4. Regular inspection
46
Cooling system
General Information
The coolant should be replaced according to the cycle
specified in the inspection interval table. If the coolant
gets dirty, the engine is overheated, and the coolant over-
flows in the thermal expansion tank.
Coolant standards
We recommend you to inject the antifreeze about
40~50% of the entire coolant. The antifreeze prevents the
freezing and corrosion of the system, and increases the
boiling point of water. In winter, you may need to change
the amount of antifreeze per ambient temperature as
shown in the table below. The freezing point per anti-
freeze ratio shown in the table may differ slightly
depending on the antifreeze type. For more information,
see the specifications provided by the manufacturer.
Whenever you add coolant(water) to replenish the amount
reduced by engine operation, the antifreeze portion is
decreased. So, you need to increase the antifreeze level
to the proper level after replenishing the coolant.
•
concentration of antifreeze during winter
Capacity of coolant
Checking the Coolant
1. For the engine coolant, you should use clean tap
water.
2. To the engine coolant add 40% of antifreeze, and
3~5% of additive(DCA4) to prevent corrosion.
3. Periodically check coolant to maintain the concentra-
tion of antifreeze and additives.
4. The engine cylinder liner is of a wet type which
specially requires good coolant flow.
5. You can check the concentration of antifreeze and
corrosion inhibitor using the coolant test sheet.
Ambient tem-
perature (
°
C)
Coolant (
°
C)
Antifreeze (%)
Above -10
85
15
-10
80
20
-15
73
27
-20
67
33
-25
60
40
-30
56
44
-40
50
50
Engine Mode
Coolant capacity (
ℓ
)
Inside engine
With radiator
DP 158L
About 20
About 79
(Air on 43
°
c)
About 90
(Air on 52
°
c)
DP180L
About 21
About 91
(Air on 43
°
c)
About 114
(Air on 43
°
c)
DP 222L
About 23
About 114
(Air on 43
°
c)
About 125
(Air on 52
°
c)
DANGER
If the radiator cap is opened to exchange or
replenish coolant while the engine is overheated, hot
water will spurt out and may cause serious burns.
If it is absolutely necessary to open the radiator cap
while the engine is overheated, wrap the radiator cap
with a cloth and slowly open the cap in two steps
until the steam pressure has been released from the
inside. After the steam pressure has been completely
released, remove the radiator cap.
DANGER
If you keep the antifreeze and corrosion inhibitor at
a proper level, you can prevent the corrosion of
engine effectively and keep the quality of the engine.
Be careful that, if managed improperly, it can give a
fatal impact on the coolant pump and cylinder liner.
Engine Mode
Coolant capacity (
ℓ
)
Inside engine
With radiator
