Buick 1998 Century Owner's Manual page 242

1
How to Add Coolant to the Radiator
NOTICE:
Your engine has a specific radiator fill procedure.
Failure to follow
this
procedure could cause your
engine to overheat and be severely damaged.
I
1. You can remove the
radiator pressure cap
when
the
cooling
system, including the
radiator pressure cap and
upper radiator hose, is
no longer hot. Turn the
pressure cap slowly
counterclockwise until it
first stops. (Don't press
down while huning the
pressure cap.)
2. Then keep turning the
pressure cap, but now
push down as you
turn it. Remove the
pressure cap.
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Don't spill coolant on a hot engine.
If you hear a hiss, wait for that to stop. A hiss means
~
there is still some pressure left.