GS
If, despite all its assumptions, you still can’t uncover the origin of the noise your Lexus GS makes when you pass a speed bump, we recommend you to refer to this article on a loud noise on Lexus GS or to visit your technician in order to carry an in-depth check on your Lexus GS and discover this issue.
