The cooling system of your Ford Taurus is designed to operate as a sealed system, devoid of excess air. When air becomes trapped in the cooling system it can cause overheating issues. Instead of a typical coolant reservoir, the Taurus uses a pressurized expansion tank that is designed to remove excess air from the system when the engine reaches operating temperatures. These systems do not utilize a standard radiator cap, instead being pressurized by the expansion tank cap.
Step 1 - Raise the hood of your Taurus. Carefully inspect the radiator hoses for signs of leaking. These will show up as white or rust colored areas around the hose ends. Fix any leaks before you continue.
Step 2 - Be certain that the engine is cool, and remove the expansion tank cap.
Step 3 - Turn the heater on and place the switch in the maximum setting.
Step 4 - Start the engine. Leave the expansion tank cap off. Allow it to run until the upper radiator hose becomes hot. This indicates that the thermostat has opened.
Step 5 - Turn the engine off and allow it to cool. Add coolant, if necessary to bring the level up to the "Full Hot" line on the tank. Using your hands, squeeze the upper radiator hose. This pushes air out of the system.
Step 6 - Replace the expansion tank cap and start the engine. Allow it to reach operating temperature and check the coolant level again. Adjust as necessary.
TIPS: Drain, flush and refill the cooling system every 24 months or 30,000 miles, whichever is reached first.
WARNINGS: Run the engine in a well-ventilated area. Dispose of old antifreeze properly. It is hazardous to humans and animals. Never open the expansion tank cap when the engine is hot.
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