Hey I tried changing the thermostat and there's nothing in the housings. So I've been going to Autozone and Pepboys to find the correct thermostat. I tried 3 different ones and none of them fit in correctly. Either it's not the right one or I have to force it in ? When I tried to put it in the housing it doesn't go all the way in. It get stuck and it can't close in. Any suggestion ? I need help !