2001 Buick Regal Owner's Manual - Page 236

4. After the engine cools, open the coolant air bleed valve. If you see a stream of coolant coming from an air bleed valve, close the valve. Otherwise, close the valve after the radiator is filled. 6. Rinse or wipe any spilled coolant from the engine and the compartment. 7. Replace the 3800 Series II V6 engine cover shield. A. Remove the oil fill tube, with cap attached, from the valve cover. There is one bleed valve. It is located on the thermostat housing. 5. Fill the radiator with the proper DEX-COOLR coolant mixture, up to the base of the filler neck. See "Engine Coolant" in the Index for more information about the proper coolant mixture. B. Insert the catch tab on the cover shield under the bracket on the engine. C. Place the hole in the cover shield over the hole in the valve cover. Install oil fill tube and cap by twisting clockwise. D. If you have the supercharged engine, install the nut in the center of the cover shield. 5-18