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General Procedures|Removal and Installation > < Cooling System Flushing

Fiesta 1996 (08.1995-02.2002)

Engine Cooling - Heater Core Backflushing Fiesta 1996 (08/1995-02/2002)
General Procedures

CAUTION:
CAUTION:The heater core must be backflushed separately from the engine cooling system for proper backflush water flow direction through the heater core. All engine cooling system flushing and backflushing procedures must include a separate backflushing of the heater or A/C system heater core after the flushing or backflushing of the engine cooling system to prevent the engine cooling system particles from clogging the heater core tubes and reducing (or eliminating) coolant flow through the heater core.
  1. Disconnect the outlet heater water hose from the engine and install a female garden hose and fitting adapter in the end of the heater outlet water hose. Secure with a hose clamp.
  1. Connect the female hose end of the heater outlet water hose to the male end of a water supply garden hose.
  1. Disconnect the heater inlet water hose from the engine and allow it to drain into a suitable container.
  1. Turn the water supply valve ON and OFF several times so that the surge action will help to dislodge larger, stubborn particles from the heater core tubes. Allow water pressure to flow for approximately five minutes.
  1. Remove the hose clamp and female garden hose end adapter from the heater outlet water hose and reconnect the heater outlet water hose onto the engine.
  1. Connect the heater inlet water hose onto the engine.
  1. Fill the cooling system as described, using a 50/50 mixture of Ford Premium Cooling System Fluid E2FZ - 19549 - AA or - B (in Canada Motorcraft CXC - 8 - B) or equivalent meeting Ford specification ESE - M97B44 - A and water.
  1. Test the system for proper heater performance with the specified engine cooling system conditions.

General Procedures|Removal and Installation > < Cooling System Flushing