Listening noises from your automobile often is never comforting, so hearing noises on your Toyota Sienna suspensions when you pass a speed bump can be disturbing. This indicator may be a sign of a insignificant trouble as well as a warning of a much larger repair to come. In any case, it is fundamental to check the cause and take the necessary actions to eliminate the trouble, it is with this intention in mind that we wanted to write this document 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 Toyota Sienna
Check Toyota Sienna suspension
If you encounter a suspension noise when you pass a speed bump on your Toyota Sienna, and it is categorized by a “clack” or cracking, it is highly possible that your suspension block is the origin of it. In fact, it may be the suspension cups, which, when they are outdated, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its role during small bumps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 verify if this is the trouble that concerns you, take a dented road and focus on 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 damage other parts and have to make more important auto repairs.
Check the cardan shaft
If you are here because you have searched for “Toyota Sienna suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. In fact, when the cardan bellows get old and the dirt/dust accumulates inside them their action is deteriorated and it is possible to experience a noise 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 Toyota Sienna, don’t hesitate to check out this document.
Check steering hinges/stabilizer bar
Finally, when you recognise a suspension noise when your Toyota Sienna 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 case, the components that may have been destroyed by normal 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, position it under the car and apply twists on each of its components to verify that there is no special play on one of them, they are supposed to resist you quite strongly over their entire travel. Remember to take your Toyota Sienna to your auto technician or swap them if they are involved.
squeaky noise speed bump Toyota Sienna
Check the stabilizer bar
If, however, you have a noise that is more like a squeak when you pass a speed bump with your Toyota Sienna, it is possible that it is the stabilizer bar itself that is concerned. In fact, abnormal/pronounced wear of the latter can cause unusual friction which can create this squeaking noise. Remember to verify by passing under your car the condition of the paint on your bar which will tell us if there is friction. Second possible explanation, it may be your stabilizer bar silentblocks that are dry and create noise, in which case remove them from the cradle and grease them, this should eliminate the trouble.
Check engine silentblocks
Finally, last possibility that we can verify together, it is the engine silentblocks, in fact, these silentblocks function as pads/shock absorbers between the engine and the cradle of the automobile, a pronounced weakness of these will make 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 Toyota Sienna. To replace them go to your auto technician.
Other speed bump noise Toyota Sienna
If, despite all its assumptions, you still can’t locate the source of the noise your Toyota Sienna makes when you pass a speed bump, we suggest you to read this article on a loud noise on Toyota Sienna or to visit your auto technician in order to carry an in-depth check on your Toyota Sienna and find this trouble.
