TIEROD PROBLEMS MY MECHANIC SAYS ,from the occasional knocking noise when turning Left and RIght of my 2004 PT cruiser , I have a loose Right outer tierod, he says probably needs both. you can replicate the noise even sitting still, turning left then right ...repeat if you want. Can i put them in myself, then get front wheel alignment.?

It's not recommended that you replace them yourself if you haven't at least watched someone else replace one before. Often they require use of a torch just to loosen them up, and it's nearly impossible to get the new tie rod ends where the old ones were just by eyeballing it. Even just driving it from your house to the mechanic afterwards could cause significant enough tire wear to throw off an alignment.