Thermostat Removal

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Cooling. Lexus Gs430, Gs300. Uzs190 Grs190

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

  2. REMOVE ENGINE UNDER COVER

  3. DRAIN ENGINE COOLANT

  4. REMOVE V-BANK COVER SUB-ASSEMBLY

  5. REMOVE COOL AIR INTAKE DUCT SEAL

  6. REMOVE NO. 1 AIR CLEANER INLET

  7. REMOVE INTAKE AIR CONNECTOR PIPE

  8. REMOVE WATER INLET

  9. REMOVE THERMOSTAT

Thermostat -- Removal



1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.


2. REMOVE ENGINE UNDER COVER


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Using a clip remover, remove the 3 clips.

  1. Remove the 10 screws and under cover.



3. DRAIN ENGINE COOLANT
CAUTION:
Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

  1. Remove the radiator cap and vent plug.



  1. Loosen the radiator drain cock plug and 2 cylinder block drain cock plugs. Then drain the coolant.

    HINT:
    Collect the coolant in a container and dispose of it according to the regulations in your area.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Cooling.Cooling System.Thermostat Removal



4. REMOVE V-BANK COVER SUB-ASSEMBLY

  1. Remove the 2 bolts and cover.



5. REMOVE COOL AIR INTAKE DUCT SEAL


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Using a clip remover, remove the 7 clips and duct seal.



6. REMOVE NO. 1 AIR CLEANER INLET

  1. Remove the bolt and inlet.



7. REMOVE INTAKE AIR CONNECTOR PIPE


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the air hose and No. 1 ventilation hose.

  1. Loosen the 2 hose clamps and remove the intake air connector.



8. REMOVE WATER INLET


Lexus Gs430, Gs300. Uzs190 Grs190

  1. Remove the 3 nuts, water inlet and gasket.



9. REMOVE THERMOSTAT

  1. Remove the thermostat from the water inlet.