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Installation [11/2021 - 03/2022]: Procedure

WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL STUD BOLT 
    NOTE:

    If a stud bolt is deformed or its threads are damaged, replace it.
    1. GTY1076928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 33.1 mm (1.30 in.) *b 15 mm (0.591 in.)
      *c 95 mm (3.74 in.) - -
      1. Using an E8 "TORX" socket wrench, install the stud bolt to the timing chain cover assembly.

        Torque: 9.8 N.m (100 kgf/cm, 87 in.lbf) 

  2. INSTALL WIRE HARNESS CLAMP BRACKET 
    1. GTY1075256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, install the wire harness clamp bracket to the No. 1 ventilation case with the 2 bolts.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  3. INSTALL NO. 2 VACUUM SWITCHING VALVE BRACKET 
    1. GTY1076840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, install the No. 2 vacuum switching valve bracket to the camshaft housing sub-assembly with the 2 bolts.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  4. INSTALL PURGE VALVE (PURGE VSV) 

    Refer to PROCEDURE - Step 1

  5. INSTALL NO. 3 EXHAUST MANIFOLD HEAT INSULATOR 

    Torque: 16 N.m (163 kgf/cm, 12 ft.lbf) 

  6. INSTALL ENGINE OIL LEVEL DIPSTICK GUIDE 
    1. GTY1077421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Apply a light coat of engine oil to a new O-ring.
      2. Install the O-ring to the engine oil level dipstick guide.
      3. Using an 8 mm socket wrench, install the engine oil level dipstick guide to the camshaft housing sub-assembly with the bolt.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

      4. Install the engine oil level dipstick.
  7. INSTALL IGNITION COIL ASSEMBLY 
    Refer to PROCEDURE - Step 2
  8. INSTALL FUEL INJECTOR SEAL 
    Refer to PROCEDURE - Step 1
  9. INSTALL INJECTOR VIBRATION INSULATOR 
    Refer to PROCEDURE - Step 2
  10. INSTALL C-RING 
    Refer to PROCEDURE - Step 3
  11. INSTALL NO. 1 FUEL INJECTOR BACK-UP RING 
    Refer to PROCEDURE - Step 4
  12. INSTALL NO. 3 FUEL INJECTOR BACK-UP RING 
    Refer to PROCEDURE - Step 5
  13. INSTALL NOZZLE HOLDER CLAMP 
  14. INSTALL DIRECT FUEL INJECTOR ASSEMBLY 
    Refer to PROCEDURE - Step 7
  15. INSTALL FUEL DELIVERY PIPE 
    Refer to PROCEDURE - Step 8
  16. INSTALL PORT FUEL INJECTOR ASSEMBLY 
    Refer to PROCEDURE - Step 1
  17. INSTALL NO. 5 ENGINE WIRE 
  18. INSTALL INJECTOR VIBRATION INSULATOR 
  19. INSTALL NO. 1 DELIVERY PIPE SPACER 
  20. INSTALL FUEL DELIVERY PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 5
  21. INSTALL NO. 6 ENGINE WIRE 

    Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  22. INSTALL SENSOR WIRE 
    1. GTY1075877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, install the sensor wire to the water inlet with thermostat sub-assembly with the bolt.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

      2. Engage the 3 clamps.
      3. Connect the 4 connectors.
  23. INSTALL NO. 7 WATER BY-PASS HOSE 
  24. INSTALL FUEL PUMP LIFTER ASSEMBLY 
    Refer to PROCEDURE - Step 1
  25. INSTALL FUEL PUMP SPACER GASKET 
  26. TEMPORARILY INSTALL FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 
    Refer to PROCEDURE - Step 3
  27. TEMPORARILY INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 4
  28. INSTALL FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 
    Refer to PROCEDURE - Step 5
  29. INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 6
  30. CONNECT FUEL TUBE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 7
  31. INSTALL NO. 1 INTAKE MANIFOLD TO HEAD GASKET 
  32. INSTALL INTAKE MANIFOLD 
    Refer to PROCEDURE - Step 4
  33. INSTALL NO. 2 WATER BY-PASS PIPE 

