Coolant Line/Hose: Service and Repair

WATER OUTLET AND WATER CONTROL VALVE

Exploded View CO-21:

Exploded View CO-22:

Removal and Installation

REMOVAL
1. Drain engine coolant.

CAUTION: Perform this step when the engine is cold.

2. Remove air duct and cleaner.
3. Remove radiator hose (upper).
4. Remove heater hoses and water hoses.
5. Remove water outlet.
6. Remove water control valve.
7. Remove engine coolant temperature sensor, if necessary.

CAUTION:
^ Handle carefully to avoid any shock to engine coolant temperature sensor.
^ Replace the gaskets and rubber rings with a new ones.

INSPECTION AFTER REMOVAL





^ Place a thread (A) so that it is caught in the valves of water control valve (1). Immerse fully in a container (B) filled with water. Heat while stirring.
^ The valve opening temperature is the temperature at which the valve opens and falls from the thread.
^ Continue heating. Check the full open valve lift amount.

NOTE: The maximum valve lift amount standard temperature for water control valve is the reference value.

^ After checking the maximum valve lift amount, lower the water temperature and check the valve closing temperature.





^ If out of the specification, replace water control valve.

INSTALLATION
Installation is in the reverse order of removal.

Water Control Valve

CAUTION: Replace the rubber ring with a new one.





^ Install water control valve while making rubber ring (1) groove fit to water control valve flange (A) around the whole circumference.





^ While the mark (A) points to up, install water control valve (2) with frame center (B) facing straight upward into water outlet (1).

Water Outlet
Install the water control valve to the cylinder head without displacing the valve from the valve position.

Water Hoses (M/T models)





Install water hoses (3), (5) as shown.
^ Electric throttle control actuator (1)
^ Clamp (2)
^ Water outlet (4)
^ Paint mark (A)
^ Clamp shall not interfere with the bulged area (B)

Water hoses (CVT models)





Install water hoses (3), (5) as shown.
^ Electric throttle control actuator (1)
^ Clamp (2)
^ Water outlet (4)
^ Paint mark (A)
^ Clamp shall not interfere with the bulged area (B)

INSPECTION AFTER INSTALLATION
^ Check for leaks of engine coolant.
^ Start and warm up the engine. Visually check if there is no leaks of engine coolant.