Heater Core Backflushing
WARNING: This page is about a different car, the 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
- Partially drain the cooling system. For additional information, refer to COOLING SYSTEM DRAINING, FILLING AND BLEEDING .
- Use an appropriate cooling system flusher to backflush the heater core. Use Premium Cooling System Flush VC-1 or equivalent meeting Ford specification ESR- M14P7-A. Flush with water thoroughly after using VC-1 or equivalent prior to refilling the cooling system.
- Fill the cooling system. For additional information, refer to COOLING SYSTEM DRAINING, FILLING AND BLEEDING .
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.
NOTE:
For additional information, refer to the cooling system flusher manufacturer's operating instructions for particular vehicle hook-up.