Coolant Outlet: Service and Repair

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 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.Drain engine coolant from the radiator. Service and Repair.
2.Remove the front air duct. Service and Repair.
3.Remove engine undercover. Coupe (Coupe models) or Sedan (Sedan models).
4.Remove radiator hose (lower) from the engine coolant inlet side.
5.Remove engine coolant inlet, thermostat and O-ring.

CAUTION:
Do not reuse O-ring.

INSPECTION AFTER REMOVAL






- Place a thread so that it is caught in the valves of the thermostat.
CO
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.





- If valve setting at measured values are out of standard range, replace thermostat.

INSTALLATION

Installation is in the reverse order of removal.
- Install the engine coolant temperature sensor.
Use Genuine RTV Silicone Sealant or equivalent. Recommended Chemical Products And Sealants.





- Install the thermostat with the whole circumference of the flange part fitting securely inside the rubber ring.

CAUTION:
Do not reuse O-ring.
- Install the thermostat with the jiggle valve facing upwards. The position deviation may be within the range of �
10�.
- If necessary, to install the heater pipe, first apply a mild soap to the
O-ring and then quickly insert the pipe into the housing.

CAUTION:
Do not reuse O-ring.