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Home >> Ford >> 2022 >> Mustang Mach 1 Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Cooling - 2.3L ECOBOOST (231KW/314PS)/2.3L ECOBOOST (257KW/350PS) - Mi4) >> General Procedures >> Heater Core Backflushing

Heater Core Backflushing

WARNING: This page is about a different variant/trim than selected.

For information on Ford Color Coded Illustrations refer to OEM COLOR CODING

Materials 

Name Specification
Motorcraft® Premium Cooling System FlushVC-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.
  1. Partially drain the cooling system. Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding .
  2. Add Premium Cooling System Flush to backflush the heater core and follow the directions on the package. Flush with water thoroughly after using Premium Cooling System Flush prior to refilling the cooling system.

    Material: Motorcraft® Premium Cooling System Flush / VC-1 (ESR-M14P7-A)

  3. Fill and bleed the cooling system. Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding .