There are two common types of "senders". One is a switch, NOT a sender. The normal thermal switch will check wide open when cold, and closes to a short when the engine reaches a certain temperature.
The other type is a thermistor. It acts like a variable resistance, normally going low resistance when hot. It should NOT be used to drive a relay. It is designed to drive low current electronics like a gauge or computer.
NONE of these switches or sensors are hurt or weakened by normal torque levels as long as you do not push down on the terminal with the socket or wrench while torquing, or have it bottom out on the sensor or switch tip. They are not any more sensitive to torque than anything else you might thread in.
They will fail prematurely if you use them wrong, like using a thermistor to control a relay coil.
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89 LX. 363, single turbo, Super Vic EFI, TFS high port heads by TEA, solid roller, glide. Holley HP EFI. (exact combo varies)