my lower control arm on the driver side is loose i discovered to day tire kind of moving back and forth I tried to tighten it would not tighten up so i took it out and the bolt was not broken so what i was thinking was that maybe the nut on the other side is no longer tac welded to front cross member so what should i do to corerect this i was thinking about welding the head of the bolt to the body so it cant move but if do that then if i ever have to change it it going to be a pain please help