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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 175 (Engine Mechanical System (A25A-FXS) - Service Information (3 Of 3)) >> Cylinder Head >> Disassembly [06/2018 - 08/2020] >> Procedure

Disassembly [06/2018 - 08/2020]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE INTAKE VALVE 
    1. Using SST, compress each intake valve compression spring and remove the 8 valve spring retainer locks.
      GTY758757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • 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 8 valve spring retainers, 8 intake valve compression springs and 8 intake valves from the cylinder head sub-assembly.

      HINT: 

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

  2. REMOVE EXHAUST VALVE 
    1. Using SST, compress each exhaust valve compression spring and remove the 8 valve spring retainer locks.
      GTY743452Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • 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 8 valve spring retainers, 8 exhaust valve compression springs and 8 exhaust valves from the cylinder head sub-assembly.

      HINT: 

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

  3. REMOVE VALVE STEM OIL SEAL 
    1. Using needle-nose pliers, remove the 16 valve stem oil seals.
      GTY772134Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE INTAKE VALVE SPRING SEAT 
    1. Using compressed air and a Magnet Hand, remove the 8 intake valve spring seats from the cylinder head sub-assembly by blowing air onto them.
      GTY756888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE EXHAUST VALVE SPRING SEAT 
    1. Using compressed air and a Magnet Hand, remove the 8 exhaust valve spring seats from the cylinder head sub-assembly by blowing air onto them.
  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.

    GTY756889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Using a 6 mm hexagon socket wrench, remove the 4 No. 1 straight screw plugs from the cylinder head sub-assembly.
  7. REMOVE STUD BOLT 
    NOTE:

    If a stud bolt is deformed or its threads are damaged, replace it.

    1. Using an E8 "TORX" socket wrench, remove the 7 stud bolts.
      GTY756885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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