Lexus NX: Thermostat

Components

COMPONENTS

ILLUSTRATION

*1	THERMOSTAT	*2	WATER INLET
*3	GASKET	-	-
	N*m (kgf*cm, ft.*lbf): Specified torque	●	Non-reusable part

Removal

REMOVAL

PROCEDURE

1. DRAIN ENGINE COOLANT

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2. DISCONNECT WATER INLET

(a) Remove the 2 nuts and disconnect the water inlet.

3. REMOVE THERMOSTAT

(a) Remove the thermostat.

(b) Remove the gasket from the thermostat.

Inspection

INSPECTION

PROCEDURE

1. INSPECT THERMOSTAT

HINT:

The valve opening temperature is inscribed on the thermostat.

(a) Immerse the thermostat in water, and then gradually heat the water.

(b) Check that the valve of the thermostat opens at the specified temperature.

Standard valve opening temperature:

78 to 82°C (172 to 180°F)

If the valve does not open as specified, replace the thermostat.

(c) Check the valve lift. Standard valve lift: 10 mm (0.394 in.) or more at 93°C (199°F) If the valve lift is not as specified, replace the thermostat.

*a Valve Lift

(d) Check that the valve is fully closed when the thermostat is at a low temperature (below 75°C (167°F)).

If the valve is not fully closed, replace the thermostat.

Installation

INSTALLATION

PROCEDURE

1. INSTALL THERMOSTAT

(a) Install a new gasket to the thermostat.

(b) Install the thermostat with the jiggle valve facing upward. HINT: The jiggle valve may be set to within 10° on either side of the prescribed position.

*a Jiggle Valve

2. CONNECT WATER INLET

(a) Connect the water inlet with the 2 nuts.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

3. ADD ENGINE COOLANT

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4. INSPECT FOR COOLANT LEAK

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