Scania PDE - Checking Antifreeze and Corrosion Inhibitor

OPM 250 en-GB 46
©
Scania CV AB 2016, Sweden
Cooling system
Checking antifreeze and cor-
rosion inhibitor
Note:
Use only pure fresh water that is free from parti-
cles, sludge and other impurities.
1. Pour a small amount of coolant into a con-
tainer and check that the coolant is pure and
clear.
2. Change the coolant if it is contaminated or
cloudy.
3. Measure the antifreeze content with one of
the following instruments:
The following rules apply to ethylene glycol-
based coolant:
• The antifreeze and corrosion inhibitor content
must be minimum 35 percent by volume for
corrosion protection to be sufficient.
• An antifreeze and corrosion inhibitor content
greater than 55 percent by volume impairs the
ability to protect against frost.
• If ice forms in the coolant, there are disrup-
tions initially, but there is no immediate risk
of damage. The engine should not be subject-
ed to heavy loads when ice starts to form.
Part No. Designation
588 805 Refractometer
588 226 Refractometer