1997 Mercury Grand Marquis Owner Guide 1st Printing - Page 220

Never increase the engine coolant concentration above 60%. Leave a 50/50 mixture of engine coolant and water in your vehicle year-round in non-extreme climates. 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: NOTE: It is imperative the following procedure be adhered to. Failure to do so could result in damage to your engine. u With the engine OFF and cool, remove the pressure cap, located on the coolant reservoir. Remove the heater hose and clamp, located on the rear of the intake manifold. water to the coolant reservoir. Refer to Refill Capacities later in this chapter for the correct amount. Add coolant to the reservoir until the coolant continuously flows out of the tube in the rear of engine. Reattach hose and secure clamp. is at the FULL COLD level. installed position. u Add a 50/50 mixture of specified coolant and u Continue to fill the reservoir until the coolant u Reinstall the pressure cap to the fully 221