Chevrolet Chevy II 1965 Owner's Manual page 33

system when used with the quality of water found in
some areas.
If the anti-freeze was installed at the factory or if
it meets the requirements of General Motors Standard
GM 1 899-M which contains adequate corrosion protec-
tion, it may be left in the cooling system for
24
months
or
24,000
miles whichever occurs first.
Check the coolant level regularly. Level should be
111 below top of filler neck when cold . Add water or
permanent anti-freeze as required to maintain proper
level. Concentration of coolant should be to O° F. or
below to insure sufficient corrosion protection.
Drain and flush cooling system every
24
months.
Fill with mixture of permanent type anti-freeze (GM
1899-M or equivalent) and water to provide proper
concentration of coolant.
Each fall have your Chevrolet dealer inspect the
cooling system to insure that all connections are leak-
proof and anti-freeze content will provide adequate
protection in cold weather.
31
The standard radiator cap is a 13 lb. pressure type.
Air conditioned vehicles are equipped with a
15
lb.
pressure type cap to provide added protection.
Pressure Type Radiator Cap
To remove the cap: Turn a quarter of a turn to
allow the pressure in the cooling system to escape
safely, then remove the cap. Always be sure that radiator
cap is installed tightly .
CAUTION: After
a
long, hard drive,
or after
driving
during hot weather, never attempt
to
remove the
radiator cap until the
engine
has
been
stopped
and allowed
to
cool
for
several minutes. Then,
carefully remove the cap as described above.