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Reassembly [04/2013 - 08/2015]: Procedure

WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL SPARK PLUG TUBE 
    NOTE:

    When using a new cylinder head, the spark plug tubes must be replaced with new ones.

    1. Apply adhesive onto the shaded area of a new spark plug tube.
      GTY462754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Standard Application Width
      *b 9.0 to 15.0 mm (0.354 to 0.591 in.)

      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.)

      NOTE:

      Install the spark plug tube within 3 minutes after applying adhesive.

    2. Using a wooden block and hammer, tap in the spark plug tube to the specified protrusion height.
      GTY469975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Standard Protrusion Height
      *b Cylinder Head Casting Surface

      Standard protrusion height

      72.9 mm (2.87 in.)

      NOTE:
      • Be careful not to deform the spark plug tube.
      • Be careful not to expose the seal to engine oil for at least 1 hour after installing it.
      • To avoid tapping in the spark plug tube too far, measure the protrusion height while tapping it.
  2. INSTALL NO. 1 STRAIGHT SCREW PLUG 
    1. Apply adhesive to the No. 1 straight screw plug of the cylinder head.

      Adhesive

      Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent

      NOTE:

      Install the No. 1 straight screw plug within 3 minutes after applying adhesive.

    2. Using a 10 mm hexagon wrench, install 4 new water hole gaskets and the 4 No. 1 straight screw plugs.

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

      NOTE:

      Do not add engine oil at least 1 hour after installation.

  3. INSTALL NO. 2 STRAIGHT SCREW PLUG 
    1. Using a 14 mm hexagon wrench, install 2 new cylinder head screw plug gaskets and the 2 No. 2 straight screw plugs.

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

  4. INSTALL UNION 

    HINT: 

    It is not necessary to remove the union unless it is being replaced.

    1. Apply adhesive to the union of the cylinder head.

      Adhesive

      Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent

      NOTE:

      Install the union within 3 minutes after applying adhesive.

      GTY457315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Adhesive 1324
    2. Using a 12 mm union nut wrench, install 2 unions to the cylinder head as shown in the illustration.
      GTY470024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a for Bank 1 *b for Bank 2
      *c 67 mm (2.64 in.) *d 30 mm (1.18 in.)

      Torque: 14.7 N.m (150 kgf/cm, 11 ft.lbf) 

      NOTE:
      • Use the formula to calculate special torque values for situations where a union nut wrench is combined with a torque wrench.

        Refer to PRECAUTION [04/2013 - 08/2015]

      • Do not add engine oil at least 2 hours after installation.
  5. INSTALL STUD BOLT 
    NOTE:

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

    1. Using E6 and E8 "TORX" socket wrenches, install the stud bolts.
      GTY460448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a for Bank 1 Rear Side *b for Bank 1 Intake Side
      *c for Bank 2 Intake Side *d for Bank 1 Exhaust Side
      *e for Bank 2 Exhaust Side *f for Bank 2 Rear Side
      *g 52 mm (2.05 in.) *h 35 mm (1.38 in.)
      *i 27 mm (1.06 in.) - -

      Bolt A, B 

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

      Bolt C 

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

  6. INSTALL VALVE SPRING SEAT 
    1. Install the valve spring seats to the cylinder head.
  7. INSTALL INTAKE VALVE STEM OIL SEAL 
    1. Apply a light coat of engine oil to new intake valve stem oil seals.
      GTY466080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Intake Side
      *b Exhaust Side
      *c Gray
      *d Black
      NOTE:

      Pay attention when installing the intake valve stem oil seal and exhaust valve stem oil seal.

      For example, installing the intake valve stem oil seal into the exhaust side or installing the 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 intake valve stem oil seals.
      GTY458774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Valve Stem Oil Seal
      *a CORRECT
      *b INCORRECT
      • SST: 09201-41020 
      NOTE:
      • Failure to use SST will cause the intake valve stem oil seal to be damaged or improperly seated.
      • Do not push in the intake valve stem oil seal at an angle.
  8. INSTALL EXHAUST VALVE STEM OIL SEAL 

    HINT: 

    Use the same procedure as for the intake side.

    • SST: 09201-41020 
  9. INSTALL EXHAUST VALVE 
    1. Apply a sufficient coat of engine oil to the tip area of the exhaust valve shown in the illustration.
      GTY462539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 40 mm (1.57 in.) or more
    2. Install the exhaust valve, inner compression spring and valve spring retainer to the cylinder head.
      NOTE:

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

    3. Using SST, compress the inner compression spring and install the 2 valve spring retainer locks.
      • SST: 09202-70020 
        1. 09202-00010
        2. 09202-01010
        3. 09202-01020
      GTY461170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.
      NOTE:

      Be careful not to damage the retainer.

  10. INSTALL INTAKE VALVE 
    1. Apply a sufficient coat of engine oil to the tip area of the intake valve shown in the illustration.
      GTY461795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 40 mm (1.57 in.) or more
    2. Install the intake valve, inner compression spring and valve spring retainer to the cylinder head.
      NOTE:

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

    3. Using SST, compress the inner compression spring and install the 2 valve spring retainer locks.
      GTY468700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09202-70020 
        1. 09202-00010
        2. 09202-01010
        3. 09202-01020
    4. Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.
      NOTE:

      Be careful not to damage the retainer.