Why is my coolant sensor popping out??
I was driving down the highway the other day and I had to gun my engine to pass someone up and I immediately smelled coolant and saw a path of liquid following me down the highway. When I pulled over and popped the hood I saw that the coolant sensor had popped out of the top of the thermostat housing and all of the coolant had sprayed through its hole. I filled radiator back with water and put sensor back in and it drove fine home. I tested again this morning by gunning engine and the sensor plug popped back out. I don't notice any type of clip to hold it in on any pictures ive seen online so my question is why is it popping out?? Is/Was there air in the system? Is the fitting for the plug in the thermo housing just worn out? I don't want to buy a new housing or plug if I don't need to.
I've attached some pics
Thanks for your help!