Technical Information
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2.2.21. Draining of coolant
Drain coolant as follows when cooling
system has cooled down;
z
Remove cover from filler neck of
radiator.
z
Remove drain plug in the cylinder
block.
Improper mixing of anti-freeze and
corrosion inhibitors may lead to lime and
corrosion deposits in the engine cooling
system which can jeopardize cooling
efficiency.
In such cases it is necessary to clean the
cooling system at suitable intervals.
2.2.22. Cooling water
z
Regarding the cooling water that is to be used for engine, the soft water not the hard water must be
used.
z
The engine cooling water can be used diluting it with antifreezing solution 40 % and the additive for
rust prevention (DCA4) 3 ~ 5 %.
z
The density of above solution and additive must be inspected every 500 hours to maintain it
properly.
NOTE :
The proper density control of antifreezing solution and rust preventing additive will
be able to prevent the rusting effectively and maintain the stable quality of engine.
For the improper control might give the fatal damage to the cooling water pump and
cylinder liners, detail care is needed.
EA6O5010
Drain Valve
EA5O4002
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