1994 Buick Roadmaster Owner's Manual - Page 208
1994 Buick Roadmaster Manual
Page 208 highlights
pressure cap. Be sure the pressure cap is tight. I 4. With the coolant surge tank pressure cap off, start the you engine and let it run until can feel the upper radiator hose getting hot. Watch out the engine for fans. By this time, the coolant level inside the coolant is surge tank may be lower. If the levellower, add more of the proper mix to the coolant surge tank "FULL COLD." until the level reaches 206