I have fitted the fk coilover springs and adjusters on the rear this weekend on my coupe turbo(not adjusted all the way down for the spring to rattle).since then i have a constant rattle.removed the lower rubber base where the original spring sat and placed the adjuster on.could this be the problem.bought the kit second hand and unsure if a seperate rubber is supplied with the adjuster as the gm one does not fit in it.thanks