1996 Buick Park Avenue Owner's Manual

6. Start the engine and let it run until you can feel theupper radiator hose getting hot. Watch out for theengine fans.7. By this time the coolant level inside the radiatorfiller neck may be lower. If the level is lower, addmore of the proper mix through the filler neck untilthe level reaches the base of the filler neck.8. Then replace the pressure cap. At any time duringthis procedure if coolant begins to flow out of thefiller neck, reinstall the pressure cap. Be sure thearrows on the pressure cap line up like this.