Removal and Installation

THERMOSTAT AND THERMOSTAT HOUSING

Removal and Installation


WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure 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.

CAUTION:
- Perform when engine is cold.
- Do not spill coolant on the drive belt.
- Do not spill engine oil on rubber parts such as the drive belt or engine mounting insulators.
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.

REMOVAL

1.Drain coolant from radiator. Refer to "Changing Engine Coolant" Service and Repair.
2.Disconnect coolant reservoir hose and remove coolant reservoir tank.
3.Remove engine under cover. Refer to "Exploded View" Exploded View.
4.Disconnect LH VTC solenoid harness connector.
5.Remove the lower radiator hose.





6.Remove thermostat assembly (water inlet).
-Do not disassemble thermostat assembly (water inlet).
Replace as a unit, (if necessary).

INSPECTION AFTER REMOVAL

Revision: March 20122013 Infiniti JX





- 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 thermostat 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 thermostat values are out of standard range, replace water inlet and thermostat assembly.

INSTALLATION

Installation is in the reverse order of removal.
- After installation, refill coolant and check for leaks. Refer to "Changing Engine Coolant" Service and Repair and "System Inspection" Initial Inspection and Diagnostic Overview.

CAUTION:
Do not spill coolant in engine compartment. Use a shop cloth to absorb coolant.
Revision: March 20122013 Infiniti JX