Installed a set of Pedder XA coil overs on my G8 and went to do the brakes yesterday. When I went to lift the car I heard a clunk. So I pulled the rear wheel and my spring was loose. So I pulled the strut and re tightened everything and redid my settings put it back on lowered the car and ****s still doing the same thing. I'm no rookie to cars but I've never seen this before. Any possible answers?