Nissan Rogue Service Manual: Thermostat and water control valve

Exploded View

1. Water inlet
2.  Thermostat
3.  Rubber ring

1.  To radiator hose (lower)

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

Removal and Installation

WARNING: Do not 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 push down and turn it a quarter turn to allow built-up pressure to escape. Carefully remove the cap by pushing it down and turning it all the way.

REMOVAL

1.  Drain engine coolant from the radiator. Refer to CO-8, "Draining".

CAUTION:

•  Perform this step when the engine is cold.
•  Do not spill coolant on drive belt.

2.  Remove engine under cover. Refer to EXT-37, "ENGINE UNDER COVER : Removal and Installation".
3.  Remove radiator hose (lower) from the water inlet side.
4.  Remove exhaust manifold heat shield. Refer to EM-29, "Exploded View".
5.  Remove water inlet and thermostat.

INSTALLATION

Installation is in the reverse order of removal.

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

CAUTION:

•  Do not reuse rubber ring.
•  Ensure thermostat rubber ring mounting surface is free from dents or flaws.
• Install the thermostat with the jiggle valve facing upwards. The position deviation may be within the range of ±20°.
•  After installation, refill coolant and check for leaks. Refer to CO-9, "Refilling" and CO-8, "Inspection".

Inspection

INSPECTION AFTER REMOVAL

•  Place a thread (A) so that it is caught in the valves of thermostat (1) and water control valve. Immerse fully in a container (B) filled with water. Heat while stirring. (The example in the figure shows thermostat.)
•  The valve opening temperature is the temperature at which the valve opens and falls from the thread.
•  Continue heating. Check the maximum valve lift amount.

  NOTE: The maximum valve lift amount standard temperature for water control valve is the reference value.

•  After checking the maximum valve lift amount, lower the water temperature and check the valve closing temperature

Standard Thermostat : Refer to CO-25, "Thermostat".

• If out of the standard, replace either or both thermostat and water control valve.

INSPECTION AFTER INSTALLATION

•  Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the radiator cap tester (commercial service tool). Refer to CO-8, "Inspection".
•  Start and warm up engine. Check visually that there is no leakage of engine coolant.

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