Chevrolet Fleetmaster Series 1947 Owner's Manual page 30

the cylinder walls, spark plugs and exhaust valves. Because the
flow of water is not restricted at any point, the engine does not
develop any "hot spots." The thermostat, located in the water
outlet housing, maintains an efficient operating temperature in
all climates and should not be removed during the summer.
The water pump circulates the water in the cooling system .
It is a self-contained unit, of the self adjusting, centrifugal type,
with a capacity sufficient to take care of the cooling needs of
the engine.
Intelligent care and the proper servicing of the cooling system
are necessary to maintain its maximum efficiency.
The entire circulating system should be thoroughly flushed
out at regular intervals. This can be accomplished with any of
the several types of radiator flushers available. It will be found
that the systems employipg the reverse method of flushing will
prove most efficient.
When draining the cooling system, open the drain cock at the
bottom of the radiator and also the drain cock at the lower left
side of the cylinder block.
ANTI-FREEZING SOLUTIONS
In selecting an anti-freezing solution for winter operation, the
local conditions and the type of service should be considered. The
following information is given to assist the car owner in selecting
the anti-freezing solution best suited to meet his own individual
driving conditions.
The available commercial materials which may be used for
preparing anti-freezing solutions for automobile radiators are
denatured alcohof, methanol, propanol, ethylene glycol, and
distilled glycerine.
Kerosene or other oils, or solutions containing calcium chlo-
ride, magnesium chloride, sodium silicate or other inorganic
salts, honey, glucose or sugar are not satisfactory for use in the
cooling system .
Alcohol-Denatured
alcohol · and
methanol are used extensively for anti-freezing solutions. The va-
rious types of alcohol anti-freeze afford protection against freezing
and have the advantage of wide distribution and low first cost.
There are, however, two important disadvantages. Alcohol is
lost due to evaporation, especially on warm days and on hard
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