I put in a new coolant temp sensor about a week ago and within a few days started getting the typical sensor code. I figured the sensor must be a bad unit and bought a replacement under warranty. Boy was it a bad unit! It is broken off so that no easy access to remove it. Where the threads are broke off from where the socket head is. What is the best way to attack it? Should I drill and try to reverse it out? Should I try to put a dent in it and use a flat head to unscrew it?? Any thoughts would be appreciated!