Intake Manifold Removal

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

  1. DISCHARGE FUEL SYSTEM PRESSURE

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

  3. DRAIN ENGINE COOLANT

  4. REMOVE V-BANK COVER ASSEMBLY

  5. REMOVE COOL AIR INTAKE DUCT SEAL

  6. REMOVE AIR CLEANER INLET

  7. REMOVE ENGINE ROOM SIDE COVER RH

  8. REMOVE ENGINE ROOM SIDE COVER LH

  9. REMOVE INTAKE AIR CONNECTOR PIPE

  10. REMOVE THROTTLE BODY ASSEMBLY

  11. REMOVE NO. 4 V-BANK COVER BRACKET

  12. REMOVE V-BANK COVER BRACKET

  13. REMOVE VACUUM SWITCHING VALVE ASSEMBLY (for EVAP)

  14. REMOVE NO. 2 V-BANK COVER BRACKET

  15. REMOVE NO. 3 V-BANK COVER BRACKET

  16. DISCONNECT ENGINE WIRE

  17. DISCONNECT NO. 2 FUEL PIPE SUB-ASSEMBLY

  18. REMOVE INTAKE MANIFOLD SUB-ASSEMBLY

Intake Manifold -- Removal



1. DISCHARGE FUEL SYSTEM PRESSURE
NOTICE:
  1. Perform the following procedures to prevent fuel from spilling out before removing any fuel system parts.
  1. Pressure will still remain in the fuel line even after performing the following procedures. When disconnecting the fuel line, cover it with a shop rag or a piece of cloth to prevent fuel from spraying.

  1. Remove the F/PMP fuse.

    1. Remove the engine room No. 2 relay block cover upper.

    2. Remove the F/PMP fuse.

    3. Start the engine.

    4. After the engine has stopped, turn the engine switch off.

      HINT:
      DTC P0171/25 (fuel problem) and/or P0191/49 (fuel pressure sensor signal error) may be detected.

    5. Crank the engine again. Check that the engine does not start.

    6. Remove the fuel tank cap to discharge pressure from the fuel tank.

    7. Reinstall the F/PMP fuse.

  1. Disconnect the fuel pump connector.

    1. Remove the rear seat cushion.

    2. Remove the rear floor service hole cover.

    3. Disconnect the fuel pump connector.

    4. Start the engine.

    5. After the engine has stopped, turn the engine switch off.

      HINT:
      DTC P0171/25 (fuel problem) and/or P0191/49 (fuel pressure sensor signal error) may be detected.

    6. Crank the engine again. Check that the engine does not start.

    7. Remove the fuel tank cap to discharge pressure from the fuel tank.

    8. Reconnect the fuel pump connector.

    9. Install the rear floor service hole cover.

    10. Install the rear seat.



2. 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.


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 Intake.Intake System.Intake Manifold Removal



4. REMOVE V-BANK COVER ASSEMBLY

  1. Remove the 2 nuts 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 AIR CLEANER INLET

  1. Remove the bolt and inlet.



7. REMOVE ENGINE ROOM SIDE COVER RH


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Intake.Intake System.Intake Manifold Removal

  1. Remove the nut, 2 clips and side cover.



8. REMOVE ENGINE ROOM SIDE COVER LH


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Intake.Intake System.Intake Manifold Removal

  1. Remove the 3 clips and side cover.



9. 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.



10. REMOVE THROTTLE BODY ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Disconnect the PCV hose hose.

  1. Disconnect the connectors and wire.

  1. Disconnect the 2 water by-pass hoses.



    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Remove the 2 bolts, 2 nuts, throttle body and gasket.



11. REMOVE NO. 4 V-BANK COVER BRACKET

  1. Disconnect the connector as shown in A in the illustration below.

  1. Remove the bolt and bracket.



12. REMOVE V-BANK COVER BRACKET

  1. Remove the bolt and bracket as shown in B in the illustration below.



13. REMOVE VACUUM SWITCHING VALVE ASSEMBLY (for EVAP)

  1. Disconnect the connector from the VSV, as shown in C in the illustration below.

  1. Disconnect the vacuum hose from the VSV, as shown in C in the illustration below.

  1. Remove the bolt and VSV as shown in C in the illustration below.



14. REMOVE NO. 2 V-BANK COVER BRACKET

  1. Remove the bolt and bracket from the intake manifold, as shown in D in the illustration below.



15. REMOVE NO. 3 V-BANK COVER BRACKET

  1. Disconnect the connector.



  1. Remove the bolt and bracket as shown in E in the illustration below.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Intake.Intake System.Intake Manifold Removal



16. DISCONNECT ENGINE WIRE


Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Intake.Intake System.Intake Manifold Removal

  1. Remove the 3 bolts and disconnect the engine wire protector (LH side) from the intake manifold upper and camshaft bearing cap.

  1. Disconnect the 2 wire clamps on the engine wire (RH side) from the brackets on the RH delivery pipe.

  1. Remove the 2 bolts and disconnect the engine wire protector (rear side) from the rear water by-pass joint and RH cylinder head.



17. DISCONNECT NO. 2 FUEL PIPE SUB-ASSEMBLY

  1. Disconnect the No. 2 fuel pipe (Click here).



18. REMOVE INTAKE MANIFOLD SUB-ASSEMBLY


Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Intake.Intake System.Intake Manifold Removal

  1. Disconnect the 8 injector connectors.

  1. Remove the 6 bolts, 4 nuts, intake manifold and 2 gaskets.