I had done exactly like that with string before back in the day when I had PC built newly and didn't think of getting the heatsink. 🤣, didn't work too well with what I had found in my electronics junk stash that I bought along with me when I was attending College. The Am486DX-40 crashed easily, and really needs heatsink.
When I did get proper heatsink with the horrid little fan which was just a typical cheap stuff, later on bought the Dynamite VLB card and overclocked that cpu to 50MHz and it was like this way for rest of it's life.
Thank you for showing photos. I wanted to see the hooks design first. I can make one once I know what to do.
I had enough with plastic clips, these usually break, some is so sloppy that does not exert any force at all. The one that were best was four little G clips that comes with heatsink was better quality that you press them one by one onto CPU while heatsink is held to it, haven't seen any since. These G clips is cross section design as you hook it onto heatsink, then press inwards this which wedge them onto cpu which did exert good force due to G shape acting as very stiff spring.
Aha, found this while googling something else. That's the G clips design!
https://www.worthpoint.com/worthopedia/ast-48 … rd-n-1807830633
Cheers,
Great Northern aka Canada.