[Jim Norris]

After reading this thread I went out to check my own setup. On mine, the small hose from the expansion tank (shiny tank) runs directly to the bottom of the overflow tank (the petcock is in the open position) and another small hose is attached to the upper overflow tank fitting and run down the side of the tank. This hose is open to the ground.
Does this setup possibly act as a recovery system allowing accumulated coolant resting at bottom of the tank to be drawn back up the hose and into the expansion tank, assuming I have a recovery type cap?