Chevrolet Fleetmaster Series 1947 Owner's Manual page 31

driving, and; unless the solution in the radiator is tested periodi-
cally and sufficient alcohol added to replace the loss, the engine or
radiator, or both, are likely to be damaged by subsequent freez-
ing. The car finish is softened· and damaged by contact with
alcohol solutions or
vapor~.
Alcohol accidentally spilled on the
finish should be flushed off immediately with a large quantity of
cold water without wiping or rubbing.
The use of an overflow tank, connected to the overflow pipe of
the radiator, serves to condense and trap
~apor
or liquid that
would otherwise be lost. On cooling, the condensate or liquid is
returned to the radiator. The surge or overflow tank is particu-
larly useful when alcohol anti-freeze is used, and especially in
territories where the' atmospheric temperature fluctuates over a
wide range during the winter months.
GM Methanol Protection Table
Cooling SyJltem
Quarla of GM Methanol Required for Anti-Freeze
CQ&,=ity in
Protection at Temperatur .. shown below
aria
1
2
3 4 S 6 7
8
9
- - - -
- -
- -
- -
- -
- -
- -
IS
21
0 13° 5°
_5°
-17° -30 0 - 45°
- -
- -
- -
- - - -
- - - -
- -
16 2P 15° 7°
_2°
-12° - 24 0 -38° -52°
Cooling system capacity is 16 quarts if hot water heater is used.
Other alcohol and methanol anti-freezes should be used in accordance with
instructions issued by the anti-freeze manufacturer .
..
Ethylene Glycol-Ethylene
glycol is,
in first cost, more expensive than alcohol. Ethylene glycol anti-
freezing solutions have the distinct advantage of possessing a
somewhat higher boiling point than alcohol anti-freezing solu-
tions and, consequently, may be operated at a higher tempera-
ture, resulting in a more effective performance of the car heater.
Ethylene glycol has the further advantage that in a tight sys-
tem only water is required to replace evaporation losses. However,
any solution lost mechanically through leakage or foaming must
twenty-nine