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Page Title:
Figure 1-2. Effect of Altitude on Boiling Point of Coolant |
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 TM 10-3930-644-14&P
ing proper coolant flow through the radiator. The engine
should never be operated without a thermostat installed
as serious damage can result.
Water freezes at 32 F., forms solid ice and expands
about 9% in volume--which causes tremendous pressure
and serious damage when allowed to freeze inside the
cooling system.
When operating temperatures are below 32F. an anti-
freeze liquid must be added which will lower the freezing
point a safe margin below the anticipated temperature of
outside air.
The only approved anti-freeze is Ethylene Glycol, or
permanent type, because of the temperature ranges it
maintains for efficient operation of the engine. When no
leaks are present, add water only to make up for
Figure 1-2. Effect of Altitude on Boil-
evaporation, as follows:
ing Point of Coolant
Temperature Range
Parts Glycol
to
Parts Water
CAUTION
32 to 10F
1
4
Do not run engine without thermostat
+10 to -100F
2
5
installed!
-10 to -300F
1
1
On Teledyne Continental engines, the
thermostat
performs an important function in achiev-
R-155-1
3-104
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