1993 Buick Regal Owner's Manual - Page 200
1993 Buick Regal Manual
Page 200 highlights
1 CAI YOU can De Durnea IT engine parts. Coola and it will burn if the engine parts are hot on enough. Don't spill coolant a hot engin . L . L ji After the engine cools, open the coolant air bleed valve or valves. r 3.8L V4 (VIN Code L27): There is one bleed valve. It is located on the thermostat housing. . E. , Ir 3.1L V6 (VIN Code T or M): There are twobleed valves. One is located on the thermostat housing. The other is located on the thermostat bypass tube.