Aerostar Cooling System Service
Aerostar
8-01-7 COOLING SYSTEM SERVICE 8-01-7
DIAGNOSIS AND TESTING (Continued)
Aerostar
8-01-8 COOLING SYSTEM SERVICE
8-01-8
OPERATION
DRAINING, FILLING AND BLEEDING THE COOLING SYSTEM
DRAINING
1. Shut off engine and allow engine to cool.
2. Using a thick cloth, slowly rotate radiator cap to pressure relief position by backing off to first stop from fully installed position and allow cooling system to depressurize. Remove cap.
3. Attach a 3/8 inch I.D. hose on the radiator drain cock to minimize loss of coolant when draining.
4. Open radiator drain cock and permit radiator to drain.
5. Remove drain plug on cylinder block to allow engine to drain.
FILLING
NOTE: Use the following steps to remove air from the cooling system and to insure a complete fill.
1. Close radiator drain cock and install cylinder block drain plug.
2. Fill cooling system with a specified 50/50 mixture of coolant concentrate and water. Allow several minutes for trapped air to escape (bubble out) and for coolant mixture to flow through the radiator.
2.3L Engine - only
c. Disconnect heater hose at the water outlet connection on the thermostat housing.
d. Fill radiator until coolant is visible at the connection in the thermostat housing or the coolant level in the radiator reaches the radiator cap filler neck seat.
e. Install heater hose and tighten hose clamps to 1.36-2.03 N-m (12-18 lbs.in.)
NOTE: When filling a cross flow radiator, allow time for the coolant to flow through the radiator tubes to the other end tank to assure the radiator is full.
3. Install radiator cap to pressure relief position by installing cap to fully installed position and then backing off to first stop. This will allow any air to escape and will minimize spillage.
4. Slide heater temperature and mode selection levers to maximum heat position.
5. Start engine and allow to operate at fast idle (approximately 2000 RPM) for approximately three to four minutes.
6. With engine shut off, wrap radiator cap with a thick cloth, carefully remove cap and add coolant to bring coolant level up to filler neck seat.
WARNING: Use caution when adding coolant mixture to radiator to avoid hot coolant or steam blow out from the radiator.
7. Install cap to fully installed position. Then, back off to first stop and operate engine at fast idle until the upper radiator hose is warm (thermostat open). To check radiator, shut engine off, cautiously remove cap and add additional coolant if necessary. Install cap to fully installed position.
8. Remove the small plug from the top of the coolant recovery reservoir.
NOTE: Not the large cap for the windshield washer reservoir.
9. Add 1 liter (1.1 quarts) of 50/50 mixture of coolant concentrate and water to the coolant recovery reservoir. Reinstall the small plug.
CLEANING AND INSPECTION
CLEANING COOLING SYSTEM - 8005B
To remove rust, sludge and other foreign material from the cooling system, use D6AZ-19A503-A Cooling System Fast Flush or equivalent that is safe for use with aluminum radiators. Removal of such material restores cooling efficiency and avoids overheating. Always remove the thermostat prior to pressure flushing. A pulsating or reversed direction of flushing water flow will
loosen sediment more quickly than a steady flow in the normal direction of coolant flow. In severe cases where cleaning solvents will not properly clean the cooling system for efficient operation, it will be necessary to use the pressure flushing method. Various types of flushing equipment are available.
Revised 8/88