The upper radiator hose burst yesterday in my brother's 94 S-10 blazer with the 4.3 CPI V6. I thought I might as well change out the lower hose as well as the thermostat because it has almost 170k miles on it and its probably been a while since it's been change. Turned out not to be such a good idea because when I tried to loosen the upper most thermostat housing bolt, the top broke off. I managed to get the lower bolt out without breaking it so the housing and thermostat could be taken out. Now I'm stuck with a bolt sticking out from the intake about a quarter inch and I've run out of ideas for getting it out. I tried some Vice-grips as well as a small pipe wrench. the vice grips didnt help at all. The pipe wrench will grab well but right when it starts to grab, I run out of room. I was thinking about bending the part of the bolt that's sticking out so I could get a wrench on it or something, is that a good idea or no? Thanks for the help.