OPM 320 en-GB
37
©
Scania CV AB 2019, Sweden
Cooling system
Antifreeze and corrosion protection
dosing
35% by volume of Scania antifreeze provides
sufficient protection against corrosion. The low-
er the temperature, the higher the anti-freeze
content required. In the tables below, you can see
how much antifreeze is required in litres and US
gallons at different temperatures.
Example, litres:
• The total volume of the cooling system is 68
litres.
• The measured concentration of ethylene gly-
col is 35% by volume (freezing point -21°C).
According to the table, there are 25 litres of
ethylene glycol in the cooling system.
• The required concentration of ethylene glycol
is 45% by volume (freezing point -30°C). Ac-
cording to the table, 32 litres of ethylene gly-
col are required in the cooling system.
• Since there are already 25 litres in the cooling
system, fill another 7 litres of ethylene glycol
(32 - 25 = 7 litres).
Ethylene glycol con-
tent (%)
35
40
45
50
60
Ice slush forms (°C)
-21 -24 -30 -38 -50
Volume of ethylene
glycol (litres)
25
28
32
35
42
Example, US gallons:
• The total volume of the cooling system is 18
US gallons.
• The measured concentration of ethylene gly-
col is 35% by volume (freezing point -6°F).
According to the table, there are 6.6 US gal-
lons of ethylene glycol in the cooling system.
• The required concentration of ethylene glycol
is 45% by volume (freezing point -22°F). Ac-
cording to the table, 8.5 US gallons of ethyl-
ene glycol are required in the cooling system.
• Since the cooling system already contains
6.6 US gallons, fill with another
1.9 US gallons of ethylene glycol (8.5 -
6.6 = 1.9 US gallons).
Ethylene glycol con-
tent (%)
35
40
45
50
60
Ice slush forms (°F)
-6
-11 -22 -36 -58
Volume of ethylene
glycol (US gallons)
6.6 7.4 8.5 9.2 11.
1
