Removal and Installation

THERMOSTAT AND WATER PIPING


Removal and Installation


REMOVAL

Removal of Thermostat
1. Drain engine coolant from the radiator. Refer to Changing Engine Coolant.

CAUTION:
Perform when engine is cold.
2. Remove the air duct and resonator assembly. Refer to Removal and Installation.
3. Remove the engine room cover using power tools.
4. Disconnect the water suction hose from the water inlet.
5. Remove the water inlet and thermostat.

Removal of Thermostat Housing, Water Outlet and Heater Pipe
1. Remove the intake manifold. Refer to Removal and Installation.
2. Remove the thermostat housing, water outlet and heater pipe.

Removal of Water Cut Valve
1. Drain the engine coolant from the radiator. Refer to Changing Engine Coolant.

CAUTION:
Perform when the engine is cold.
2. Remove the air duct and resonator assembly. Refer to Removal and Installation.
3. Remove the engine room cover using power tool.
4. Disconnect the heater hose (heater core side).
5. Remove the heater hose bracket.
6. Disconnect the water cut valve connector.
7. Remove the water cut valve.

INSPECTION AFTER REMOVAL
- Place a thread so that it is caught in the valve of the thermostat.





Immerse fully in a container 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 lift amount.
- After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.






INSTALLATION
Installation is in the reverse order of removal.

Installation of Thermostat
- Install the thermostat with the whole circumference of each flange part fit securely inside the rubber ring as shown.





- Install the thermostat with the jiggle valve facing upwards.

Installation of Water Outlet Pipe and Heater Pipe
First apply a neutral detergent to the O-rings, then quickly insert the insertion parts of the water outlet pipe and heater pipe into the installation holes.

INSPECTION AFTER INSTALLATION
- Check for leaks of the engine coolant. Refer to Inspection.
- Start and warm up the engine. Visually check for leaks of the engine coolant.