It would appear that removing the cylinder plug and draining the fluid from there in addition to the plug on the water pump actually removes little if any additional fluid. I only did the water pump drain and it still took about a gallon to fill it all the way back up, including burping it a few times to make sure all the air was out of the system.
Radiator flush & oil change
in Maintenance Guides
Posted
It would appear that removing the cylinder plug and draining the fluid from there in addition to the plug on the water pump actually removes little if any additional fluid. I only did the water pump drain and it still took about a gallon to fill it all the way back up, including burping it a few times to make sure all the air was out of the system.