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

Click here

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

Click here

4. INSPECT FOR COOLANT LEAK

Click here

READ NEXT:

 Water Pump

 Components

COMPONENTS ILLUSTRATION *1 ENGINE WATER PUMP ASSEMBLY *2 FAN AND GENERATOR V BELT *3 RADIATOR RESERVE TANK ASSEMBLY *4 V-RIBBED BELT TENSIONER ASSEMBLY *5 WATER BY-PASSS HOSE

 On-vehicle Inspection

ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT HINT: Water Pump Construction Evaporation Port and Drain Plug: *1 Evaporation Port *2 Mechanical Seal *3 Fluid Catch Pocket *4 Drai

SEE MORE:

 Driver Side Door Entry Unlock Function does not Operate

DESCRIPTION If the entry unlock function does not operate for the driver door only, but the entry lock function operates, the request code is being transmitted properly from the driver door. In this case, there may be a problem related to the unlock sensor (connection between the certification ECU (

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK FOR DTCS (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. (e) Check the DTCs and freeze frame data, and then write them down. (f) Check the detail

© 2016-2025 Copyright www.lexunx.com