I have a 2009 Ford Explorer XLT 4.6 Liter, It over heated, I went to change the thermostat, I took everything apart and put the new thermostat in and o ring in put the cover on and installed the second bolt in the aluminum thermostat housing and snapped the bolt off, I tried drilling it out and didn't get it straight, and can not get it out. There is a black air nipple that attaches to the plenum right above the right bolt. Any suggestions or does anyone know where to purchase the aluminum lower thermostat housing, If so my email is [email protected]