Cooling system
OPM 200 en-GB 64
© Scania CV AB 2020, Sweden
Addition of antifreeze and corrosion
inhibitor to water
The coolant should contain 35-55% by volume
antifreeze (ethylene glycol) and corrosion inhib-
itor. The percentage varies depending on the
need for antifreeze.
A minimum of 35% by volume of Scania anti-
freeze and corrosion protection is needed to pro-
vide sufficient corrosion protection.
Measure the ethylene glycol content (antifreeze
and corrosion protection) with a refractometer
following the instructions in the Checking the
coolant's antifreeze and corrosion protection sec-
tion.
Risk of freezing
The engine should not be subjected to heavy
loads when ice starts to build up in the cooling
system.
As the coolant starts to freeze, the water in the
coolant starts to crystallise and the percentage of
ethylene glycol in the coolant therefore rises. If
freezing produces a great increase in the amount
of ice, circulation problems could arise. There is
no risk of damage by freezing if the content of
Scania antifreeze and corrosion inhibitor, or an
equivalent mixture of a similar product, is at
least 35% by volume.
Minimal ice formation in the coolant sometimes
causes disruptions without any risk of damage.
For example, the auxiliary heater may not work
for up to one hour after the engine has been start-
ed.
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