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Reassembly [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. INSTALL INTAKE VALVE GUIDE BUSH 
    1. GTY1229384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion Height - -
      1. Using a caliper gauge, measure the intake valve guide bush bore diameter of the cylinder head LH.

        Standard Intake Valve Guide Bush Bore Diameter

        10.285 to 10.306 mm (0.405 to 0.406 in.)

        New Guide Bush Selection Chart

        Bush Size Specified Condition
        STD 10.333 to 10.344 mm (0.40681 to 0.40724 in.)
        O/S 0.05 10.383 to 10.394 mm (0.40878 to 0.40921 in.)

        HINT: 

        • If the intake valve guide bush bore diameter of the cylinder head LH is more than 10.306 mm (0.406 in.), machine the intake valve guide bush bore of the cylinder head LH to a dimension of 10.335 to 10.356 mm (0.407 to 0.408 in.) to install an O/S 0.05 intake valve guide bush.
        • If the intake valve guide bush bore diameter of the cylinder head LH is more than 10.356 mm (0.408 in.), replace the cylinder head LH.
      2. Heat the cylinder head LH to between 80 and 100°C (176 and 212°F).
      3. Place the cylinder head LH on wooden blocks.
        WARNING:

        Be sure to wear protective gloves.

      4. Using SST and a hammer, tap in a new intake valve guide bush to the specified protrusion height.
        • SST: 09201-10000 
          1. 09201-01050
        • SST: 09950-70010 
          1. 09951-07100

        Standard Protrusion Height

        9.30 to 9.70 mm (0.366 to 0.382 in.)

      5. Using a sharp 5.5 mm reamer, ream the intake valve guide bush to obtain the specified oil clearance.

        Standard Oil Clearance

        0.025 to 0.060 mm (0.000984 to 0.00236 in.)

  2. INSTALL EXHAUST VALVE GUIDE BUSH 
    1. GTY1237426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion Height - -
      1. Using a caliper gauge, measure the exhaust valve guide bush bore diameter of the cylinder head LH.

        Standard Exhaust Valve Guide Bush Bore Diameter

        10.285 to 10.306 mm (0.405 to 0.406 in.)

        New Guide Bush Selection Chart

        Bush Size Specified Condition
        STD 10.333 to 10.344 mm (0.40681 to 0.40724 in.)
        O/S 0.05 10.383 to 10.394 mm (0.40878 to 0.40921 in.)

        HINT: 

        • If the exhaust valve guide bush bore diameter of the cylinder head LH is more than 10.306 mm (0.406 in.), machine the exhaust valve guide bush bore of the cylinder head LH to a dimension of 10.335 to 10.356 mm (0.407 to 0.408 in.) to install an O/S 0.05 exhaust valve guide bush.
        • If the exhaust valve guide bush bore diameter of the cylinder head LH is more than 10.356 mm (0.408 in.), replace the cylinder head LH.
      2. Heat the cylinder head LH to between 80 and 100°C (176 and 212°F).
      3. Place the cylinder head LH on wooden blocks.
        WARNING:

        Be sure to wear protective gloves.

      4. Using SST and a hammer, tap in a new exhaust valve guide bush to the specified protrusion height.
        • SST: 09201-10000 
          1. 09201-01050
        • SST: 09950-70010 
          1. 09951-07100

        Standard Protrusion Height

        9.30 to 9.70 mm (0.366 to 0.382 in.)

      5. Using a sharp 5.5 mm reamer, ream the exhaust valve guide bush to obtain the specified oil clearance.

        Standard Oil Clearance

        0.030 to 0.065 mm (0.00118 to 0.00256 in.)

  3. INSTALL STRAIGHT PIN 
    1. GTY1230268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 34 mm (1.34 in.) *b Protrusion Height
      1. Using a plastic hammer, tap in 2 new straight pins to the cylinder head LH as shown in the illustration.

        Standard Protrusion Height

        17.5 to 19.5 mm (0.689 to 0.768 in.)

  4. INSTALL RING PIN 
    1. GTY1234261Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for Bank 1 *B for Bank 2
      *a Protrusion Height - -
      1. Using a plastic hammer, tap in 4 new ring pins to the cylinder head LH.

        Standard Protrusion Height

        2.5 to 3.5 mm (0.0984 to 0.138 in.)

  5. INSTALL STUD BOLT 
    1. GTY1238219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Intake Side *b Exhaust Side
      *c Cylinder Head Rear Side *d 20 mm (0.787 in.)
      *e 13 mm (0.512 in.) *f 35 mm (1.38 in.)
      *g 16 mm (0.630 in.) *h 9 mm (0.354 in.)
      *i 27 mm (1.06 in.) *j 26 mm (1.02 in.)
      *k 16.7 mm (0.657 in.) *l 51.7 mm (2.04 in.)
      1. Using an E8 "TORX" socket wrench, install the 2 stud bolts (A) and 6 stud bolts (B) to the cylinder head LH.

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

      2. Using an E6 "TORX" socket wrench, install the stud bolt (C) to the cylinder head LH.

        Torque: 4.0 N.m (41 kgf/cm, 35 in.lbf) 

  6. INSTALL SPARK PLUG TUBE 
    NOTE:

    When using a new cylinder head LH, the spark plug tubes must be replaced.
    1. GTY1229315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Application Width *b 9.0 to 15.0 mm (0.354 to 0.591 in.)
      *c Protrusion Height *d Cylinder Head Top Surface
      1. Apply adhesive to a new spark plug tube as shown in the illustration.

