Back Flushing-Heater Core

1. Partially drain the cooling system.

WARNING: DO NOT OPEN THE COOLING SYSTEM WHILE IT IS HOT OR WHILE THE ENGINE IS RUNNING.

2. 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.

NOTE: Refer to the cooling system Flush-All Operating Instructions for particular vehicle hook-up.

3. Fill the cooling system.