about 7,000 miles ago i had to replace my thermostat. now really a car with 44,000 miles on it needs a new thermostat? anyone had this problem? i posted a thread awhile back (not many replies) to help with this problem. the thermostat seal which is made of rubber broke off & twisted up between the valve that opens and closes. it kept the t-stat open and had basically failed. defective part or something wrong with the car? you guys tell me.