I :heart: SUBARU
Join Date: Aug 2006
Location: Buffalo, NY USA
Car: '00OBW, '96&'94 Legacy
Feedback Score: 0 reviews
The coolant comes out the bottom of the radiator and goes to the water pump suction. The arrow on the hose is just to help get it in the right orientation; the hose doesn't care which direction the coolant flows, but it won't fit quite right if it is in backwards.
Yes, the thermostat gasket goes onto the thermostat around that lip sort of like a bracelet.
The bolts holding on the thermo housing are small and long, and that means they're easy to break/shear as you found out. I almost always use new bolts whenever I remove them, and yes coat them liberally with antisieze, especially the end where it goes into the water pump. You can probably drill it out of the water pump. If I remember correctly, the other end of the water pump is open/accessible, so if you had to you could maybe drill it out a little larger, and just use a longer bolt with a nut on the end. Yes the water pump is aluminum. Do not use loctite on those bolts! They don't need it and it will almost guarantee they will snap off the next time.