Thermostat Removal

Engine. Lexus Is250, Is220D. Gse20 Ale20
2Ad-Fhv Cooling. Lexus Is250, Is220D. Gse20 Ale20

  1. REMOVE COOL AIR INTAKE DUCT SEAL

  2. REMOVE NO. 1 ENGINE COVER

  3. REMOVE NO. 1 INLET AIR CLEANER

  4. REMOVE ENGINE ROOM SIDE COVER LH

  5. REMOVE ENGINE UNDER COVER

  6. DRAIN ENGINE COOLANT

  7. REMOVE WIRING HARNESS CLAMP BRACKET

  8. REMOVE NO. 2 EGR PIPE

  9. REMOVE NO. 1 WATER OUTLET PIPE

  10. REMOVE AIR PIPE SUB-ASSEMBLY

  11. REMOVE NO. 4 AIR HOSE

  12. DISCONNECT RADIATOR OUTLET HOSE

  13. REMOVE WATER INLET

  14. REMOVE THERMOSTAT

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 NO. 1 ENGINE COVER


    Lexus Is250, Is220D. Gse20 Ale20
  1. Remove the No. 1 engine cover.



3. REMOVE NO. 1 INLET AIR CLEANER


    Lexus Is250, Is220D. Gse20 Ale20
  1. Remove the bolt, clip and inlet air cleaner.



4. REMOVE ENGINE ROOM SIDE COVER LH


    Lexus Is250, Is220D. Gse20 Ale20
  1. Remove the 4 clips and side cover.



5. REMOVE ENGINE UNDER COVER


6. 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.



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


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal

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


7. REMOVE WIRING HARNESS CLAMP BRACKET


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Disconnect the wiring harness clamp.



    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Disconnect the 6 wire harness clamps (*1).

  1. Disconnect the EGR valve connector (*2).

  1. Disconnect the oil pressure switch assembly connector (*3).



    Lexus Is250, Is220D. Gse20 Ale20
  1. Remove the 2 bolts and wire harness clamp bracket.



8. REMOVE NO. 2 EGR PIPE


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Remove the 2 nuts, 2 bolts and No. 2 EGR pipe.



9. REMOVE NO. 1 WATER OUTLET PIPE


    Lexus Is250, Is220D. Gse20 Ale20
  1. Disconnect the manifold absolute pressure sensor connector and vacuum hose.



    Lexus Is250, Is220D. Gse20 Ale20
  1. Remove the insulator.



    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Disconnect the 2 water hoses.

  1. Remove the 3 bolts and No. 1 water outlet pipe.



10. REMOVE AIR PIPE SUB-ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Disconnect the 2 diesel throttle body connectors.



    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Loosen the 3 hose bands.

  1. Disconnect the intake air temperature sensor connector.



    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Remove the bolt and air pipe sub-assembly.

  1. Disconnect the wire harness clamp.



11. REMOVE NO. 4 AIR HOSE


12. DISCONNECT RADIATOR OUTLET HOSE


    Lexus Is250, Is220D. Gse20 Ale20
  1. Separate the wire harness clamp from the water inlet.



    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Loosen the clip and disconnect the radiator outlet hose.



13. REMOVE WATER INLET


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Cooling.Cooling System.Thermostat  Removal
  1. Remove the 3 bolts and water inlet.



14. REMOVE THERMOSTAT


    Lexus Is250, Is220D. Gse20 Ale20
  1. Remove the thermostat and water inlet housing gasket.