Chevrolet Light Operator's Manual page 40

Other alcohol and methanol
anti~freeze
should be used in
accordance with instructions issued by the
anti~freeze
manu·
facturer.
Ethylene Glycol. Ethylene glycol is, in first cost, more expen-
sive than alcohol. Ethylene glycol anti.freezing solutions have
the distinct advantage of possessing a somewhat higher boiling
point than alcohol anti-freezing solutions and, consequently,
may be operated at a higher temperature, resulting in a more
effective performance of the heater.
Ethylene glycol has the further advantage that in a tight
system only water is required to replace evaporation losses.
However, any solution lost mechanically through leakage or
foaming must be replaced by additional new solution. Under
ordinary conditions ethylene glycol solutions are not injurious
to the vehicle finish.
"GM Ethylene Glycol" is especially treated and compounded
for use in the cooling system. Other ethylene glycol prepara-
tions are available, but only those containing suitable corrosion
inhibitors and compounded for use in automotive cooling sys-
tems should be used.
GM ETHYLENE GLYCOL PROTECTION TABLE
QUI'!S ~f GM £tnylene Glycol R eq u i r~ ~ for Anti·Fr Ml ~
Protecti ~ •• t Te mperature. ,no .... below
3 4 5
&
7 8 9 10
~W80Qo
_ 12" _26"
~----
*16 17" 10° 2° -8" -19" - 34" -52"
17.5 H)o' ] 3
0
6
0
_2° _12° _24
0
_38
0
_ 5 2 0
'18.5 20" 15" 8" 1" _8" _18" -31" _ 46"
See Page 98 for cooling system capacity .
*A Hot Water Heater adds about one qua rt to Standard
System Capacity.
Other ethylene glycol anti-freezes should be diluted in
.accordance with the instructions issued by the anli-freeze manu-
facturer.
Glycerine. Radiator glycerine, which is chemically treated, in
accordance with the formula approved by the Glycerine Pro-
· 38·