1993 Buick Roadmaster Owner's Manual - Page 225

e 4. Then fill the coolant recovery tankto "FULL COLD." 5. Put the cap back on the coolant recovery tank, but leave the radiator pressure cap off. 7. By this time the coolant ,level inside the radiator If filler neck may be lower.the levelis lower, add more of the propermix through the filler neck until of the level .reaches the basethe filler neck. 8. Then replace the pressure cap. Be sure the arrows on the pressure cap line up like this. 6. Start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine fan. 223