When you go over bumps on the road, you may sometimes hear a squeaking noise coming from either side of your car, or from underneath it. This noise is not only embarrassing, as everyone around you turns his head to see your car, but can be a sign that there is something wrong in your car too. Read this OneHowTo article if you want to know the reason why this problem happens and find out why your car squeaks when you go over bumps.
Ball joints or rubber bushings
A squeaky sound may be caused by the connecting ball joint or rubber bushing being worn out. Ball joints are connections in which a metal ball is trapped inside in a cup lubricated with grease. Most ball joints are not lubricated externally, so, if the grease gets old or leaks out, the joints start squeaking. Most rubber bushings are not lubricated and have to work dry only. Over time, the rubber shrinks, cracks or dries, and starts squeaking whenever the suspension moves.
How to identify the problem
It is very difficult to identify which bushing or ball joint is causing the noise. Most of the times, when the vehicle is still, the suspension does not move the way it does when it is running. So, you may not identify the part that is causing the problem.
To try to identify it, park your car on a level surface, and block all the 4 wheels to make sure that the car does not roll. Ask a friend to bounce every corner of the vehicle. Make sure that the car’s body panel does not get damaged or dented during the process, but the car should rock so that you can hear the squeaking noise. You may need to bump, push, pull and bounce to actually create the squeak that you hear while driving. By doing this, you will at least be able to narrow down the area from where the noise is coming.
Dealing with it
Once you have narrowed down the location, you can start checking the exact component that is causing the noise. Spray penetrating oil on the suspected ball joints or bushings. Prefer the ones that have rips or tears, or that look old.
If the noise goes away after squirting them with oil, you have found the problem and you should replace it along with any other ripped or torn ball joint or bushing. Sometimes you cannot purchase only the bushing and you will have to replace the entire suspension piece, such as the lower control arm or the shock absorber.
If the sound persists, bring the car to the mechanics
Once you have done this, you will no longer hear any squeaking sound while going over the bumps, provided that you have replace the right component that was causing the noise. If, regardless of what you've done you still hear the sound, it is better to bring your car to a professional mechanic for a complete service.
If you want to read similar articles to Why is my Car Squeaking when I Go over Bumps, we recommend you visit our Car Maintenance and Repair category.