26
·
COOLING
SYSTEM
The
coolant
should
be
kept
at
a level
even
with
the
center
line
of
the
inlet
hose. Care must be exercised when re-
moving the pressure radiator cap after
the engine is warm. Loosen cap slowly
to
the first notch, wait for pressure
to
escape
and
then remove
cap
.
DRAINING
AND
CLEANING
The
cooling system
should
be drained
and
cleaned twice a year
or
just
be-
fore anti-freeze
is
added
and
after anti-freeze
is
removed.
For
maximum pro-
tection
of
the
cooling
system, especially
during
hot
weather
, Oldsmobile
Radiator
Rust Inhibitor should be added to the fresh coolant.
DRAINING
THE
COOLING
SYSTEM
The
radiator core
can
be drained by means
of
a drain valve
at
the radiator
lower
tank
which
is
accessible when the
hood
is
raised.
The
engine block
must be drained by means
of
two drain valves, one
on
each side
of
the engine
block underneath the exhaust manifolds. Both drain valves must be opened
to completely drain the engine
of
coolant. Loosen the pressure radiator cap
when draining.
ANTI-FREEZE
The kind
of
anti-freeze you use
is
a matter
of
individual preference. "Perma-
nent"
anti-freeze solutions do
not
evaporate
and
will protect the cooling sys-
tem
of
your
car
against freezing
and
clogging
from
rust
formation
for the
winter season. Alcohol type anti-freeze
is
subject to evaporation
and
must
be checked frequently.
It
may be necessary to
add
more alcohol anti-freeze
occasionally in
order
to maintain the protection desired. Anti-freeze should
be drained as soon as danger
of
freezing
is
over.
INSTALLATION OF
ANTI-FREEZE
Before installing anti-freeze, it
is
important to have the cylinder head gasket
and
all water connections tightened and inspected for leaks.
COOLING
SYSTEM CAPACITY
The
cooling system capacity
of
your
Rocket
engine
is
20V2
quarts
without
heater
and
including heater,
21
~
quarts. Amounts
of
anti-freeze required to
protect the cooling system
at
various temperatures
is
outlined in the Techni-
cal
Data
section.
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