Flushing

CAUTION:
The heater core must be back-flushed separately from the engine cooling system for proper backflush water flow direction through the heater core.

RADIATOR INSTALLED

- To remove rust, sludge and other foreign material from the cooling system, use Premium Cooling System Flush F1AZ-19A503-A or equivalent meeting Ford specification ESR-M14P7-A that is safe for use with aluminum radiators.
- Remove the water thermostat prior to pressure flushing.
- This cleaning restores cooling 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 properly clean the cooling system for efficient operation, use the pressure flushing method, using Rotunda Cooling System Flusher 181-00001 or equivalent.
- Dispose of old coolant and flushing water contaminated with antifreeze and cleaning chemicals in accordance with local, state and federal laws.

RADIATOR REMOVED

CAUTION: Radiator internal pressure must not exceed 138 kPa (20 psi). Damage may result.

1. Backflush radiator with radiator upside down. Position a high-pressure water hose in lower hose location and backflush.
2. Remove water thermostat housing and water thermostat.
3. Backflush engine. Position high-pressure hose into engine through engine return and backflush engine.