Heater Core Backflushing
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
For information on Ford Color Coded Illustrations refer to OEM COLOR CODING .
Special Tool(s) / General Equipment
| Hose Clamp Remover/Installer |
|---|
| Locking Pliers |
Materials
| Name | Specification |
|---|---|
| Motorcraft® Premium Cooling System Flush VC-1 | ESR-M14P7-A |
Flushing
WARNING:
Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
- WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
Remove the pressure relief cap.
- Clamp and disconnect the heater hoses at the front heater core.
Use the General Equipment: Locking Pliers
Use the General Equipment: Hose Clamp Remover/Installer
-
NOTE: Refer to the cooling system flusher manufacturer's operating instructions for specific vehicle hook-up.
Use a cooling system flusher to backflush the heater core(s). Use Premium Cooling System Flush or equivalent.
Material
: Motorcraft® Premium Cooling System Flush / VC-1 (ESR-M14P7-A)
- Remove the clamps from the heater hoses.
- Fill and bleed the cooling system. Refer to filling and bleeding without a vacuum cooling system filler. Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding .