Lexus IS250 · Service Manual ENGINE

REMOVAL

Removal / installation


1. REMOVE COOL AIR INTAKE DUCT SEAL

  1. A127530
    Remove the 11 clips and intake duct seal.


2. REMOVE ENGINE ROOM SIDE COVER LH

  1. A123702E01
    Remove the 5 clips and side cover.


3. REMOVE ENGINE ROOM SIDE COVER RH

  1. A123703E01
    Remove the 2 clips and side cover.


4. REMOVE V-BANK COVER SUB-ASSEMBLY

  1. A127528
    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.


5. REMOVE FRONT FENDER PROTECTOR UPPER LH

  1. E119591
    Using a clip remover, separate the clip on the rubber portion of the cowl top ventilator louver sub-assembly from the front upper fender protector LH.

  1. Disengage the 3 clips and the claw to remove the front fender protector upper LH.


6. REMOVE FRONT FENDER PROTECTOR UPPER RH

HINT:
Removal procedure of the RH side is the same as that of the LH side.


7. REMOVE ROOF DRIP SIDE FINISH MOULDING LH

  1. Put protective tape around the roof drip side finish moulding.

  1. Using a moulding remover, disengage the 6 clips and remove the roof drip side finish moulding.

    NOTICE:
    1. Do not remove the clips.
    2. If the clips are damaged or fall off, replace them with new clips.


    B125564E01


8. REMOVE ROOF DRIP SIDE FINISH MOULDING RH

HINT:
Removal procedure of the RH side is the same as that of the LH side.


9. REMOVE FRONT WIPER ARM HEAD CAP

  1. E119593E01
    Using a screwdriver, remove the front wiper arm head cap.

    HINT:
    1. Use the same procedures for the RH side and the LH side.
    2. Tape the screwdriver tip before use.


10. REMOVE WINDSHIELD WIPER ARM AND BLADE ASSEMBLY LH

  1. E119604
    Remove the nut and the front wiper arm and blade assembly LH.


11. REMOVE WINDSHIELD WIPER ARM AND BLADE ASSEMBLY RH

  1. E119605
    Remove the nut and the front wiper arm and blade assembly RH.


12. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY

  1. E119595
    Remove the 2 clips.

  1. E119597
    Disengage the 11 claws, and pull out the cowl top ventilator louver sub-assembly.


13. 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.


    A120242E01


14. DISCONNECT NO. 2 VENTILATION HOSE

  1. A103629
    Disconnect the ventilation hose from the cylinder head.


15. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE

  1. A124986
    Disconnect the MAF meter connector.

  1. Disconnect the clamp from the air cleaner.

  1. A103631
    Disconnect the VSV hose.

  1. A126225
    Disconnect the 4 clamps.

  1. Remove the hose clamp and air cleaner cap with air cleaner hose.


16. REMOVE THROTTLE BODY

  1. Disconnect the throttle motor connector.

  1. A103952
    Remove the 4 bolts and disconnect the throttle body from the intake air surge tank.

  1. A103634
    Disconnect the 2 water by-pass hoses from the throttle body.

  1. Remove the throttle body and gasket.


17. REMOVE INTAKE AIR SURGE TANK ASSEMBLY

  1. A125211
    Disconnect the vacuum hose from the intake air surge tank.

  1. Remove the bolt and disconnect the No. 1 vacuum switching valve assembly from the intake air surge tank.

  1. A123886
    Disconnect the wire harness and hose from the surge tank.

  1. A126653
    Disconnect the ventilation hose from the intake air surge tank.

  1. A122441
    Remove the bolt and water hose joint from the intake air surge tank.

  1. A126654
    Remove the bolt and disconnect the surge tank stay.

  1. A103645
    Using a 5 mm hexagon socket wrench, remove the 7 bolts, 2 nuts and gasket.


18. REMOVE INTAKE MANIFOLD

  1. Disconnect the connector for the SCV.

  1. Disconnect the SCV position sensor connector.

  1. A103762E01
    Remove the 4 bolts, 4 nuts, intake manifold and gasket.


19. REMOVE ENGINE COOLANT TEMPERATURE SENSOR

  1. A105309
    Disconnect the engine coolant temperature sensor connector.

  1. Remove the engine coolant temperature sensor.

  1. Remove the gasket from the engine coolant temperature sensor.

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