Engine Cooling: Maintenance Mercury Milan I

Cooling System Draining, Filling and Bleeding

Special Tools Illustration Tool Name Tool Number RADKITPLUS 078-00497

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Material

Draining

Note. Stop-leak style pellets/products must not be used as an additive in this engine cooling system. The addition of stop-leak style pellets/products can clog or damage the cooling system, resulting in degraded cooling system performance and/or failure.

Note. Less than 80% of coolant capacity can be recovered with the engine in the vehicle. Dirty, rusty or contaminated coolant requires replacement.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(ref-271051) .
2. Release the pressure in the cooling system by slowly turning the pressure relief cap one half turn counterclockwise. When the pressure is released, remove the pressure relief cap.
3. Place a suitable container below the radiator draincock. Open the draincock and allow to drain. Close the draincock after draining.

Cooling System Flushing

Material

1. To remove rust, sludge and other foreign material from the cooling system, use cooling system flush that is safe for use with aluminum radiators, For additional information, refer to Specifications. This cleaning restores cooling system efficiency and helps prevent overheating. A pulsating or reversed direction of flushing water will loosen sediment more quickly than a steady flow in the normal coolant flow direction. In severe cases where cleaning solvents will not clean the cooling system efficiently, it will be necessary to use the pressure flushing method using cooling system flusher. Dispose of old coolant and flushing water contaminated with antifreeze and cleaning chemicals in accordance with local, state or federal laws.
2. Remove the radiator. For additional information, refer to «Radiator»(ref-271067-S04710815002007110800000) .
3. Backflush the radiator with the radiator in an upside-down position with a high-pressure hose in the lower hose location and backflush.
4. Remove the thermostat. For additional information, refer to «Thermostat Housing - 2.3L»(ref-271067-S32941985542007110800000) , «Thermostat - 3.0L»(ref-271067-S10874823512007110800000) or «Thermostat - 3.5L»(ref-271067-S06622157582007110800000) .
5. Backflush the engine. Position the high-pressure water hose into the engine through the engine return and backflush the engine.

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