i would be careful with the arm and hammer idea. the motor is aluminum and therefore affected by caustic chemicals.
There is a special tool used to flush the cooling system completly, also with the car jacked as such, I bet there is another few gallons or so of coolent/oil in the front radiators and lines.
you really should listen to the advise from the experienced people in the group. even if you can fix it without pulling the motor, I bet you will spend 1000$ to do it correctly.
just the repeated flushing of the system will be expensive as the antifreeze is high dollar.
god forbid you have to pull the motor, easy 5-8 K fix. you will be overrun with "while you are in there fixes"
buy a 2.5 motor for 2-3-4K pull yours and trade it in for the core, and you have a instant fix for a huge problem.
Call LA dismantlers they will have all the parts you need.
http://www.ladismantler.com
you really are opening pandora's box. I dont think you understand/believe just how costly this can get real quick.