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Replacement [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. REPLACE INTAKE VALVE GUIDE BUSH 
    1. Heat the cylinder head to 80 to 100°C (176 to 212°F).
    2. Place the cylinder head on wooden blocks.
      WARNING:

      Be sure to wear protective gloves.

    3. Using SST and a hammer, tap out the intake valve guide bushes.
      GTY469215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09201-10000 
        1. 09201-01050
      • SST: 09950-70010 
        1. 09951-07100
    4. Using a caliper gauge, measure the intake valve guide bush bore diameter of the cylinder head.

      Standard valve guide bush bore diameter

      10.285 to 10.306 mm (0.4049 to 0.4057 in.)

      Select a New Guide Bush (STD or O/S 0.05)

      Bush Size Specified Condition
      STD 10.285 to 10.306 mm
      (0.4049 to 0.4057 in.)
      O/S 0.05 10.335 to 10.356 mm
      (0.4069 to 0.4077 in.)

      If the intake valve guide bush bore diameter of the cylinder head is more than 10.306 mm (0.4057 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.4069 to 0.4077 in.) to install an O/S 0.05 intake valve guide bush.

      If the intake valve guide bush bore diameter of the cylinder head is more than 10.356 mm (0.4077 in.), replace the cylinder head.

    5. Heat the cylinder head to 80 to 100°C (176 to 212°F).
    6. Place the cylinder head on wooden blocks.
      WARNING:

      Be sure to wear protective gloves.

    7. Using SST, tap in new intake valve guide bushes to the specified protrusion height.
      GTY468683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion Height
      • SST: 09201-10000 
        1. 09201-01050
      • SST: 09950-70010 
        1. 09951-07100

      Standard protrusion height

      10.2 to 10.6 mm (0.402 to 0.417 in.)

    8. Using a sharp 5.5 mm reamer, ream the intake valve guide bushes to obtain the specified valve guide bush oil clearance.
      GTY127717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard oil clearance

      0.030 to 0.060 mm (0.00118 to 0.00236 in.)

  2. REPLACE EXHAUST VALVE GUIDE BUSH 
    1. Heat the cylinder head to 80 to 100°C (176 to 212°F).
    2. Place the cylinder head on wooden blocks.
      WARNING:

      Be sure to wear protective gloves.

    3. Using SST and a hammer, tap out the exhaust valve guide bushes.
      GTY467421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09201-10000 
        1. 09201-01050
      • SST: 09950-70010 
        1. 09951-07100
    4. Using a caliper gauge, measure the exhaust valve guide bush bore diameter of the cylinder head.

      Standard valve guide bush bore diameter

      10.285 to 10.306 mm (0.4049 to 0.4057 in.)

      Select a New Guide Bush (STD or O/S 0.05)

      Bush Size Specified Condition
      STD 10.285 to 10.306 mm
      (0.4049 to 0.4057 in.)
      O/S 0.05 10.335 to 10.356 mm
      (0.4069 to 0.4077 in.)

      If the exhaust valve guide bush bore diameter of the cylinder head is more than 10.306 mm (0.4057 in.), machine the bush bore to the dimension of 10.335 to 10.356 mm (0.4069 to 0.4077 in.) to install an O/S 0.05 exhaust valve guide bush.

      If the exhaust valve guide bush bore diameter of the cylinder head is more than 10.356 mm (0.4077 in.), replace the cylinder head.

    5. Heat the cylinder head to 80 to 100°C (176 to 212°F).
    6. Place the cylinder head on wooden blocks.
      WARNING:

      Be sure to wear protective gloves.

    7. Using SST, tap in new exhaust valve guide bushes to the specified protrusion height.
      GTY463155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 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.)

    8. Using a sharp 5.5 mm reamer, ream the exhaust valve guide bushes to obtain the specified valve guide bush oil clearance.
      GTY145207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard oil clearance

      0.025 to 0.065 mm (0.000984 to 0.00256 in.)

  3. REPLACE RING PIN 

    HINT: 

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

    1. Using a plastic-faced hammer, tap in new ring pins to the specified protrusion height.
      GTY458412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a for Bank 1
      *b for Bank 2
      *c Protrusion Height

      Standard protrusion height

      2.5 to 3.8 mm (0.0984 to 0.150 in.)

  4. REPLACE STRAIGHT PIN 
    NOTE:

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

    1. Using a plastic-faced hammer, tap in new straight pins as shown in the illustration.
      GTY467877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Protrusion Height - -
      *a for Bank 1 *b for Bank 2
      *c 34.0 mm (1.34 in) - -

      Standard protrusion height

      17.5 to 19.5 mm (0.689 to 0.768 in.)

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