DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Engine Mechanical System (A25A-FXS) - Service Information (3 Of 3)) >> Cylinder Head >> Disassembly [12/2019 - 10/2022] >> Procedure

Disassembly [12/2019 - 10/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  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 straight hexagon 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
Diesel-Data.com