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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System - Service Information >> Thermostat >> Installation [11/2021 - ] >> Procedure

Installation [11/2021 - ]: Procedure

  1. INSTALL WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 
    1. GTY1077714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install a new gasket to the water inlet with thermostat sub-assembly.

        HINT: 

        Be sure to clean the contact surfaces.

      2. Using an 8 mm socket wrench, install the water inlet with thermostat sub-assembly with the 2 bolts.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  2. CONNECT NO. 7 WATER BY-PASS HOSE 
    1. GTY1078180Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A *b 15°
      *c 90° (Tabs of Clip Installation Area) *d Upper Side of Vehicle
      *e Front Side of Vehicle *f 1 mm (0.0394 in.) or more
      1. Connect the No. 7 water by-pass hose to the water inlet with thermostat sub-assembly and slide the clip to secure it.
        NOTE:

        Make sure that the tabs of the clip are within the area shown in the illustration.

  3. CONNECT NO. 2 RADIATOR HOSE 
    Refer to PROCEDURE - Step 39 [11/2021 - 03/2024] , or refer to PROCEDURE - Step 36 [03/2024 - ]
  4. INSTALL INTAKE MANIFOLD 

    Refer to INSTALLATION [11/2021 - ]

  5. ADD ENGINE COOLANT (for Engine) 

    Refer to PROCEDURE - Step 5

  6. INSPECT FOR COOLANT LEAK (for Engine) 

    Refer to PROCEDURE - Step 1

  7. INSTALL NO. 1 ENGINE UNDER COVER 

    Refer to PROCEDURE - Step 68 [11/2021 - 03/2024] , or refer to PROCEDURE - Step 64 [03/2024 - ]

  8. INSTALL FRONT FENDER FRONT SPLASH SHIELD RH 
  9. INSTALL FRONT FENDER FRONT SPLASH SHIELD LH