kei office coilovers question

[180driftersx]

I have the s13 coilovers on the s13 I have some weird clunking noise that is coming from one of the rear coils. I dont think the shock is blown there is nothing coming out of it and it seems to be coming off the pillow ball mount. I have put them in and taken them apart several times so dont tell me to tighten them down been there done that. I dont have the adjustment for the rear coilovers and I was wondering if it is set at 1 or 4 that this may be causing this noise. It only makes this noise on one of them I looked at the shock and didnt notice a bend in the rod. Also I switched the coilover to the other side and the noise switched sides so I know that this is where the noise is coming from. Any info would be great thanks jake