Ford 1996 Aerostar Manual page 265

If you must remove the coolant recovery cap,
follow these steps to avoid personal injury
casued by escaping steam or engine coolant:
1. Before you remove the cap, turn the engine
off and let it cool.
2. When the engine is cool, wrap a thick cloth
around the cap and turn it slowly,
counterclockwise to the first stop.
3. Step back while the pressure releases.
4. When you are sure that all the pressure has
been released, use the cloth to press the cap
down, turn it counterclockwise, and remove
it.
Use Ford Premium Engine Coolant
E2FZ-19549-AA (in Canada, Motorcraft CXC-8-B)
or an equivalent premium engine coolant that
meets Ford Specification ESE-M97B44-A. Ford
Premium Engine Coolant is an optimized
formula that will protect all metals and rubber
elastomers used in Ford cooling systems for 4
years or 50,000 miles (80,000 km).
Do not use alcohol or methanol antifreeze or any
engine coolants mixed with alcohol or methanol
antifreeze. Do not use supplemental coolant
additives in your vehicle. These additives may
harm your engine cooling system. The use of an
improper coolant may void the warranty of
your vehicle's engine cooling system.
Recycled engine coolant
Ford Motor Company recommends that Ford
and Lincoln-Mercury dealers use recycled engine
coolant produced by Ford-approved processes.
Not all coolant recycling processes produce
coolant which meets Ford specification
ESE-M97B44-A, and use of such coolant may
harm engine and cooling system components.
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