Subaru 2002 Legacy Owner's Manual page 396

B Changing the coolant
WARNING
Never attempt to remove the radiator cap until the engine has
been shut off and has cooled down completely. Since the coolant
is under pressure, you may suffer serious burns from a spray of
boiling hot coolant when the cap is removed.
Change the engine coolant using the following procedures according
to the maintenance schedule in the "Warranty and Maintenance Book-
let".
1. Remove the under cover.
2. Place a proper container under the drain plug and loosen the drain
plug.
3. Loosen the radiator cap to drain the coolant from the radiator. Then
drain the coolant from the reserve tank. Tighten the drain plug secure-
ly.
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