The car is rattling and jiggling up front. My mechanic said I need a new strut...saw fluid around the shock (I watched him evaluate it). So I went to the NAPA store and there was a strut and strut assembly. Strut was 30 and strut assembly was 125 (or the other way around? Can't remember). The guy at the parts store said I need a coil compressor to compress the springs back in to the shock. Can someone explain this and any ideas on how to get the strut in there without a coil compressor?