FORD 2002 Focus v.2 - Manual (Page 279)

Maintenance and Specifications
279
To avoid personal injury,
make sure the engine is cool
before unscrewing the coolant
pressure relief cap. The cooling
system is under pressure; steam
and hot liquid can come out
forcefully when the cap is
loosened slightly.
1. Before you begin, turn the
engine off and let it cool.
2. When the engine is cool, wrap a
thick cloth around the coolant
pressure relief cap on the coolant
reservoir (an opaque plastic bottle).
Slowly turn cap counterclockwise
(left) until pressure begins to
release.
3. Step back while the pressure
releases.
4. When you are sure that all the
pressure has been released, use the
cloth to turn it counterclockwise
and remove the cap.