    Refer to PROCEDURE - Step 6

  34. INSTALL NO. 3 WATER BY-PASS PIPE 
    1. GTY1077164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the No. 3 water by-pass pipe to the water outlet and slide the clip to secure it.
      2. Using an 8 mm socket wrench, connect the No. 3 water by-pass pipe to the intake manifold with the bolt.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  35. SET EGR VALVE ASSEMBLY 
    Refer to PROCEDURE - Step 9
  36. INSTALL NO. 4 WATER BY-PASS HOSE 
  37. INSTALL NO. 1 EGR COOLER GASKET 
    Refer to PROCEDURE - Step 3
  38. INSTALL EGR VALVE GASKET 
    Refer to PROCEDURE - Step 4
  39. INSTALL EGR COOLER ASSEMBLY 
    Refer to PROCEDURE - Step 5
  40. CONNECT NO. 4 WATER BY-PASS HOSE 
  41. CONNECT NO. 3 WATER BY-PASS HOSE 
  42. INSTALL EGR VALVE ASSEMBLY 
    Refer to PROCEDURE - Step 9
  43. INSTALL EGR INLET GASKET 
  44. INSTALL EGR VALVE ADAPTER GASKET 
  45. INSTALL NO. 1 EGR PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 12
  46. INSTALL THROTTLE BODY GASKET 
    Refer to PROCEDURE - Step 1
  47. CONNECT NO. 5 WATER BY-PASS HOSE 
    Refer to PROCEDURE - Step 2
  48. INSTALL THROTTLE BODY WITH MOTOR ASSEMBLY 
    Refer to PROCEDURE - Step 3
  49. CONNECT NO. 6 WATER BY-PASS HOSE 
    Refer to PROCEDURE - Step 4
  50. INSTALL EXHAUST MANIFOLD TO HEAD GASKET 
  51. INSTALL EXHAUST MANIFOLD (TWC: Front Catalyst) 
    Refer to PROCEDURE - Step 3
  52. INSTALL MANIFOLD STAY 
    Refer to PROCEDURE - Step 4
  53. INSTALL NO. 1 EXHAUST MANIFOLD HEAT INSULATOR 

    Refer to PROCEDURE - Step 6

  54. INSTALL NO. 2 WATER HOSE CLAMP BRACKET 

    Torque: 13 N.m (133 kgf/cm, 10 ft.lbf) 

  55. INSTALL FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY) 

    Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

  56. INSTALL NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY 
    1. GTY1076427Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 2.0 to 7.0 mm (0.0787 to 0.276 in.) *b 120°(Claw of Clip Location)
      *c Paint Mark *d Protrusion
      *e RH Side - -
      1. Connect the No. 2 water by-pass pipe sub-assembly to the water by-pass outlet and slide the clip to secure it.
        NOTE:
        • Make sure to slide the No. 2 water by-pass pipe sub-assembly until it contacts the protrusion of the water by-pass outlet.
        • Make sure that the claws of the clip are within the location shown in the illustration.
      2. Install the No. 2 water by-pass pipe sub-assembly with the bolt.

        Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

  57. INSTALL NO. 2 TIMING CHAIN COVER INSULATOR 
  58. INSTALL V-RIBBED BELT TENSIONER ASSEMBLY 
    NOTE:
    • Do not apply or add any oil or grease to the belt tensioner to prevent abnormal noises from the belt tensioner pulley, belt squealing, etc.
    • Do not allow oil or grease to adhere to the moving parts of the belt tensioner, as this may cause malfunctions.
    GTY743260Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Torque: 21 N.m (214 kgf/cm, 15 ft.lbf) 

  59. INSTALL COMPRESSOR ASSEMBLY WITH PULLEY 
    Refer to PROCEDURE - Step 2
  60. INSTALL GENERATOR ASSEMBLY 

    Refer to PROCEDURE - Step 1

  61. INSTALL V-RIBBED BELT 
    Refer to PROCEDURE - Step 1
  62. INSTALL NO. 2 ENGINE COVER 

    Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  63. INSTALL DRIVE SHAFT BEARING BRACKET 

    Torque: 63.7 N.m (650 kgf/cm, 47 ft.lbf) 

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