Just what the heck was the designer of "Genuine Intel" Socket 370 heatsink thinking? Using a PLASTIC spring clip that is very fragile even brand new, and more so after 22 years.
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It snapped when I tried to unclip the heatsink in order to replace the failed fan. I don't have any spare S370 heatsink and nice ones are expensive and far, far away; incidentally, I realized that earlier Socket 7 heatsinks were compatible with Socket 370 so I gave it a try. Unfortunately though, even with a new fan the CPU temperature jumped to 69°C even idling in BIOS so it wouldn't be practical to use it under any operating system.
I wonder if downgrading the CPU from P3 1000EB (TDP: 29W) to 600EB (TDP: 15.8W; much closer to Socket 7 Pentium-MMX). I've also fixed the broken spring clip with Scotch Super Glue Gel but I'm not sure if the mechanical strength of the glued joint is strong enough. 🙄