Hi. I have a 89 Buick LeSabre and its need a front passenger side lower ball joint. Can i change that myself, or is it a machine press-fitted balljoint? I brought the car in for a safety with 220 000 on it, mostly orig. parts and all it needs is 1 tie rod end, a ball joint, and the windshield is sand blasted. There is no rust on the frame either. Any help thanx

They aren't press fit, I believe that they're rivoted into the lower control arm. The rivots are hardened steel, and you're gonna have fun trying to do them. You'll need a good drill and a drill bit to drill out the centers of the rivots and then a good chisel or air chisel to try and get the rivots pushed into the holes.

Hope that makes sense, and right. This was what I had to do on a 92-95 Bonne.

Not that I would recommend this method, but I have removed ball joint rivets with a cold chisel, a punch, and a hammer. Power tools are you friends on this job.
As I recall, the replacement ball joints included bolts.

I take the lower control arm off the car to change them out. You've gotta change out the sway bar end links when you do, but it makes it much easier to do the drilling and cutting and grinding, and pounding. I drill out the center of the rivet, grind off one end of the rivet, then drive it through with a big punch. I like my Bonneville, but I have to say Toyota has a better idea. Their ball joints bolt in and center into the proper position with two centering nuts and a bolt. A lot easier. But, then, after you get rid of the original riveted ones, your Bonneville'* ball joint will be bolt-in too.

That'* what I was trying to say....night shift has my thoughts more all over the place than normal.