The cord to my block heater is not plugged into anything. I followed the cord, and the end that should be in the heater is dangling back there somewhere. I looked as best I could from above and squeezed my head underneath and looked, but couldn't see the heater in the side of the block. Is it below the exhaust manifold somewhere? Do I need to put the car on stands to get to it or can I reach it from above?

And just in case its unplugged for a reason does the radiator hose heater from diesel giant heat all of the coolant or just what's in the radiator? I guess I could look at my own car and find out...but its cold outside

Thanks,
-Geoff