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03-03-22
Engine Cooling
03-03-22
CLEANING AND INSPECTION (Continued)
10. On 3.8L engines, install cooling system vent plug.
lighten to 10-15 N·m (89- 132 1b-in).
INTAKE
MANIFOLD 9424
Cooling
System,
Cleaning
Cooling System Flush Procedure
Radiator Installed
AQ004G-A
To remove rust, sludge and other foreign material from
the cooling system, use Premium Cooling System
Flush F 1 AZ- 19A503-A or equivalent meeting Ford
specification ESR-M 14P7 -A that is safe for use with
aluminum radiators (8005). Remove the water
thermostat (8575) prior to pressure-flushing. This
cleaning restores cooling efficiency and helps prevent
overheating. A pulsating or reversed direction of
flushing water will loosen sediment more quickly than a
steady flow in the normal coolant flow direction. In
severe cases where cleaning solvents will not properly
clean the cooling system for efficient operation, use
the pressure flushing method using Rotunda Cooling
System Flusher 1 8 1 -QOOO 1 or equivalent. Dispose of
old coolant and flushing water contaminated with
antifreeze and cleaning chemicals in accordance with
local, state and federal laws.
Radiator Removed
1 .
CAUTION: Radiator internal pressure must
not exceed 1 38 kPa (20 psi). Damage may
result.
Back-flush radiator. With radiator upside down,
position a high-pressure water hose in bottom
hose location and back-flush.
2. Remove water hose connection (8592) and water
thermostat. Refer to Thermostat, Washer
Removal.
3. Back-flush engine. Position high-pressure hose
into engine through water thermostat location and
back-flush engine.
Heater Core Back-Flushing
CAUTION: The heater core must be back-flushed
separately from the engine cooling system for
proper back-flush water flow direction through
the heater core ( 184 76).
All engine cooling system flushing and back-flushing
procedures must include a separate back-flushing
of
the heater core after the flushing or back-flushing of
the engine cooling system. This will prevent engine
cooling system particles from clogging the heater core
tubes and reducing (or eliminating) coolant flow
through the heater core.
The correct heater core back-flushing procedure is as
follows:
1 . Disconnect the heater core outlet heater hose
and install a female garden hose-end fitting
adapter in the end of the outlet heater hose.
Secure with a hose clamp.
2.
Connect the female garden hose end of the outlet
heater hose to the male end of a water supply
garden hose.
3.
Disconnect the heater core inlet heater hose and
allow to drain into a suitable container.
4.
Turn the water supply valve on and off several
times so that the surge action will help to dislodge
large stubborn particles from the heater core
tubes. Allow full water pressure to flow for
approximately five minutes.
5.
Remove the hose clamp and female garden
hose-end adapter from the end of the outlet
heater hose. Reconnect the outlet heater hose.
6.
Connect the inlet heater hose.
7. Fill the cooling system as described, using a
50 I 50 mixture of Premium Cooling System Fluid
E2FZ- 19549-AA or -B (in Oregon,
F5FZ-1 9549-CC; in Canada, CXG-8-B), recycled
coolant or equivalent meeting Ford specification
ESE-M97B44-A and water.
8. Test the system for proper heater performance
with the specified engine cooling system
conditions.
Pressure Relief
Cap
1 . Inspect the areas under the vacuum valve and
rubber seal tor rust or dirt particles.
2.
Using warm tap water, raise the vacuum valve
and rubber seal and thoroughly flush away loose
rust or trapped dirt particles.
3.
Inspect and remove any loose or imbedded rust
or dirt particles on the sealing surfaces of the
rubber seal.
1997 Thunderbird, Cougar July 1 996