Thermostat And Thermostat Housing

THERMOSTAT AND THERMOSTAT HOUSING


Removal and Installation












WARNING:
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 engine is cool.
1. Drain engine coolant from the radiator. Refer to Service and Repair.
2. Remove coolant reservoir tank. Refer to Service and Repair.
3. Remove water drain plug on water pump side of the engine. Refer to Disassembly And Assembly.
4. Disconnect IVT control valve connector.
5. Disconnect radiator hose (lower).





6. Remove engine coolant inlet and thermostat assembly.
- Do not disassemble engine coolant inlet and thermostat.
Replace them as a unit, if necessary.

INSPECTION AFTER REMOVAL





- Place a thread so that it is caught in the valves 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 the falls from the thread.
- Continue heating. Check the full-open lift amount.

NOTE:
The full-open lift amount standard temperature for the thermostat is the reference value.
- 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.





- Install thermostat with jiggle valve facing upward.
- After installation refill engine coolant and check for leaks. Refer to Service and Repair and Testing and Inspection.

CAUTION:
Do not spill coolant in engine compartment. Use a shop cloth to absorb coolant.