1997 Chevrolet Malibu Owner's Manual - Page 205
1997 Chevrolet Malibu Manual
Page 205 highlights
L1 1. You can remove the coolant surge tank pressure cap 2. Then keep turning the pressure cap slowly, and remove it. when the cooling system, including the coolant surge tank pressurecap and upper radiator hose, no is longer hot. Turn the pressure cap slowly about one-quarter of a turn to theleft and then stop. If you heara hiss, waitfor that to stop. A hiss means there is still some pressure left. 5-18
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1
L
1.
You
can
remove the coolant
surge
tank
pressure
cap
when
the
cooling
system,
including
the
coolant
surge
tank
pressure cap and
upper
radiator
hose,
is
no
longer
hot.
Turn
the
pressure
cap
slowly
about
one-quarter
of
a turn
to
the
left and
then
stop.
If
you
hear a hiss,
wait for that
to
stop.
A
hiss
means
there is still
some
pressure
left.
2.
Then
keep
turning
the
pressure
cap
slowly,
and
remove
it.
5-18