sucks when a simple job takes a turn for the worse.. removed thermostat housing, one of the bolts broke in the block. simple solution was (i thought) drill hole in bolt and use EZ-out. well the EZ out broke inside the bolt as well. got a carbide drill bit and have started drilling the bolt out entirely. planning to tap a new thread one size up. just thought i'd ask if there was a better course of action before i finished the job. any advice is appreciated. thanks guys.