Ford 1996 Windstar Manual page 321

Never remove the radiator cap while the engine is running or
hot. If you must remove the radiator cap, follow these steps to
avoid personal injury that can be caused by escaping steam or
engine coolant.
Turn the engine off and let it cool before removing the
1.
radiator cap. You should exercise care when removing the
cap, even from a cooled engine.
When the engine is cool, wrap a thick cloth around the cap
2.
and turn it slowly counterclockwise to the first stop.
Step back while the pressure is released.
3.
When you are sure that all the pressure has been released,
4.
use the cloth to press, turn, and remove cap.
Stand away from the radiator opening while removing the
5.
cap. Hot steam may blow out or hot engine coolant may
splash out.
Freezing Protection
The factory-installed solution of Ford Premium Cooling System
Fluid and water will protect your vehicle to
Check the freeze protection rating of the engine coolant at least
once a year, just before winter.
Add engine coolant only to the engine coolant recovery
reservoir — not to the radiator. If the coolant level is low, add
to the engine coolant recovery reservoir a 50/50 mixture of
water and the type of engine coolant that Ford specifies. If the
coolant recovery reservoir is empty, you should also check the
radiator to see if it is low. Check the coolant level again the
next few times you drive your vehicle.
Ford Premium Cooling System Fluid is an optimized formula
that will protect all metals and rubber elastomers used in Ford
engines for four years or 50,000 miles (80,000 km). It is not
necessary and not recommended to use supplemental coolant
Servicing Your Windstar
35˚F ( 37˚C).
321