LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Fuel System - Service Information) >> FUEL INJECTOR (for Direct Injection) >> Removal [11/2021 - ] >> Procedure

Removal [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 

    Refer to REMOVAL [11/2021 - 03/2023] , or refer to REMOVAL [03/2023 - ] 

  2. DISCONNECT WIRE HARNESS 
    1. GTY1076962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY 
    NOTE:
    • If fuel intrudes into the combustion chamber, there may be adverse effects to the engine main body.
    • When replacing the fuel delivery pipe sub-assembly, it is necessary to replace the No. 1 fuel pipe sub-assembly with a new one.
    • Make sure not to touch or strike the tips of the direct fuel injector assemblies.
    • Make sure to support the resin part of each direct fuel injector assembly during removal to prevent a direct fuel injector assembly from falling.
    • Pull and remove the fuel delivery pipe sub-assembly in a straight line without tilting it.
    1. GTY1077576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the 5 bolts from the fuel delivery pipe sub-assembly.
      2. Install SST to the location shown in the illustration.
        • SST: 09260-48020 
      3. Remove the fuel delivery pipe sub-assembly from the cylinder head sub-assembly vertically.
  4. REMOVE DIRECT FUEL INJECTOR ASSEMBLY 
    NOTE:
    • To prevent bending the nozzle of the direct fuel injector assembly, do not hold it by the nozzle part.
    • Pull and remove each direct fuel injector assembly in a straight line to avoid damaging the seal surface of the fuel delivery pipe sub-assembly O-ring.
    • After removing the direct fuel injector assemblies, remove any O-rings, No. 1 fuel injector back-up rings and No. 3 fuel injector back-up rings remaining on the fuel delivery pipe sub-assembly side.
    • Attach a tag or label with the corresponding cylinder number to each direct fuel injector assembly so that they can be installed to their original locations.
      GTY1076472Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Cover the tip of each direct fuel injector assembly to prevent it from being damaged.
    1. When removing the direct fuel injector assemblies together with the fuel delivery pipe sub-assembly, perform the following procedure. (Perform step (b) if a direct fuel injector assembly remains attached to the engine side.)
      GTY1077116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Secure the fuel delivery pipe sub-assembly in a vise between aluminum plates.
      2. Pull out the 4 direct fuel injector assemblies.
    2. Perform the following procedure if a direct fuel injector assembly remains attached to the engine side.
      NOTE:

      Make sure to use SST if a direct fuel injector assembly remains attached to the engine side.

      GTY1077457Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bridge Part *b Hold
      *c Turn - -
      1. Install SST (A) to the installation hole of the fuel delivery pipe sub-assembly near the direct fuel injector assembly.
        • SST: 09260-48010 
      2. Install SST (B) to the direct fuel injector assembly and adjust so that the bridge part of SST (B) is at a right angle to SST (A) as shown in the illustration.

        HINT: 

        If the nozzle holder clamp is still attached to the direct fuel injector assembly, remove it before installing SST.

      3. Attach and secure SST (C).
      4. Set a torque wrench to SST and remove the direct fuel injector assembly while checking the value of the torque wrench.
        NOTE:

        If the torque exceeds 1.8 N.m (18 kgf/cm, 16 in.lbf) when removing the direct fuel injector assembly, replace it with a new one.

  5. REMOVE NOZZLE HOLDER CLAMP 
    1. GTY1076968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE NO. 3 FUEL INJECTOR BACK-UP RING 
    NOTE:

    Do not damage the area that contacts the O-ring.
    1. GTY1076711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using needle nose pliers, remove the No. 3 fuel injector back-up ring from each direct fuel injector assembly.
  7. REMOVE NO. 1 FUEL INJECTOR BACK-UP RING 
    1. GTY1077085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 O-ring *2 No. 1 Fuel Injector Back-up Ring
  8. REMOVE C-RING 
    1. GTY1076947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE INJECTOR VIBRATION INSULATOR 
    1. GTY1076944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE FUEL INJECTOR SEAL 
    1. GTY1077062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using the tip of needle nose pliers, pinch and pull the fuel injector seal at several points to stretch it.
        NOTE:
        • Excessively pinching the fuel injector seal may damage the groove of the direct fuel injector assembly.
        • If a direct fuel injector assembly is dropped or the tip of the direct fuel injector assembly is struck, replace it with a new one.
      2. Remove the fuel injector seal from each direct fuel injector assembly.
scientia non olet · About LEMON Manuals