Cooling System - Scania PDE Operator's Manual

Cooling system

Coolant
WARNING!
Ethylene glycol can be fatal if ingested and can
cause skin irritation and eye damage.
The coolant recommended by Scania is a mix-
ture of water with antifreeze and corrosion inhib-
itor (ethylene glycol). The coolant has several
characteristics which are important for the oper-
ation of the cooling system:
• Corrosion inhibitor
• Antifreeze
• Increases the boiling point
The coolant should always contain 35-55% by
volume of antifreeze and corrosion inhibitor so
that the coolant properties ensure that the coolant
works correctly.
Note:
The coolant should be changed when the cooling
system is cleaned: every 6,000 hours or at least
every 5 years. Refer to Changing coolant.
Coolant resistance to cold
The following example shows coolant properties
with 30 percent by volume of antifreeze and cor-
rosion inhibitor:
• Ice slush starts to form at -16°C (3°F).
• At -30°C (-22°F), there is a risk of cooling
system malfunction.
• There is no risk of damage by freezing with a
minimum antifreeze and corrosion inhibitor
content of 35 percent by volume.
The chart depicts coolant properties at different
percents of antifreeze and corrosion inhibitor
concentration by volume.
Curve A: Ice formation starts (ice slush)
Curve B: Damage by freezing occurs
Area 1: Safe area
Area 2: Malfunctions may occur (ice
slush)
OPM 250 en-GB
0
-10
-16
-20
-30
-40
-50
°C
40
© Scania CV AB 2016, Sweden
0 10 20 30 40 50
1
3 2
B A
Cooling system
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