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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Engine Mechanical System (2GR-FXS) - Service Information (3 Of 3)) >> Cylinder Head >> Disassembly [12/2023 - ] >> Procedure

Disassembly [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE INTAKE VALVE 
    1. GTY1237484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using SST and wooden blocks, compress each inner compression spring and remove the 6 valve spring retainer locks from the 6 valve spring retainers.
        • SST: 09202-70020 
          1. 09202-01010
          2. 09202-01020
        • SST: 09202-00021 

        HINT: 

        Arrange the removed parts in such a way that they can be reinstalled to their original locations.

      2. Remove the 6 valve spring retainers, 6 inner compression springs and 6 intake valves from the cylinder head LH.

        HINT: 

        Arrange the removed parts in such a way that they can be reinstalled to their original locations.

  2. REMOVE EXHAUST VALVE 
    1. GTY1237477Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using SST and wooden blocks, compress each inner compression spring and remove the 6 valve spring retainer locks from the 6 valve spring retainers.
        • SST: 09202-70020 
          1. 09202-01010
          2. 09202-01020
        • SST: 09202-00021 

        HINT: 

        Arrange the removed parts in such a way that they can be reinstalled to their original locations.

      2. Remove the 6 valve spring retainers, 6 inner compression springs and 6 exhaust valves from the cylinder head LH.

        HINT: 

        Arrange the removed parts in such a way that they can be reinstalled to their original locations.

  3. REMOVE INTAKE VALVE STEM OIL SEAL 
    1. GTY1234293Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using needle-nose pliers, remove the 6 intake valve stem oil seals from the 6 intake valve guide bushes.
  4. REMOVE EXHAUST VALVE STEM OIL SEAL 

    HINT: 

    Use the same procedure as for the intake side.

  5. REMOVE VALVE SPRING SEAT 
    1. GTY1239684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using compressed air and a Magnet Hand, remove the 12 valve spring seats by blowing air onto them from the cylinder head LH.

        HINT: 

        Arrange the removed parts in such a way that they can be reinstalled to their original locations.

  6. REMOVE NO. 1 STRAIGHT SCREW PLUG 
    NOTE:

    If coolant leaks from a No. 1 straight screw plug or a plug is corroded, replace it.
    1. GTY1227751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a 10 mm hexagon socket wrench, remove the 2 No. 1 straight screw plugs and 2 water hole gaskets from the cylinder head LH.
  7. REMOVE NO. 2 STRAIGHT SCREW PLUG 
    NOTE:

    If coolant leaks from a No. 2 straight screw plug or a plug is corroded, replace it.
    1. GTY1240820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a 14 mm hexagon socket wrench, remove the No. 2 straight screw plug and cylinder head screw plug gasket from the cylinder head LH.
  8. REMOVE NO. 3 STRAIGHT SCREW PLUG 
    NOTE:

    If coolant leaks from a No. 3 straight screw plug or a plug is corroded, replace it.
    1. GTY1239056Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a 10 mm hexagon socket wrench, remove the 4 No. 3 straight screw plugs and 4 cylinder head screw plug gaskets from the cylinder head LH.
  9. REMOVE INTAKE VALVE GUIDE BUSH 
    1. GTY1235600Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Heat the cylinder head LH to between 80 and 100°C (176 and 212°F).
      2. Place the cylinder head LH on wooden blocks.
        WARNING:

        Be sure to wear protective gloves.

      3. Using SST and a hammer, tap out the intake valve guide bush.
        • SST: 09201-10000 
          1. 09201-01050
        • SST: 09950-70010 
          1. 09951-07100
  10. REMOVE EXHAUST VALVE GUIDE BUSH 
    1. GTY1232150Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Heat the cylinder head LH to between 80 and 100°C (176 and 212°F).
      2. Place the cylinder head LH on wooden blocks.
        WARNING:

        Be sure to wear protective gloves.

      3. Using SST and a hammer, tap out the exhaust valve guide bush.
        • SST: 09201-10000 
          1. 09201-01050
        • SST: 09950-70010 
          1. 09951-07100
  11. REMOVE STRAIGHT PIN 
    NOTE:

    If a straight pin is deformed, replace it.
    1. GTY1231527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. REMOVE RING PIN 
    NOTE:

    It is not necessary to remove the ring pins unless they are being replaced.
    1. GTY1238293Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for Bank 1 *B for Bank 2
  13. REMOVE STUD BOLT 
    NOTE:

    If a stud bolt is deformed or its threads are damaged, replace it.
    1. GTY1239147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using an E8 "TORX" socket wrench, remove the 2 stud bolts (A) and 6 stud bolts (B) from the cylinder head LH.
      2. Using an E6 "TORX" socket wrench, remove the stud bolt (C) from the cylinder head LH.
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