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before you swap its best to check why its over heating ?
if you put another motor into e1 does that over heat?
if so then check stepper driver volts , 8.30 is about norm setting ,10.00 is about the max setting any higher , thing get very hot
https://youtu.be/kkjwOxDSCiQ heres a vid on how to do that .
ps if u have a look at his other vids , they will help alot,
good luck