hello
this is what i ended up doing, i got some copper shims and some thermal paste and stuck them in the CPU (first remove the thermal pad), but that only worked for a month, i ended up having to reflow the CPU with some flux and a hot air gun
i detailed everything here
forum.xda-developers.com/tmobile-lg-v10/help/random-reboot-permanent-fix-performance-t3792064/post82247429#post82247429
but if you only need the phone to get the messages try the copper shim and thermal pad and see if that works out, they are cheap
hope this helps