Water Control Valve Removal and Installation

Water Control Valve: Removal and Installation

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.

Removal

CAUTION:

Perform when the engine is cold.

1) Remove air ducts and resonator assembly.
2) Partially drain the engine coolant from the radiator. Refer to [Changing Engine Coolant] Service and Repair.
3) Remove radiator hose (upper) from the water outlet.
4) Remove the heater outlet.
5) Remove the water control valve.

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 is the reference value.

- After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.

[Recommended Chemical Products and Sealants] [1][2]Cooling System [1][2]Cooling System [1][2]Cooling System





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

Installation

Installation is in the reverse order of removal.

Water Control Valve

- Install water control valve by making O-ring (1) groove fit to water control valve flange (A) around the whole circumference.






CAUTION:
Do not reuse O-ring.

- Install water control valve with jiggle valve (A) facing upward. The position may deviate within the range of 20° (b).





- Install the engine coolant temperature sensor if removed.
Use Genuine RTV Silicone Sealant or equivalent. Refer to Recommended Chemical Products and Sealants.