LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 114 (Engine Mechanical System - Service Information (4 Of 4)) >> Engine Unit >> Installation [03/2022 - ] >> Procedure

Installation [03/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL NO. 3 EXHAUST MANIFOLD HEAT INSULATOR 

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

  2. INSTALL ENGINE OIL LEVEL DIPSTICK GUIDE 
    1. GTY1075143Courtesy 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.
  3. INSTALL IGNITION COIL ASSEMBLY 
    Refer to PROCEDURE - Step 2
  4. INSTALL FUEL INJECTOR SEAL 
    Refer to PROCEDURE - Step 1
  5. INSTALL INJECTOR VIBRATION INSULATOR 
    Refer to PROCEDURE - Step 2
  6. INSTALL C-RING 
    Refer to PROCEDURE - Step 3
  7. INSTALL NO. 1 FUEL INJECTOR BACK-UP RING 
    Refer to PROCEDURE - Step 4
  8. INSTALL NO. 3 FUEL INJECTOR BACK-UP RING 
    Refer to PROCEDURE - Step 5
  9. INSTALL NOZZLE HOLDER CLAMP 
  10. INSTALL DIRECT FUEL INJECTOR ASSEMBLY 
    Refer to PROCEDURE - Step 7
  11. INSTALL FUEL DELIVERY PIPE 
    Refer to PROCEDURE - Step 8
  12. INSTALL PORT FUEL INJECTOR ASSEMBLY 
    Refer to PROCEDURE - Step 1
  13. INSTALL NO. 5 ENGINE WIRE 
  14. INSTALL INJECTOR VIBRATION INSULATOR 
  15. INSTALL NO. 1 DELIVERY PIPE SPACER 
    Refer to PROCEDURE - Step 4
  16. INSTALL FUEL DELIVERY PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 5
  17. INSTALL WIRE HARNESS CLAMP BRACKET 
    1. GTY1075255Courtesy 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) 

  18. INSTALL NO. 6 ENGINE WIRE 

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

  19. INSTALL SENSOR WIRE 
    1. GTY1076791Courtesy 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 3 connectors.
  20. INSTALL NO. 7 WATER BY-PASS HOSE 
  21. INSTALL FUEL PUMP LIFTER ASSEMBLY 
    Refer to PROCEDURE - Step 1
  22. INSTALL FUEL PUMP SPACER GASKET 
  23. TEMPORARILY INSTALL FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 
    Refer to PROCEDURE - Step 3
  24. TEMPORARILY INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 4
  25. INSTALL FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 
    Refer to PROCEDURE - Step 5
  26. INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 6

  27. CONNECT FUEL TUBE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 7
  28. INSTALL FUEL PIPE CLAMP 
  29. INSTALL NO. 1 INTAKE MANIFOLD TO HEAD GASKET 
  30. INSTALL INTAKE MANIFOLD 
    Refer to PROCEDURE - Step 4
  31. INSTALL NO. 2 WATER BY-PASS PIPE 
    1. GTY1075473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an 8 mm socket wrench, temporarily install the No. 2 water by-pass pipe with the 2 bolts (B).
      2. Install the bolt (A).

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

      3. Using an 8 mm socket wrench, tighten the 2 bolts (B).

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

  32. INSTALL NO. 3 WATER BY-PASS PIPE 
    1. GTY1075500Courtesy 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) 

  33. SET EGR VALVE ASSEMBLY 
    Refer to PROCEDURE - Step 1
  34. CONNECT NO. 8 WATER BY-PASS HOSE 
  35. CONNECT NO. 4 WATER BY-PASS HOSE 
  36. INSTALL NO. 1 EGR COOLER GASKET 
    Refer to PROCEDURE - Step 3
  37. INSTALL EGR VALVE GASKET 
    Refer to PROCEDURE - Step 4
  38. INSTALL EGR COOLER ASSEMBLY 
    Refer to PROCEDURE - Step 5
  39. CONNECT NO. 4 WATER BY-PASS HOSE 
  40. CONNECT NO. 3 WATER BY-PASS HOSE 
  41. INSTALL EGR VALVE ASSEMBLY 
    Refer to PROCEDURE - Step 9
  42. INSTALL EGR INLET GASKET 
  43. INSTALL EGR VALVE ADAPTER GASKET 
  44. INSTALL NO. 1 EGR PIPE SUB-ASSEMBLY 
    Refer to PROCEDURE - Step 12
  45. INSTALL THROTTLE BODY GASKET 
    Refer to PROCEDURE - Step 1
  46. CONNECT NO. 6 WATER BY-PASS HOSE 
    Refer to PROCEDURE - Step 2
  47. INSTALL THROTTLE BODY WITH MOTOR ASSEMBLY 
    Refer to PROCEDURE - Step 3
  48. CONNECT NO. 5 WATER BY-PASS HOSE 
    Refer to PROCEDURE - Step 4
  49. INSTALL EXHAUST MANIFOLD TO HEAD GASKET 
  50. INSTALL EXHAUST MANIFOLD (TWC: Front Catalyst) 
    Refer to PROCEDURE - Step 3
  51. INSTALL MANIFOLD STAY 
    Refer to PROCEDURE - Step 6
  52. INSTALL NO. 1 EXHAUST MANIFOLD HEAT INSULATOR 

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

  53. INSTALL FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY) 
    1. GTY1074953Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Paint Mark *b 45° (Claw of Clip Location)
      *c Upper Side *d Front of Engine
      *e 2.0 to 7.0 mm (0.0787 to 0.276 in.) - -
      1. Install the water hose clamp bracket with the 2 bolts as shown in the illustration.

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

        NOTE:

        Temporarily tighten the bolt (A), and then fully tighten the 2 bolts in the order of (B) and (A).

      2. Connect the flow shutting valve (water by-pass hose assembly) to the water by-pass outlet and slide the clip to secure it.
        NOTE:
        • Make sure to slide the flow shutting valve (water by-pass hose assembly) until it contacts the hose stopper of the water by-pass outlet.
        • Make sure that the claws of the clip are within the location shown in the illustration.
      3. Install the flow shutting valve (water by-pass hose assembly) with the bolt.

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

  54. INSTALL NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY 
    1. GTY1075580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 45° (Claw of Clip Location) *b Paint Mark
      *c Upper Side *d Front of Engine
      *e 2.0 to 7.0 mm (0.0787 to 0.276 in.) - -
      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 hose stopper 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) 

  55. INSTALL COMPRESSOR WITH MOTOR ASSEMBLY 
    1. GTY1075163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt Nut
      1. Using an E8 "TORX" socket wrench, temporarily install the compressor with motor assembly with the 2 stud bolts.

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

      2. Install the compressor with motor assembly with the bolt and 2 nuts in the order shown in the illustration.

        Torque: 24.5 N.m (250 kgf/cm, 18 ft.lbf) 

  56. INSTALL DRIVE SHAFT BEARING BRACKET 

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

scientia non olet · About LEMON Manuals