hello I've a G20 81 and the temperature sensor moves like crazy. I tool a look but I'm not sure where the cable goes into the engine to check if the cable is wrong or something.
Can somebody provide some direction as I believe it should be there but I do not see any cable connected into it or any cable around.

 

is that sealant on the threads? hard to tell from blurry pic. it shouldn't be there

 

exactly...One wire sensors ground through the threads.