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3-6 COOLING SYSTEM
Coolant
•
Install the coolant drain plug.
○
Replace the gasket with a new one.
Torque - Coolant Drain Plug (Water Pump): 8.8 N·m (0.90
kgf·m, 78 in·lb)
•
Fill the radiator up to the bottom of the radiator filler neck
[B] with coolant [A], and install the cap, turning it clockwise
about 1/4 turn.
NOTE
○
Pour in the coolant slowly so that it can expel the air
from the engine and radiator. The radiator cap must be
installed in two steps. First turn the cap clockwise to the
first s top. Then push down on it and turn it the rest of
the way.
•
Check the cooling system for leaks.
Air Bleeding
•
Bleed the air from the cooling system as follows.
○
Loosen the air bleeder bolt [A] on the cylinder head until
the coolant begins to flow out the air bleeder bolt hole (that
is, until all the remaining air has been forced out).
○
Tighten the air bleeder bolt.
Torque - Air Bleeder Bolt: 8.8 N·m (0.90 kgf·m, 78 in·lb)
○
Start the engine with the radiator cap removed and run it
until no more air bubbles [A] can be seen in the coolant.
○
Tap the cooling hoses to force any air bubbles caught
inside.
○
Stop the engine and add coolant up to the filler neck.
•
Check the cooling system for leaks.
•
Install the radiator cap.
○
The radiator cap must be installed in two steps. First turn
the cap clockwise to the first stop. Then push down on it
and turn it the rest of the way.
Cooling System Pressure Testing
CAUTION
During pressure testing, do not exceed the pres-
sure for which the system is designed to work. The
maximum pressure is 123 kPa (1.25 kgf/cm², 18 psi).
•
Remove the radiator cap, and install a cooling system
pressure tester [A] and adapter [B] on the radiator filler
neck [C].
NOTE
○
Wet the adapter cap sealing surfaces with water or
coolant to prevent pressure leaks.