I just had new coilovers installed which drive great but when I hit bumps, it makes the strangest noise. I cant find a word to describe it, but it sounds like any one of these:

-loose change
-jingling keys
-tambourine
-multiple washer bouncing around

I believe it happens in the rear on both sides. It last for just a second or two. Its high pitched and then it disappears until the next bump. The sound is the same every time. Any idea on what it might be?


Sidenote: Eariler this year (before the coilovers got installed) I had a brand new sway bar and end links installed with no issue.
Took a video and tugged on random parts but everything seemed secure: https://streamable.com/f2daxq

 

Nut on top of the shock isn't tight.

 

I tried to retorque them and they seem tight already. I was actually able to capture the sound on my dash. Any idea?

(sound captured from dash)
https://streamable.com/9ax9c2

(picture of front and rear suspension)

 

No, the one in the trunk. At the top of the rear shock. You probably need to pull the trunk liner to see it.

After listening to the video and seeing the rate you hit the speed bump I am thinking that is the noise of the oil in the shocks. That was a pretty aggressive hit.

 

I will give it another try for the rear.

I hear the jingling sound even on small bumps but the dash camera cant pick up the sound since its too faint for the camera.