Flushing-Heater Core

1. WARNING: Do not open the cooling system while it is hot or while the engine is running. Failure to follow these instructions may result in personal injury.

Partially drain the cooling system.

2. Note: For additional information, refer to the cooling system Flush-All Operating Instructions for particular vehicle hook-up.

Use cooling system Flush-All, Flush Kit Hardware Package and Drain Kit to back flush the heater core. Use Ford Premium Cooling System Flush F1AZ-19A503-A or equivalent meeting Ford specification ESR-M14P7-A.
3. Fill the cooling system.