I own an early '67 with the cast iron lower door hinges. Years ago, I rebuilt the hinges with one of the commonly available kits (I don’t recall which one). The rebuild was a PITA but I got them rebuilt. Afterwards, I felt like the doors were difficult to close, however, they seem to be getting worse. I am getting concerned that the amount of force to close the doors is going to damage the door especially the driver’s side. Opening the door doesn’t require any excessive force.
The problem seems to be overcoming the two humps in the cam(?) that create the indents. When I compared the new cams to the original cams, I noticed the humps on the old cams were flat or nearly flat. I thought maybe someone ground the humps down to help the doors operate smoother, but, now I think they simply wore down on their own over time.
Looking at the other various components, they appear to be correct. The springs have the same number of coils, same diameter, and same length. The roller bushings seems to rotate freely on the pin. The problem seems to be amount of force needed to get the roller to “climb” the hump.
Anybody have experience with a similar problem or have any ideas of how to address this? Any advise would be greatly appreciated.