Table of Contents
Advertisement
4. Regular inspection
Cooling system
General Information
The coolant should be replaced according to the cycle spec-
ified in the inspection interval table. If the coolant gets dirty,
the engine is overheated, and the coolant overflows 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 anti-
freeze per ambient temperature as shown in the table below.
The freezing point per antifreeze ratio shown in the table may
differ slightly depending on the antifreeze type. For more
information, see the specifications provided by the manufac-
turer.
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
Ambient tem-
Coolant (%)
perature (°C)
Above -10
-10
-15
-20
-25
-30
-40
Capacity of coolant
Engine Mode
Inside engine
DP 158L
About 23
Antifreeze (%)
85
15
80
20
73
27
67
33
60
40
56
44
50
50
Coolant capacity ( ℓ )
With radiator
About 79
(Air on 43°c)
About 90
(Air on 52°c)
Engine Mode
DP180L
DP 222L
Checking the Coolant
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 abso-
lutely 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.
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 concentration
of antifreeze and additives.
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.
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 corro-
sion inhibitor using the coolant test sheet.
44
Coolant capacity ( ℓ )
Inside engine
With radiator
About 91
(Air on 43°c)
About 27
About 114
(Air on 43°c)
About 114
(Air on 43°c)
About 33
About 125
(Air on 52°c)
DANGER
DANGER
Advertisement
Chapters
Table of Contents
