1993 Buick Riviera Owner's Manual - Page 205

1 4. Then fill the coolant recovery tank to "FULL COLD.'3 5. Put the cap back onthe coolant recoverytank, but leave the radiator pressure cap off. 6. Start the engine and letit run until you can feel the upper radiator hose getting hot. Watch out forthe engine fan. 7. By this the level time coolant inside the radiator filler neck may be lower. the level is lower, add If more of the proper mix through filler neck until the the level reachesthe base of the filler neck. 203