Cooling System Care
Checking the coolant level at
each engine oil change. Level
should be
3"
below bottom of filler
neck when cold.
Coolant Recommendations
The inhibited year-around cool-
ant, used to
fill
the cooling system
at the factory,
is
a high quality
so-
lution that meets General Motors
Specifications 1899-M. This fac-
tory-fill coolant solution
is
formu-
lated to withstand two full calendar
years of normal operation without
draining, provided the same con-
centration of coolant
is
added if the
system needs additional fluid be-
tween drain periods. The original
factory-fill coolant provides freez-
ing protection to
-20°F
(-32°F
in
Canada).
Every two years, the cooling
sys-
tem should be serviced
as
follows:
1.
Drain
coolant,
when
hot,
through the radiator drain valve.
2. Close valve and add sufficient
plain· water to
fill
system.
3.
Run engine until normal operat-
ing temperature
is
reached.
4.
Drain and refill the system
as
described in steps 1, 2, and 3 a
sufficient number of times until
the drained liquid
is
colorless.
5. Allow system to drain com-
pletely and then close radiator
drain valve tightly.
6.
Add
the necessary amount of
high quality inhibited glycol
base coolant meeting GM
Speci-
fication 1899-M to provide the
required freezing and corrosion
protection
(at
least to O°F.)
7. Run engine until normal oper-
ating temperature
is
reached.
8.
Check and adjust level of cool-
ant after system has cooled
suffi-
ciently to remove radiator cap.
60
NOTE: Addition of supplemental
additives and other available ma-
terials which have not been specifi-
cally approved by GM are not nor-
mally required in your car. Use of
these materials will result in un-
warranted operating expense.
It
is
the owner's responsibility to
keep the freeze protection at a level
commensurate with the tempera-
tures which may occur in the area
in which the vehicle will be oper-
ated. Regardless of whether freez-
ing temperatures are
or
are not ex-
pected, cooling system protection
should be maintained at least to
OaF
to provide adequate corrosion
protection. When coolant addi-
tions are required because of cool-
ant loss or to provide additional
protection against freezing at tem-
peratures lower than
-20°F,
(-32°F
in
Canada),
a sufficient
amount of an ethylene glycol base
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