Ch. 13 COOLING SYSTEM
13-5
System Test
Test on the filler cap
Hermetically seal the filler cap, apply water and
pressure to the filler cap. Replace it with new one if
found failing to maintain the specified pressure
within a given time limit, or the opening pressure is
too high or too low. The specified pressure shall be
maintained at least for 6 seconds in the test.
Relief pressure for the filler cap:
0.9 ~ 1.05 kgf/cm
2
Apply pressure to the radiator, engine and water
hose to check for any leakage
Caution
High pressure may damage the radiator.
Never use pressure which exceeds 1.05 kg/cm2.
If the system fails to maintain the specified
pressure for at least 6 seconds, repair or replace
parts.
Change of coolant
Warning
Never attempt to carry out service work on the
cooling system unless the engine is completely
cooled down, otherwise, you may get scalded.
Remove the front center cover, and then remove
filler cap. Place a water pan under the water pump;
loosen the drain bolt to drain out the coolant.
reinstall the drain bolt.
Refilling system with coolant and bleeding the air
bubbles. Run the engine, and remove by-pass pipe.
Check by-pass hole whether has the air bubble to
emit. If emits without the air bubble, only has the
coolant to flow out, then backflow pipe joint on,
engine flameout.
Remove radiator filler cap.
Starts the engine, inspects does not have the air
bubble in the radiator coolant, also the coolant liquid
level is stable. stop the engine.
Add coolant to proper level if necessary.
Caution
In order to avoid the water tank rusting,
please do not use the unclear trade mark
refrigerant.
Check reserve tank
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