Thermostat Removal

Engine. Lexus Is250, Is220D. Gse20 Ale20
4Gr-Fse Cooling. Lexus Is250, Is220D. Gse20 Ale20

  1. REMOVE COOL AIR INTAKE DUCT SEAL

  2. REMOVE V-BANK COVER SUB-ASSEMBLY

  3. REMOVE NO. 1 INLET AIR CLEANER

  4. DRAIN ENGINE COOLANT

  5. SEPARATE RADIATOR OUTLET HOSE

  6. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

Thermostat -- Removal



1. REMOVE COOL AIR INTAKE DUCT SEAL


    Lexus Is250, Is220D. Gse20 Ale20

  1. Remove the 11 clips and intake duct seal.



2. REMOVE V-BANK COVER SUB-ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20

  1. Raise the V-bank cover to disengage the clip on the rear of the cover. Raise the cover again to disengage the 2 clips on the front of the cover and remove the cover.

    NOTICE:
    Attempting to disengage both front and rear clips at the same time may cause the cover to break.


3. REMOVE NO. 1 INLET AIR CLEANER


    Lexus Is250, Is220D. Gse20 Ale20

  1. Remove the bolt, clip and inlet air cleaner.



4. DRAIN ENGINE COOLANT
NOTICE:
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 reservoir tank cap.



  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 Is250, Is220D. Gse20 Ale20.4Gr-Fse Cooling.Cooling System.Thermostat Removal



5. SEPARATE RADIATOR OUTLET HOSE


    Lexus Is250, Is220D. Gse20 Ale20

  1. Disconnect the hose from the water inlet with thermostat.



6. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20

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