propane hot enough for broken bolt removal?

long story short, a small (1/4" 5/16" diameter?) thermostat housing
bolt broke. about 3/8" of it is sticking out of the aluminum engine
block, with the cap missing. i want to heat it up, but only have access
to a cheap propane torch. will this do any good? i was thinking that
heating, then one of the craftsman socket-like removal tools.

thoughts? there isnt any chance of damaging/warping anything with a
measly propane torch, right?

thanks,
anthony