Flushing-Heater Core

1. WARNING: Do not open the cooling system while it is hot or while the engine is running.

Partially drain the cooling system.

2. Note: 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 Premium Cooling System Flush F1AZ-19A503-A or equivalent meeting Ford specification ESR-M14P7A.
3. Fill the cooling system.