I have been trying to figure out what's wrong with my 280z doors. Car is from 1978. Both have the same issue. The problem is that when door is closed. It can be pushed gently inwards quite a bit. So probably when driving it will make a big noise. When I shut down the door, it can be closed quite gently. No need to slam the door.
I'm just in the middle of the rebuild and all the weatherstrips in the door are new. This problem was in the car before I started the rebuild. First thought that the reason is gunk in the locking mechanism and I have been cleaning brake cleaner to get the old grease away from the lock. That did not help. Also the hinges has been fixed, so they don't "hang" anymore.
Does anybody have idea what could cause this problem? I can add tomorrow a video about this problem. Once I have figured out what's wrong with my video editor.