Draining Cooling System
WARNING: This page is about a different car, the 2001 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.
Remove the cap from the expansion tank. Open the radiator drain cock. Install one hose on the nipple to lead off the coolant. Close the cock when the coolant is drained. When draining the coolant from the engine, slacken off the plug at the rear of the engine. Close the plug after draining.