I am re-skinning the doors of my 1970 240Z, putting them back to blue. When I removed the door cards, I checked to see how much rust could be found inside the cavity of the doors (luckily: none, except some very light surface rust inside the very very front of the passenger door. Also at the very very front there, was a lot of stuff. Washers, bits of old clip cups, etc. But these 2 white mystery disks... Anybody know what these are? 

 

 

The closest thing I can think of are the nylon guides that is part of the window roller mechanism.  They do tend to wear and break over time and have no place to go other than the bottom of the door.

ah. Found this on eBay, the little disk assembly at the end of the arms?
https://www.ebay.com/itm/304831975810?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=304831975810&targetid=1645685073288&device=c&mktype=pla&googleloc=9019559&poi=&campaignid=20133407470&mkgroupid=147476396765&rlsatarget=pla-1645685073288&abcId=9312979&merchantid=115057574&gclid=CjwKCAjwsvujBhAXEiwA_UXnADVdoigwp8XSbf3Ye_QaOZEfjUlgIYsYiGCxLvB_5Ybs4QTuL1ZKUxoCulsQAvD_BwE

The 2 disks I found don't have those lips, but the clearer plastic piece could easily be that cup-like thing. 

I'm not sure I've ever opened the passenger door window, where I found these. I'll give that a try tomorrow. 

 

No I think they're washers for mounting the glass on the sash that those arms lift.

They're under these black metal washers.

Edited June 7, 20231 yr by jonbill

There is also a similar washer at the rear pivot point for the interior handle

I couldn't see the relevant parts of the arms with the door closed up, but the good news is that the window action is very smooth, fully retracted to full extended. I will probably let sleeping dogs lie in this case...