Hi whenever I go over high speed bumps I'm hearing squishing noises from my Tein basics in the rear. The car drives perfectly quiet though and if I push down on the rear I do not hear the noise. There is no visible oils or any sign that the coilovers are blown. They are still fairly new- less than a year old and I try my best to go only on smooth surfaces.
Some have said that it is normal for the basics to make noise- but I dont remember them making noise in the past.

 

Why don't you call them (Tein USA) at 562-861-9161?