        Adhesive

        Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent

        Standard Application Width

        1.0 to 3.0 mm (0.0394 to 0.118 in.)

      2. Using a hammer and wooden block, install the 3 spark plug tubes to the specified protrusion height.

        Standard Protrusion Height

        73 mm (2.87 in.)

        NOTE:
        • Do not tap in the spark plug tube more than specified.
        • Do not start the engine for at least 1 hour after installation.
        • Be careful not to deform the spark plug tubes.
        • Be careful not to let adhesive drip into the cylinder head LH.
  7. INSTALL NO. 3 STRAIGHT SCREW PLUG 
    1. GTY1239055Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a 10 mm hexagon socket wrench, install 4 new cylinder head screw plug gaskets and the 4 No. 3 straight screw plugs.

        Torque: 65 N.m (663 kgf/cm, 48 ft.lbf) 

        NOTE:
        • Do not apply adhesive to the No. 3 straight screw plug.
        • The cylinder head screw plug gasket for No. 3 straight screw plug is not same that or water hole gasket for No. 1 straight screw plug.
  8. INSTALL NO. 2 STRAIGHT SCREW PLUG 
    1. GTY1236157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a 14 mm hexagon socket wrench, install a new cylinder head screw plug gasket and the No. 2 straight screw plug.

        Torque: 80 N.m (816 kgf/cm, 59 ft.lbf) 

  9. INSTALL NO. 1 STRAIGHT SCREW PLUG 
    1. GTY1227750Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Apply adhesive to the 2 No. 1 straight screw plugs.

        Adhesive

        Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent

      2. Using a 10 mm hexagon socket wrench, install 2 new water hole gaskets and the 2 No. 1 straight screw plugs.

        Torque: 44 N.m (449 kgf/cm, 32 ft.lbf) 

  10. INSTALL VALVE SPRING SEAT 
  11. INSTALL INTAKE VALVE STEM OIL SEAL 
    1. GTY1237605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Valve Stem Oil Seal - -
      *a Gray *b Black
      *c Intake Side *d Exhaust Side
      *e Correct *f Incorrect
      1. Apply a light coat of engine oil to a new intake valve stem oil seal.
        NOTE:

        Make sure to install each valve stem oil seal to the correct side. Installing an intake valve stem oil seal to the exhaust side or installing an exhaust valve stem oil seal to the intake side can cause installation problems later.

        HINT: 

        The intake valve stem oil seals are gray and the exhaust valve stem oil seals are black.

      2. Using SST, push in the 6 intake valve stem oil seals to the 6 intake valve guide bushes.
        • SST: 09201-41020 
        NOTE:

        Do not push in the intake valve stem oil seal at an angle.

  12. INSTALL EXHAUST VALVE STEM OIL SEAL 

    HINT: 

    Use the same procedure as for the intake side.

  13. INSTALL EXHAUST VALVE 
    1. GTY1237766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Valve Spring Retainer *2 Inner Compression Spring
      *3 Cylinder Head LH - -
      *a 30 mm (1.18 in.) or more - -
      Top Side - -
      1. Sufficiently apply engine oil to the tip area of the exhaust valve shown in the illustration.
      2. Install the 6 exhaust valves, 6 inner compression springs and 6 valve spring retainers to the cylinder head LH.
        NOTE:
        • Install the inner compression spring with its tapered side facing upward (towards the valve spring retainer).
        • Install the same parts in the same combination to their original locations.
      3. Using SST and wooden blocks, compress the inner compression spring and install the 6 valve spring retainer locks to the 6 valve spring retainers.
        • SST: 09202-70020 
          1. 09202-01010
          2. 09202-01020
        • SST: 09202-00021 
        NOTE:

        Install the same parts in the same combination to their original locations.

      4. Using a plastic hammer, lightly tap the valve stem tip to ensure a proper fit.
        NOTE:
        • Be careful not to damage the valve stem tip.
        • Be careful not to damage the valve spring retainer.
  14. INSTALL INTAKE VALVE 
    1. GTY1234059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Valve Spring Retainer *2 Inner Compression Spring
      *3 Cylinder Head LH - -
      *a 30 mm (1.18 in.) or more - -
      Top Side - -
      1. Sufficiently apply engine oil to the tip area of the intake valve shown in the illustration.
      2. Install the 6 intake valves, 6 inner compression springs and 6 valve spring retainers to the cylinder head LH.
        NOTE:
        • Install the inner compression spring with its tapered side facing upward (towards the valve spring retainer).
        • Install the same parts in the same combination to their original locations.
      3. Using SST and wooden blocks, compress the inner compression spring and install the 6 valve spring retainer locks to the 6 valve spring retainers.
        • SST: 09202-70020 
          1. 09202-01010
          2. 09202-01020
        • SST: 09202-00021 
        NOTE:

        Install the same parts in the same combination to their original locations.

      4. Using a plastic hammer, lightly tap the valve stem tip to ensure a proper fit.
        NOTE:
        • Be careful not to damage the valve stem tip.
        • Be careful not to damage the valve spring retainer.
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