1997 Pontiac Bonneville Owner's Manual - Page 236
1997 Pontiac Bonneville Manual
Page 236 highlights
How to Add Coolant to the Radiator 2. Then keep turning the pressure cap, but now push down as you turn it. Remove the pressure cap. 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 turning the pressure cap.) If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left. 5-23
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 |
 |
How
to
Add
Coolant
to
the
Radiator
2.
Then keep turning
the
pressure cap, but
now
push
down as you turn it. Remove the pressure cap.
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 turning the
pressure cap.)
If
you
hear a hiss, wait
for
that to stop.
A
hiss means
there
is
still
some pressure left.
5-23