Oldsmobile cutlass supreme 1996 Owner's Manual page 206

8. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine fans.
filler neck may be lower. If the level is lower, add
.more of the proper mix through the filler neck until
the level reaches the base of the filler neck.
9. By this time the coolant level inside the radiator
10. Then replace the
pressure cap. At any
time during this
procedure if coolant
begins to flow out of
the filler neck, reinstall
the pressure cap. Be
sure the arrows on the
pressure cap line up
like this.
11. Check the coolant in the recovery tank. The level in
the coolant recovery tank should be at the HOT
mark when the engine is hot or at the COLD mark
when the engine is cold.
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