Maintenance and care
25
Adding coolant / Bleeding cooling sys-
tem
(when engine has cooled down)
The engine cooling system should be
filled with a mixture of potable tap water
and antifreeze based on ethylene glycol
and anti-corrosion agent (see “Fuel, Lu-
bricants and Coolants for MAN Industrial
Gas Engines”).
Coolant must be added in accordance
with the filling instructions issued by the
manufacturer of the block-type thermal
power plant. Do not add cold coolant to a
warm engine. Ensure that the water / anti-
freeze ratio is the same as before addition
of the coolant.
D Unscrew cover
D Add coolant slowly
D Screw the cover back on
D Run the engine for a short time and
then check the coolant level again.
Danger:
If in exceptional circumstances, it is necessary to check the coolant level when
the engine is warm or to open the cooling circuit, the safety instructions of the
manufacturer of the power plant must be followed.
Incorrect addition of antifreeze and anti-corrosion agent may lead to deposits of lime and
rust in the engine coolant circuit, which impairs the cooling effect.
In such cases the coolant circuit must be cleaned at suitable intervals.
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