1996 Mercury Sable Owner's Manual - Page 308

u you have to add more than a quart (liter) at a time Engine coolant drain and flush Proper procedures for a complete coolant drain and flush of the cooling system can be found in the Car Service Manual. Following these recommended procedures will ensure that the specified coolant level and a 50/50 or appropriate mixture of coolant and water is maintained. Engine coolant refill procedure When the entire cooling system is drained and refilled, the following procedure should be used to ensure a complete fill: u With the engine OFF and cool, remove the pressure cap, located on the coolant reservoir. water to the coolant reservoir. Refer to Refill Capacities later in this chapter for the correct amount. is at the top of the cold fill range. u Add a 50/50 mixture of specified coolant and u Continue to fill the reservoir until the coolant u Reinstall the pressure cap until it clicks. u Start and idle the engine until the radiator upper hose is warm (this indicates the thermostat is open and coolant is flowing through the entire system). u Immediately shut off the engine and let cool. Cautiously remove the pressure cap and add a 50/50 mixture of specified coolant and water until the coolant is within the cold fill range in the coolant reservoir. heard and felt. u Reinstall the pressure cap until a click is 281