Water Control Valve: Removal and Installation
Water Control Valve: Removal and InstallationWARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator.
Removal
CAUTION:
Perform when the engine cold.
1) Partially drain the engine coolant from the radiator.
2) Disconnect the heater hose and water hoses from the heater outlet.
3) Remove the heater outlet.
4) Remove the water control valve.
5) Remove the engine coolant temperature sensor, if necessary.
CAUTION:
Be careful not to damage engine coolant temperature sensor.
Inspection after Removal
^ Place a thread so that it is caught in the valve of the water control valve. Immerse fully in a container filled with water. Heat while stirring.
^ The valve opening temperature is the temperature at which the valve opens and the falls from the thread.
^ Continue heating. Check the full-open lift amount.
NOTE:
The full-open lift amount standard temperature for the water control valve is the reference value.
^ After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.
Standard values
Installation
Installation is in the reverse order of removal.
Water Control Valve
^ Install water control valve by making rubber ring (1) groove fit to water control valve flange (A) around the whole circumference.
^ Install water control valve with jiggle valve (A) facing upwards. The position deviation may be within the range of 20 degrees (b).
^ Install the engine coolant temperature sensor if removed. Use Genuine RTV Silicone Sealant or equivalent.